Styles
Comments
Materials
#17 CFA Small Open Bore Mold
Very smooth frequency response, venting slopes out low fre-
quencies. Used for fl at and mixed losses.
Fitting Range
1 2 3 4
9
#18 CFA Bell or Horn Mold
Very smooth frequency response, high frequency emphasis
between 2-5K, also gives low end amplifi cation.
Fitting Range
1 2 3 4
9
#19 CFA Half Bored Cut Mold
Increases high frequency emphasis by 8-12dB between 2-5K,
performs best when vented.
Fitting Range
1 2 3 4
9
#20 CFA Large Open Bore Mold
Very similar to #19 CFA, but provides less low frequency
amplifi cation. Small vent commonly used.
Fitting Range
1 2 3 4
9
#21 CFA Reverse Curve Vented
Removes 8-10dB at 2-5K, reducing high frequencies
to a comfortable listening level.
Fitting Range
1 2 3 4
9
#21a CFA Reverse Curve without Vent
Similar to #21, however absence of vent allows higher gain
instruments to operate without feedback.
Fitting Range
1 2 3 4
9
Styles
Comments
Materials
#1 Standard
Used for hearing aids that have an external receiver,
body aids or communication molds.
Fitting Range
1 2 4 9
#2 Skeleton
Popular because of its light weight
& inconspicuous appearance.
Fitting Range
1 2 3 4
5 6 8 9
10
#3 Shell
Good retention thereby reducing
feedback problems.
Fitting Range
1 2 3 4
5 6 7 8
9 10
#4 Canal Lock
Light weight, good concealment,
concha lock helps retention.
Fitting Range
1 2 3 4
5 6 7 8
9
#4a Canal Lock with Helix
Helix lock in addition to canal lock
gives best retention.
Fitting Range
1 2 3 4
6 8 9
#5 Cros A (non occluding)
Used for CROS & IROS. Canal portion rests in lower aperture,
leaving upper canal open for venting.
Fitting Range
1 9
#6 Cros B (non occluding)
Canal portion hugs upper portion of aperture,
leaving lower portion for venting.
Fitting Range
1 2 3 4
6 9
#7 Cros C (non occluding)
Similar to #5 except canal portion of the earmold
is replaced by tubbing.
Fitting Range
1 2 3 4
6 9
#8 Acoustic Modifi er
Very short canal with wide bore, ideal for high frequency
precipitous losses. Easily modifi ed using SAV system.
Fitting Range
1 2 3 4
9
#9 Semi Skeleton
Concha portion of skeleton mold cut away
to accommodate physical problems.
Fitting Range
1 2 3 4
6 9
#10 Half Shell
A shell mold without the helix portion.
Inconspicuous appearance.
Fitting Range
1 2 3 4
5 6 7 8
9 10
#12 Canal
Offers ultimate concealment. Must have longer ear canal or
good bend for retention.
Fitting Range
1 2 3 4
5 6 7 9
10
C.F.A. EARMOLD STYLES
Earmold Materials
Polymethyl Methacrylate
(Acrylic)
• Suggested for fl accid ears
• Can be U.V. coated
1 Lucite
A hard, clear material.
Available with Oto Seal full fl ex canal.
2 Semi Flex
Same appearance as Lucite, but softens at body
temperature. Available with Oto Seal full fl ex canal.
3 Oto Seal
Beige coloured, softens more than Semi Flex
at body temperature.
Thermo Poly Vinyl Chloride
(Vinyl)
• Use our regular tubing cement
4 Skin Flex
Flexible material. Highly recommended for pediatrics.
Large array of colours.
Medical Grade Silicone
(Rubber)
• Use tube locks, not glue
• Best choice for Ear Defenders
• Recommended for severe & profound losses
• Superb sealing makes smaller shell size possible
• Best hypo-allergenic properties
• Consider using for excessive TMJ movement
5 Medi Light
Soft, fl oatable, used for swim molds.
Large array of colours.
6 Medi Sil
Soft pink translucent material.
7 Medi Sil 2
Super soft white material for very comfortable fi t,
also for sleeper molds.
8 True Tip
Combination of Medi Sil bowl & Medi Sil 2 canal.
Unsurpassed seal & comfort.
UV Material
9 UV Hard
Hypo-allergenic material.
10 UV Soft
COMMON EARMOLD STYLES
Earmold Style & Materials Guide
#214 12837 76th Avenue, Surrey BC, Canada
Toll Free: 1.800.661.7723
Vancouver Area: 604.590.1211
Fax: 604.590.0331
email: info@otohearing.com
www.otohearing.com
Continuous Flow Adapters
Features:
• System is characterized by a single snap in/snap out
tubing without crimping or changing tubing diameter
• Standardized bore size for lab use
• Dispensers can grind or adapt CFA earmold without
changing designed frequency response
• CFA earmolds do not require dampers in the earhook
tubing to achieve smoothing of the frequency response
