1 Overview 2 Using Echo Meter Touch 3 Recordings 4 Testing the

1 Overview

1.1

Echo Meter Touch Ultrasonic Modules

1.2

App Features

1.3

2 Using Echo Meter Touch

2.1

App Permissions

2.2

Connecting the Ultrasonic Module

2.3

Navigating the app

2.4

Monitoring in Live Mode

2.5

Configuring Auto-ID

2.6

Recording in Live Mode

2.7

The Recording List

2.8

Viewing Spectrograms of Recordings

2.9

GPS View

2.10

Settings Screen

3 Recordings

3.1

Filenames for Recordings

3.2

Metadata Included in Recordings

3.3

Sharing Recordings via Email or Text Message

3.4

Backing Up Recordings

3.5

Transferring Recordings to a Computer

3.6

Importing Recordings

3.7

Analysis Software

4 Testing the Microphone Element

4.1

Calibration Mode Microphone Testing

4.2

Chirp Mode System Testing

5 Specifications

5.1

Physical

5.2

Audio

5.3

Storage Requirements

5.4

Module Firmware Updates

5.5

Android Device Compatibility

Overview

Echo Meter Touch app with an Echo Meter Touch Ultrasonic

Module allows you to listen to, record, and identify bats with

your Android phone or tablet. The Echo Meter Touch offers

exclusive features and unprecedented ease-of-use for a

handheld bat detector.

Echo Meter Touch Ultrasonic Modules are available from

www.wildlifeacoustics.com/products/echo-meter-touch

This guide is available for printing at:

www.wildlifeacoustics.com/support/documentation

1.1 Echo Meter Touch Ultrasonic Modules

Echo Meter Touch 2

Echo Meter Touch 2 ($179) is intended

for nature enthusiasts and batting

hobbyists.

Echo Meter Touch 2 Pro

The Echo Meter Touch 2 Pro ($349) is

designed for bat professionals and

features a higher quality microphone,

adjustable gain, and higher sample

rate.

1.2 App Features

Listen to bat echolocations in real time

Echo Meter Touch translates bat echolocations into

frequencies that are audible to humans using two

technologies.

Wildlife Acoustics’ patented Real Time Expansion (RTE) allows

you to listen to bats in real time with unparalleled fidelity. RTE

maintains the timing and tonality of the original

echolocations.

Heterodyne (HET) listening is also available, for those

accustomed to that way of hearing bats. Manual and

automatic tuning is available.

View the echolocations on a spectrogram

A real-time spectrogram shows the frequencies and timing of

the echolocations. Scroll back in time and zoom in on

previous "bat passes."

See most likely bat species in real time

The Auto ID feature analyzes the echolocation calls and shows

the two most likely bat species matches in real time. In North

America, a portrait of each bat taken by renowned bat expert

Merlin Tuttle will be show as well. This is the same technology

used in our professional Kaleidoscope Pro Bat Auto

Identification software. Currently, the app can identify 38

species in North America, 31 in Europe, 63 in the neotropics

and 20 in South Africa. For more information on Kaleidoscope

and a full list of species, visit our website.

AUTO-ID FINE PRINT: Because bats vary their echolocation

calls in response to a wide variety of needs, no automated

call identification can achieve 100% accuracy in species

identification. Nevertheless, in the hands of well-trained

experts, bat detector recordings can be used to identify

many species, providing invaluable discoveries. The Echo

Meter Touch allows high quality recording suitable for

analysis by experts. The built-in Auto-ID feature also

suggests the two most likely bat species for each recording,

for the enjoyment of enthusiasts hoping to learn more about

bats. These automated identifications, though largely

accurate, should not be relied on as a basis for scientific

research. Auto-ID is intended for use in analyzing recordings

of single bats in free flight in low clutter environments.

Recordings of roost emergence, multiple or captive bats,

bats in high clutter environments, or bat social calls are not

suitable for Auto-ID. In addition, the Auto-ID feature does not

include every possible bat for each of the covered regions.

Therefore, if a bat that is not included is recorded, it will be

identified by the app as a species with a similar echolocation

call type. In North America, there are seven species included

in the species list that do not have classifiers. They are

included so as to allow the user to learn about every species

that occur in their state.

Record to WAV files

Use triggered recording to automatically save bat passes to

full spectrum WAV files for analysis on a computer or to view

on your Android device. Or use manual record mode to

control start and stop of recording. View the recording

spectrogram and add voice or text notes. Listen to the

recording using RTE, HET, or traditional Time Expansion

Playback (playback at fractional speed to make the ultrasound

audible).

