1. Natural ear canal resonance enhances our ability to hear _______.
A. Low Frequency sounds
B. Mid Frequency sounds
C. High Frequency sounds
D. All of the above correct answers C. High Frequency sounds
2. Part of the purpose of earmold design is to maintain _____.
A. Frequency respons...
Chapter 14: Couplers & Ear Molds for BTE Fittings || A+
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1. Natural ear canal resonance enhances our ability to hear _______.
A. Low Frequency sounds
B. Mid Frequency sounds
C. High Frequency sounds
D. All of the above correct answers C. High Frequency sounds
2. Part of the purpose of earmold design is to maintain _____.
A. Frequency response.
B. Output of HI.
C. The cosmetic appeal of the HI.
D. All of the above.
E. A and B. correct answers E. A and B.
3. For a severe to profound hearing loss, which is usually the most appropriate type of earmold?
A. CROS
B. Canal lock
C. Helix lock
D. Skeleton
E. Shell correct answers E. Shell
4. What type earmold is needed for a Body Instrument?
A. Half shell mold.
B. Skeleton mold.
C. Canal mold.
D. Receiver mold. correct answers D. Receiver mold.
5. A free field mold is a mold that does not cause_______.
A. an increase in the high frequency response
B. an increase in the high frequency response
C. ear canal resonance
D. ear canal occlusion
E. none of the above correct answers D. ear canal occlusion
6. What size vent would be most appropriate for a HI user with normal hearing in the low
frequencies and a sharply sloping loss above 2000Hz?
A. Pressure vent
B. The smallest vent available that is comfortable for the patient
C. The largest vent possible remembering that feedback may be a problem
D. A and B
E. A and C
F. None of the above correct answers C. The largest vent possible remembering that feedback
may be a problem
, 7. An example of an acoustic modification to an earmold is the ____ which enhances high
frequencies by increasing the volume of air at the end of the earmold.
A. Libby Horn.
B. Bell Canal.
C. Bakke Horn.
D. All of the above. correct answers D. All of the above.
8. When taking an ear impression, which method do earmold labs generally report as the most
accurate, resulting in fewer remakes?
A. hand packing the impression material
B. impression gun method
C. having the patient move his mouth up and down while the material is in his ear.
D. syringe method
E. All of the above correct answers D. syringe method
9. The smallest vent that can be created for a hearing instrument is called the _____ vent.
A. SAV [select-a-vent].
B. Open bore non-occluding vent.
C. Pressure vent.
D. Lateral, open 2 mm vent.
E. None of the above. correct answers C. Pressure vent.
10. The skeleton mold contruction outlines the rim of the ear but still seals the canal. This style
earmold is most suitable for ________.
A. Mild hearing loss patients.
B. Dexterity challenged patient regardless of hearing loss.
C. Profound to residual hearing loss patients.
D. Functionally non-hearing patients.
E. Janssen.
F. Functionally non hearing patients. correct answers C. Profound to residual hearing loss
patients.
11. The diagonal vent is in close proximity to (but not touching) the sound bore.
A. True.
B. False. correct answers B. False.
12. Where does the acoustic seal in an earmold occur?
A. In the bony portion of the ear canal
B. At the aperture of the meatus
C. In the concha
D. 3mm from the tympanic membrane
E. 3mm from the tympanic membrane
F. None of the above correct answers B. At the aperture of the meatus
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