See your path and recording locations

View your path, including recording locations in satellite or

road map view. View identified species codes directly on the

map. Go to the recording's spectrogram from the map view.

Transfer to your computer to view in Google Earth. Your

Android device must have GPS capability or you must use a

Bluetooth GPS receiver for this functionality.

NOTE: This feature requires an Android device with a GPS

capability or a Bluetooth GPS receiver.

Transfer recordings to your computer

The Echo Meter Touch can transfer full spectrum WAV

recordings to your computer over a wireless network or

through a USB cable. Using Wi-Fi, the app bundles the

recordings in a .zip folder and allows download by entering a

URL in any web browser.

Share recordings via email or MMS messaging

You can share recordings via email or MMS messaging and

import and open files that have been shared with you.

1.3 Contact Us or Review the App

Please contact us with any suggestions, issues, questions, or

comments. We are always looking for ways to improve the

app for you. Tap Contact Us on the Information page of the

app to send your feedback.

If you like the app, please let others know by selecting

Review this App from the Information page.

Using Echo Meter Touch

This section describes how to use the Echo Meter Touch app

to monitor bats.

NOTE: The display examples in this guide were composed on

an iPhone in portrait orientation. There may be minor difference

on an Android device. You can also view the app in landscape

mode. On tablet sized devices, there are minor differences in

layout due to the larger display size.

2.1 App Permissions

The first time the Echo Meter Touch 2 app is run on an

Android device, the Android OS will ask for specific

permissions. You can allow or not allow any of these.

■

Storage permission allows the app to save recordings.

Microphone permission allows you to leave voice notes

for recordings.

■

Location permission allows the app to track the

recording path and tag each recording with the GPS

coordinates.

■

Phone permission allows the app to elegantly handle

incoming or outgoing phone calls in Live Mode. The

phone permission will only be asked on devices with

cellular call capabilities.

2.2 Connecting the Ultrasonic Module

The Echo Meter Touch Ultrasonic Modules sense ultrasonic

signals, digitize the signal, and transmit the ultrasonic data to

the Android phone or tablet.

Plug an Ultrasonic Module into the micro-USB or USB-C port

of your Android device and you can immediately start

listening to, recording, and identifying bats.

NOTE: Ultrasonic Modules manufactured through 2021 have a

micro-USB connector. Ultrasonic Modules manufactured after

2021 have a USB-C connector. Either type of connector on the

Ultrasonic Module can be used with either type of port on the

Android device. A USB-C to micro-USB, or micro-USB to USB-C

adapter can be used. Any adapter must conform to the OTG (On

the Go) Android specification.

1. Plug the Ultrasonic Module into the micro-

USB or USB-C port of your Android device.

2. The Android device asks you to open the

Echo Meter Touch app if it is not already

open.

NOTE: Some models of Android device and OS

version will ask for permission to record via USB

every time the Echo Meter Touch 2 Ultrasonic

Module is attached.

3. Press the START button to begin streaming

the ultrasonic data.

NOTE: The module should be pointed in the general direction

of the bats which requires the Android device to be turned

upside down as shown above.

2.3 Navigating the app

To navigate through the app, press the main menu symbol.

You can go to other sections of the app while still hearing and

recording bats. You can even continue to monitor and record

bats in the background while using other apps.

The main menu symbol

2.4 Monitoring in Live Mode

In LIVE MODE, ultrasonic data is streamed to your Android

device. The frequency and duration of the bat echolocation

calls are visually represented in a scrolling spectrogram.

In LIVE MODE you can scroll back and zoom into portions of

the scrolling spectrogram. After scrolling back in time, a

“Return to real-time” button appears at the top right of the

screen; press to jump forward to real-time. You can scroll

back in time through up to 10 minutes of history. The app will

intelligently reduce the history if the Android device is nearly

Spectrogram

Waveform

Frequency scale in kHz

Time scale in

milliseconds

full. A frequency reference line allows viewing a specific

frequency.

You can listen to bats using Wildlife Acoustics patented Real

Time Expansion (RTE) or Heterodyne (HET). RTE translates the

ultrasonic sounds to a range that is audible to humans by

taking tiny snippets of the sound and slowing it down. Since

there is quite a bit of space in between bat echolocation calls

relative to the length of the call, the space in between is used

to play back the slowed down call. When in HET mode,

double tap the grey frequency reference control to go into

RTE/HET/OFF toggle

off

Pinch and zoom in

time or frequency on

the spectrogram or

waveform

Tap to activate

frequency reference

line (drag to move)

Spectrogram Settings

Slide to change

waveform display size

auto-het mode. This will constantly tune to the frequency with

the most energy above the Trigger Minimum Frequency

setting (see below) or a minimum of 10 kHz for EMT1 and

EMT2 Pro or 16 kHz for EMT2. Just drag the grey slider on the

left side to manually tune.

A bandpass filter is implemented based on the zoom level of

the frequency axis in all listening modes. If you zoom in

frequency, you will only hear the frequencies visible on the

screen. If there is a quite a bit of low frequency noise, or the

recorder is picking up its own output, you can zoom such that

the noise is not seen on the screen and filter for a cleaner

sound. You can also filter out the higher frequency noise of

the EMT2 if you do not have very high frequency bats. Auto-

HET will only tune to frequencies visible on the spectrogram

based on zoom level.

Tap the Settings icon to open the spectrogram settings

panel. Here you can adjust the brightness and contrast of the

spectrogram as well as adjust the minimum frequency to

trigger a recording. In portrait orientation, it appears as

shown; in landscape orientation it appears at the top right of

the screen.

In Compressed mode, the Echo Meter Touch only shows

spectrograms containing ultrasonic signals. The spectrogram

Brightness and

Contrast of the

spectrogram

Recording Frequency

Threshold

does not scroll unless there is a signal such as bat

echolocations. In Expanded mode, the spectrogram scrolls in

real time. Use this mode to examine the timing between

previous bat echolocations. Because the signals scroll too

quickly, this mode is not recommended for monitoring.

Tap the STOP button to stop streaming data and put the

Ultrasonic Module into a low-power state. Press START to

resume.

2.5 Configuring Auto-ID

Enter Auto ID mode to view a list of available regions. Current

regions are North America, Europe and United Kingdom, and

Neotropics. There is also a South African region that is in

beta. Check a region to select all bats in that region. Tap a

region to learn more about the species and to select only bats

in your area.

A dropdown menu allows you to easily select only bats in

your North American state or Canadian province.

Toggle between

Compressed and

Expanded Mode

(Expanded shown)

Select region

After you select the bats to identify, you can automatically

identify them in LIVE MODE.

2.6 Recording in Live Mode

There are two methods of initiating a recording; using triggers

and manually. Using triggered recording, a recording is

triggered only when bat activity is detected and is ended

when there is no activity or 15 seconds have elapsed,

whichever comes first. As long as recording is turned on, the

device records automatically when bats are present, even

when the app is running in the background. There is also a

small manual record button which you can use to initiate a

recording. This can be used on its own or while triggered

recording is activated if the trigger misses something. When

you press the manual button, a recording starts 5 seconds

back in time and continues until you hit the button again or

15 total minutes is reached. The NOISE filter will not act on

Tap a species to learn

more about the species

or view the Merlin

Tuttle portrait.

Use dropdown to

select only bats in your

area for most accurate

results

Grey checks indicate

the species is in your

area but the app can’t

yet identify it.

manual recordings and Auto-ID will only run in real time if the

length is under 60 seconds.

During triggered recording, the Trigger Minimum Frequency,

in the Spectrogram Settings panel, should be set as high as

possible but lower than any expected bat echolocation. For

North America and the UK, 12 kHz works well. Lower

frequency signals will not initiate a recording. The Threshold

can be set between 6 kHz and 60 kHz.

During recording, animation appears around the Record

button. A white outline forms around the recording on the

spectrogram when a recording is in process. In addition, a

glowing red orb appears on all title bars in the app when

recording is activated and glows green when a recording is

triggered. The duration of the current recording is shown to

the right of the orb. Using triggered recording, the duration

of the current session is shown and using manual recording,

the duration of the current recording is shown. At the

conclusion of the recording, a label shows the filename. Tap

appropriate icon in the label to:

■

Identify the species of bat automatically, or override the

species tag.

■

Append voice or text notes to that recording.

■

Navigate to the recording location in GPS view.

■

Delete the recording.

Recordings with no bat detected are automatically tagged as

“NOISE” and automatically deleted. You can choose to not

auto-delete NOISE files in the Advanced Settings screen.

Using triggered recording, each time you press the Record

button a session is started. The session is concluded when

you toggle recording off. Each session is given a distinctive

color bar in the recording List and as a path in GPS View. An

option in the Advanced Settings screen organizes sessions

into nightly sessions (noon to noon) regardless of the number

of times recording is stopped and started. Each nightly

session exports in its own folder with its own KML file.

Using manual recording, the app automatically uses nightly

session mode for those recordings so as to avoid making a

folder for every recording.

The recording timer at the top of the screen starts at the

beginning of triggered recording session. Or at the beginning

of a manual recording. If a manual recording is made during a

triggered recording session, then after the manual recording

is over, the timer returns to the elapsed time for the triggered

session rather than restarting.

The top two bat’s scientific and common names appear in the

Auto-ID pop-up, which is shown for 10 seconds after

identification. This is not intended to ID two species of bats

that might appear simultaneously in a recording, though it

might in some circumstances. It is intended to give more

information in order to help you make the best ID possible

and also to allow you to see common confusions so you can

learn the ID’s limitations. You can also get a sense of the

accuracy ID from the pulse count. This shows the number of

echolocation pulses that match the top bat and the number

of total pulses. More matching pulses can indicate a stronger

match. You can select the runner-up species on the Auto-ID

pop-up to immediately tag the recording with that bat

instead of the front-runner. Click on the “i" icon to learn more

about that species. If you know that both species are

incorrect, select “CHOOSE ID FROM LIST” to label the

recording with any other selected species of bat or enter your

own six letter species code. The Auto-ID pop-up also shows

the ratio of echolocation calls of the top bat to the total

detected calls. This helps give a sense of confidence in the

identification.

You can also run ID on one or all recordings from the

recording list or while viewing spectrograms from the icon in

the recording label. Each recording takes a second or two to

identify. If Real Time ID is set on, the app will not be able to

trigger for a couple seconds following a recording while ID

takes place. The species code or NoID is assigned as a prefix

to the recording name. You can rerun Auto-ID if you should

choose to select different bat species to ID. In addition, from

the recording you can choose another label from your

selected bat species by pressing the yellow bat in the

recording label.

Triggered recording

and/or manual

recording

Auto-ID pop-up

Click to label recording

with alternate bat

Label recording with

another species of bat

Learn more about bat

species

Pulse count

Tap the recording label icon to open the NOTES page. Voice

and text notes are saved as metadata in the recording so they

can be transferred with the recording to a computer.

2.7 The Recording List

Here you can see a list of all of your recordings. The list can

be sorted by Time or Species. The latter is useful to sort by

species for identified recordings or to sort out noise or NoID

recordings. Tapping again will reverse the sort order. Tap

on a recording in the list to view the spectrogram or leave

notes. If you are monitoring and recording in the background

you will be advised that you are leaving Live Mode.

Tap the Edit button at the top right to delete recordings,

transfer recordings to your computer via Wi-Fi, share

recordings or identify the bat species in the recordings. Press

a box to individually ‘check it’ in the list. You can select

Record voice note: tap

to start and stop

Write text note

Save Note

multiple recordings from the list by checking the box of any

recording, then pressing and holding the checkbox of any

recording above or below. This will check all boxes in

between.

Press the Summary button to show a pop up screen with the

number of recordings with each identified species, NoIDs, and

the NOISE files. This will summarize all recordings if none are

checked, or a subset if only some have been selected with the

checkboxes.

Use the search bar to search for species IDs or to search the

text of any text notes you have added.

Icons indicate

recordings with voice

or text notes and

recordings with an

identified species

Colored recording

session identifier

Show summary pop-

In addition to running ID or manually labeling recordings, the

Auto-ID button will also give the option to remove all IDs

from the checked recording. This will remove the ID meta

data as well as the filename prefix.

The app has a limit of 10,000 recordings and recordings will

need to be transferred or deleted to activate recordings once

that limit has been reached.

2.8 Viewing Spectrograms of Recordings

Tap a recording from the Recordings list or from GPS view to

view the spectrogram of the recording, leave a voice or text

note, identify the bat, and listen to the recording. You can

listen using RTE, (HET), or Time Expansion (TE) playback. Use

TE to play the recording at a slow speed that renders

ultrasound into audible sound. In compressed view, you will

only hear visible signals during playback, not the space in

between echolocations. For HET and RTE, the playback occurs

Delete checked recordings

Check individually

Transfer checked

recordings via Wi-Fi or

share via Email or MMS

Identify checked

recordings or manually

label bat species

Check all recordings

Exit Edit mode

on all samples as though expanded view is selected, whether

in compressed or expanded view. This lets you hear exactly

how the bat would have sounded in live mode. As in Live

Mode, heterodyne can be tuned automatically or manually.

Press the up or down buttons to go to the next or previous

recording in the recording list. The order of the recordings will

match the sorting chosen in the list. Colored vertical bars at

the beginning of each recording show the corresponding

recording session and match the color shown in the recording

list as well as the path in GPS view.

You can filter the audio for better fidelity as in Live Mode by

zooming to only the frequencies of interest.

Spectrograph settings are available as in LIVE MODE.

2.9 GPS View

In GPS VIEW, you can see the locations of recordings and

species ID and the track of your recording session on a map.

Each recording session is shown with a different path color.

NOISE files and path lines can be shown or hidden..

A KML file is generated and stored with the session

recordings in the session folder. If any recording from a

recording session is transferred via Wi-Fi, a KML file will be

included in the session folder with all recording’s waypoints

shown. You can also download the files through iTunes as

described in this User Guide. KML files can be opened directly

Scroll and Zoom

spectrogram or

waveform as in Live

Mode

Playback

Choose RTE, HET, or TE

Recording label -

write/edit notes, run ID,

delete file or go to map

view

Go to next or previous

recording in the list

in Google Earth to show the recording locations, species IDs

and recording path

The zoom to current location triangle in the lower right of

the GPS view zooms to your current location and scrolls the

map as you move. The blue dot indicates it is in auto-scroll

mode. If you scroll away from your location, the dot turns

gray and auto-scroll turns off.

2.10 Settings Screen

The Setting screen is accessible from the Main menu.

Tap to go to recordings

Toggle between map

and satellite views

Zoom or scroll map

view

Center and follow

mode

Turn Paths On and Off

Show or Hide NOISE

files

Audio Division Ratio

Adjusts how the RTE sounds in Live Mode and how RTE and

TE sound on a previously made recording. 1/10 is higher pitch

and 1/20 is lower.

Values: 1/10, 1/20

Default: 1/20

Nightly Sessions Mode

Set to ON to organize sessions into nightly sessions (noon to

noon) regardless of the number of times recording is stopped

and started. Each nightly session exports in its own folder with

its own KML file.

Using manual recording, the app automatically uses nightly

session mode for those recordings so as to avoid making a

folder for every recording.

Values: ON, OFF

Default: OFF

Save Noise Files?

Recordings with no bats detected are automatically tagged as

“NOISE”. You can choose whether to save these files or

automatically delete them.

Values: ON, OFF

Default: OFF

Real-Time Auto ID

If ON, Auto-ID will run immediately after concluding a

recording and the Auto-ID pop-up will be displayed.

Values: ON, OFF

Default: ON

Real-Time Auto ID Sensitivity

Adjusts how conservative the ID results will be. On

SENSITIVE, more bats will be identified even if the algorithm

is less confident of the result. On ACCURATE, only bats in

which the algorithm is very confident will be shown.

BALANCED is in between.

Values: SENSITIVE, BALANCED, ACCURATE

Default: SENSITIVE

Trigger Sensitivity

Adjusts the recording trigger sensitivity level. High is

extremely sensitive and maximizes detection, but will also

trigger from other noises resulting in NOISE files. Low will

only trigger on stronger signals that are likely to be able to be

identified. Medium is somewhere in between the two

extremes. The trigger only applies to signals that are higher in

frequency that the Trigger Minimum Frequency setting in

the Spectrogram Settings panel.

Values: LOW, MEDIUM, HIGH

Default: MEDIUM

Trigger Window

The recording continues for this amount of time after the last

signal that satisfies the trigger. (The recording is also

truncated when it reaches the maximum recording duration

set by Max Trigger Length.) Set the trigger window setting

long enough to avoid a recording that ends after one

echolocation call. For example, if bat echolocation calls occur

every 0.5 seconds and trigger window is 0.1 seconds, you

would get a new trigger with every single echolocation call.

NOTE: Some standards describe a specific recording trigger

window as a bat pass.

Values: 1 to 15 seconds in 1-second increments

Default: 3 seconds

Max Trigger Length

You can specify the maximum length (time duration) of

recordings to comply with file size restrictions of your analysis

software or to fulfill a specific recording protocol or definition

of a bat pass.

Values: 1 second to 60 seconds in 1-second increments

Default: 15 seconds

Gain (Echo Meter Touch 2 Pro only)

The Echo Meter Touch 2 Pro has configurable gain. The HIGH

setting roughly corresponds to the gain on the Echo Meter

Touch 1 and the SM4BAT FS set to the default 12dB level. This

can be useful for recording very distant or quiet bats.

MEDIUM corresponds to the gain on the Echo Meter Touch or

the 0dB gain setting on the SM4BAT FS and is a good setting

for general recording. The LOW setting is 12 dB lower than

MEDIUM and is useful for recording hand released bats or

any other situation where the bats are close or loud.

Values: LOW, MEDIUM, HIGH

Default: MEDIUM

Sample Rate (Echo Meter Touch 2 Pro only)

The sample rate on the Echo Meter Touch 2 Pro can be set to

256k or 384k. 256k will record up to 128kHz which is sufficient

for all North American and European bats. 384k will record up

to 192kHz but will use proportionately more storage for

recordings.

Values: 256k, 384k

Default: 256k

Select Storage

Selects the storage location for the recordings. If your

Android device accepts an SD card, you may choose to store

recordings to that card.

Values: Internal, SD Card

Default: Internal

NOTE: For Android versions 8 and 9, after the storage location

has been changed from internal to SD card, the next time the

Live Mode screen is opened a pop-up message will appear to

choose the root directory to grant write access. The choices are

“Cancel" or “Open". Select “Open" to be taken to a folder

selection screen. There, press "Select", which by default is the

root directory of the SD card. This process is only required once

after changing the location under Android 8 or 9. This process

is not required under Android 10 or later.

Advanced Settings

Clean Recording Database

This button will make sure that each recording in the list still

points to a recording file on your device. Sometimes

recordings can end up in this list with no associated file if the

user deletes files in the file system of the device or through

iTunes. Cleaning this up when the app is "initializing" on start

up just takes too long so this is a way to clean house when

needed without start-up delays.

Restore Defaults

Press the Restore Defaults button to restore the following to

defaults: zoom level, spectrogram settings and advanced

settings. It also unselects all bats on the AUTO-ID SELECTION

screen.

Update Module Firmware

Firmware should only be updated as directed by Wildlife

Acoustics support to address issues with some models of

Android devices.

Recordings

This section describes the format of the recordings, how to

transfer them to or from a computer, and how to share them

with others.

3.1 Filenames for Recordings

Recordings use the following naming convention:

ID_YYYYMMDD_HHMMSSWAV

The first three letters of the species and the first three letters of

the genus for recordings that have been identified, NoID if

Echo Meter Touch was unable to identify the recording or

NOISE if the no bats are detected in the recording.

YYYYMMDD_HHMMSS

The full timestamp including the year, month, day, hour,

minute, and second when the recording started.

3.2 Metadata Included in Recordings

Metadata is stored in the recording file in the standard

GUANO format as well as Wildlife Acoustics’ proprietary

format. For more information om the format, visit

www.wildlifeacoustics.com/SCHEMA/GUANO.html. Metadata

is visible in Wildlife Acoustics Kaleidoscope free spectrogram

viewer software and can be tabulated in spreadsheet form

using Kaleidoscope’s converter function. Kaleidoscope

software has the ability to add further metadata relating to

analysis of the recording. The following are some of the

metadata stored in each recording:

Device Model: Displays the type of Echo Meter Touch.

Module Serial Number

App Version

Timestamp

GPS Coordinates: The location and elevation of the Echo

Meter Touch when the recording started.

Voice and Text Notes

Species ID: Stores the Auto-ID species, if run, as well as any

manual ID added by the user.

Settings: Including Gain, Sample Rate, Max Trigger Length,

Trigger Window, Trigger Sensitivity, and Trigger Minimum

Frequency.

3.3 Sharing Recordings via Email or Text Message

Recordings can be shared via Email or MMS text.

1. Tap the Edit button at the top right to make the edit bat

appear.

2. Select one or more recordings (up to 20MB total).

3. Tap the Share button and select Email or MMS. A message

composition window opens.

NOTE: Android devices apply a maximum size limit to MMS

attachments. This can vary between .3MB and 1MB. Recordings

larger than the maximum size limit cannot be shared via MMS

messaging.

Shared recordings can be imported into the app.

1. Press and hold the recording attachment in the email or text

message.

2. Select the Echo Meter Touch app. The recording is imported

into the app.

All imported files must have been recorded using Echo Meter

Touch app (as opposed to another bat recorder) and will be

stored in a session folder called Imported Files. Imported

files have a white session color in the recording list.

3.4 Backing Up Recordings

It is advised to back up your Android device since all your

recordings can be lost if the your Android device is lost or

damaged. There are many third-party apps to allow backing

up data on your device. Recordings will not be backed up

through the Google data back up under “backup & reset” in

the Android settings.

Recordings are not stored as part of the app, they are stored

in a separate folder on an SD card or internal memory, so

deleting the app will not delete recordings. If you delete and

reinstall the app, you will need to re-associate the recordings

for them to be visible to the app:

1. Shut down the app.

2. Move recordings or folders into the Echo Meter >Import

folder using the files app.

3. Launch the app to import them so they appear in the app

3.5 Transferring Recordings to a Computer

Recordings can be transferred to your computer via Wi-Fi or

through a USB cable.

Using Wi-Fi

1. Tap the Edit button at the top right to show the edit bar.

2. Select one or more recordings.

3. Tap the Share button and select Wi-Fi to compress all the

recordings into one or more transfer files (not to exceed 1GB).

4. A short URL with an IP address and port appears.

5. Type the address exactly as shown into any web browser on

any computer on the same wireless network.

6. A page appears where you can download the recordings.

Preparing files

Ready to download

Using a USB cable on a Windows PC

Recordings can also be transferred to your computer using a

USB cable (the charging cable that comes with the Android

device).

1. Plug the Android device into the computer using the charging

cable. It will appear in your Windows file manager window as

a standard device.

Navigate to the recordings at path: Device name > Internal

Storage > Documents > EchoMeter > Recordings

2. Copy any recordings or session folders onto your computer

using drag and drop.

3. Select the recording sessions you want to transfer and press

the Save to button to select a destination.

Using a USB cable on a Mac

Recordings can also be transferred to your computer using a

USB cable (the charging cable that comes with the Android

device).

1. Download and install the free third-part program called

Android File Transfer.

2. Plug the Android device into the mac computer using the

charging cable. The Android File Transfer program will

automatically open whenever you connect an Android device

to your Mac.

3. Navigate to and open the EchoMeter folder.

4. Copy any recordings or session folders onto your computer

using drag and drop.

3.6 Importing Recordings

You can import recordings and/or session folders into the app

from your computer or from an email or text. This is useful if

you need to switch to a new Android device and want to

transfer your recordings or you want to import recordings or

sessions shared with you from a friend.

Using a USB cable to import from a computer

1. Connect your Android device to a Mac or Windows computer

via USB cable.

2. Open the EMT app and go to the Settings screen.

3. Select either Internal or SD Card storage. This sets the

recording destination and also sets the import destination.

4. Close the EMT app and connect the Android device to your

computer using the USB cable charging cable.

■

On Windows, it will appear in the file manager window as a

standard device.

■

On Mac, Download and install the free third-party program

called Android File Transfer to access the files on you

Android device.

5. Navigate to:

■

SD Card/Documents/EchoMeter/Import

■

Internal Storage/Documents/EchoMeter/Import

6. If the Import folder is missing you must create a new folder

and name it “Import”.

7. Copy all session folders and/or independent recordings that

you wish to import into your EMT device into the Import

folder.

■

You can also add Zipped session folders.

8. On the Android device, launch the Echo Meter Touch app.

■

The app should see the files to import and ask for

permission to import them.

■

The app will then ask to select the folder for import.

9. Select the folder which corresponds with the "Select Storage"

setting.

■

If set to Internal, select:

"Internal/Storage/Documents/EchoMeter".

■

If set to SD card, select: "SD

Card/Documents/EchoMeter".

10. After choosing, tap “use this folder”, and all the files will now

be imported into the app on your device and they can then

be found in the recordings list. The recordings or sessions will

then be deleted from the Import folder. Sessions will be

shown with a unique color bar and the path will be imported

into GPS view as well.

Importing from an email or text

1. Open the EMT app and go to the Settings screen.

2. Select either Internal or SD Card storage. This sets the

recording destination and also sets the import destination.

3. Close the EMT app.

4. On the Android device, copy the recordings, sessions folders,

or zipped session folder to the following folder that

corresponds to the above storage setting:

■

SD Card/Documents/EchoMeter/Import

■

Internal Storage/Documents/EchoMeter/Import

5. If the Import folder is missing you must create a new folder

and name it “Import”.

6. Continue from Step 8 in the “Using a USB cable to import

from a computer” section above.

3.7 Analysis Software

Use the free Kaleidoscope Viewer to create a spreadsheet file

showing your recording’s metadata and notes and view

spectrograms of your bat recordings on a computer. Upgrade

to Kaleidoscope Pro to add automatic classification of bats.

You can also use third party bat analysis software for your

Echo Meter Touch recordings.

Testing the Microphone Element

Use the available Ultrasonic Calibrator to test the microphone

element on the Echo Meter Touch. Since ultrasound is beyond

the range of human hearing, verifying performance requires

special equipment. The Ultrasonic Calibrator helps you test

both the microphone and the full recording system.

The calibrator uses a 9V alkaline battery (included with the

calibrator). When the battery is depleted, the calibrator can no

longer provide a tone and its LED no longer illuminates. While

the recorder may still emit sound at this point, it cannot be

used as an accurate calibrator until the battery is replaced.

The calibrator offers two modes of operation. Calibration

mode is used to test the microphone at close range and Chirp

mode is used to test the entire system at a greater distance.

4.1 Calibration Mode Microphone Testing

1. Remove the clear calibrator

microphone adapter by sliding it off

the calibrator from the bottom.

2. Turn the calibrator ON and set the

toggle switch to CAL (calibration).

The calibrator generates a 40 kHz

inaudible tone.

3. If you are using the Pro version of

the EMT 2, set the gain to Medium

in the Advanced Settings of the app.

4. Enter Live Mode on the Echo Meter Touch. Make sure you are

in expanded view or the spectrogram will adapt to the

calibration tone and stop scrolling. Also turn the volume on

your phone or tablet down so as to avoid acoustic feedback

affecting the test.

5. Drag the slider to maximize the size of the red waveform

panel at the top of the screen.

6. Point the acoustic horn of the

Echo Meter Touch directly at

the calibrator speaker.

7. Observe the waveform level on

the screen. Move the Echo Meter

Touch around until the waveform is

maximized. There is variation in

microphone sensitivity between units

an calibrators so you may see a larger

waveform, but a microphone is good

if the waveform takes up more than ¼

of the waveform panel.

4.2 Chirp Mode System Testing

To test the entire system, use the Ultrasonic Calibrator in

Chirp mode to emit loud ultrasonic signals that can be picked

up by the Echo Meter Touch from some distance. This can be

used to verify all triggering and recording functions.

8. Turn the calibrator ON and set the toggle switch to CHIRP.

The calibrator emits a 100ms long tone at 40kHz (+/- 10Hz)

every 500ms. The amplitude of the tone is 104dB SPL (+/-

3dB) at 10cm.

9. Enter Live Mode on the Echo Meter Touch and place the

calibrator within 20 meters to assure the signal can be

received.

10. With the calibrator chirping, you can test trigger settings and

monitoring modes.

WARNING! Do not place the Ultrasonic Calibrator near your

ears. In CHIRP mode, the calibrator emits a 40 kHz signal at over

100 dB SPL. Prolonged exposure to high intensity ultrasonic

signals may cause permanent hearing loss at audible

frequencies.

Specifications

5.1 Physical

Echo Meter Touch 2 and 2 Pro

Length w/o connector:

1.4 inches (35mm)

Width:

1.9 inches (48 mm)

Thickness:

.4-.6 inches(10-16mm)

Weight:

0.7 ounces (20g)

Material:

Polycarbonate/ABS

Environmental:

Weather resistant but avoid rain

5.2 Audio

EMT 2

EMT 2 Pro

Recording Format:

16-bit WAV

Gain:

Fixed

3 settings

Sample Rate:

256kHz

256kHz/384kHz

Directionality:

Slightly

Directional

Slightly

Directional

Hi Pass Filter

None

2-pole at 8kHz

Maximum Recording Frequency: Half of the sample rate (up

to 128 kHz for 256 kHz sample rate and up to 192 kHz for 384

kHz sample rate)

Signal to Noise Ratio: This is a measure of quality within the

recording bandwidth. A higher value is better.

Directionality: The waveguide on the EMT 2 provides some

directionality to reduce extraneous noise and echoes.

5.3 Storage Requirements

How many recordings you can store on your Android device

depends on the capacity of your device and how much

memory is available. A 5.0-second recording uses 2.5 MB of

storage. A 32 GB phone with 28 GB of storage available, for

example, would be able to save over 10,000 recordings.

If you have an Android device that accepts an external SD

card and have chosen that as your storage location on the

Advanced Settings, screen, the following is the file path for

the recordings on the card: Android--> data-->

emtouch.wildlifeacoustics.com.echometer --> files-->

EchoMeter--> Recordings

The app also needs at least 600mb of internal memory

storage for sufficient buffering of Live Mode. The app will

warn you if you have insufficient storage.

5.4 Module Firmware Updates

The firmware on the Echo Meter Touch module can be

updated through the app to improve compatibility with

current or future Android devices. If new firmware is available,

a pop-up alert will be shown giving the option of updating or

waiting. The update process takes under a minute. Do not

remove the module during the process.

5.5 Android Device Compatibility

Echo Meter Touch 2 is designed to work with Android tablets

and phones running Android version 8.0 or later and with at

least 1GB of RAM. For a full list of compatible devices and

more details on requirements visit:

www.wildlifeacoustics.com/devices.

The site will be updated with tablets and phones known to be

compatible and incompatible. You can also find information

on USB converters, extenders and cables.

Wildlife Acoustics, Echo Meter, and Kaleidoscope are registered with the U.S.

Patent and Trademark Office. All other trademarks are the property of their

respective owners.

The Echo Meter Touch is covered under the following patents:

US 8599647, 10612967, D813,835

GB 2480358, 2559838

Wildlife Acoustics, Inc.

3 Mill and Main Place, Suite 110

Maynard, MA 01754 USA

www.wildlifeacoustics.com

Updated on 12/11/2023