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A properly fitted ear mold should:
A) Hold the receiver in place
B) Seal the ear canal in some cases
C) Direct amplified sound towards the Tympanic Membrane
D) Be cosmetically appealing
E) All of the above
E) All of the above
The transistor depends upon the flow of electrons through:
A)A gas
B) A semi-conductor
C)A solid
D) a and c
E) b and c
E) b and c
Which of the following pairs correctly compares transistors to vacuum tubes:
A) Emitter/Grid
B) Collector/Cathode
C) Base/Anode
D) Semi-conductor/filament
E) Current Amplifier/Voltage Amplifier
D) Semi-conductor/filament
One of the following statements about volume controls is not accurate:
A) Allows user to select a comfortable listening level
B) Are mostly of the carbon type
C) Has consistent taper from aid to aid
D) Has a range of between 30 - 40 dB in an aid
E) Is sometimes a screw set control
B) Are mostly of the carbon type
Which of the following battery cells is used most frequently today:
A) Mercury
B) Silver oxide
C) Nicade
D) Zinc oxide
E) Zinc air
E) Zinc air
The sound applied to the microphone is referred to as:
A) Output
B) MPO
C) Input
D) Saturation
E) Gain
C) Input
The failure for a system to reproduce a wave form exactly is:
A) Frequency response
B) Distortion
C) Compression
D) Rarefaction
E) Saturation
B) Distortion
The latest performance standards for hearing aids to which they are manufactured is:
A) ANSI 1987
B) HAIC 1999
C) ANSI 1984
D) ANSI 1996
E) ISO 1995
D) ANSI 1996
If a hearing aid has a gain of 40 dB and the input is 65 dB, the output will be:
A) 100 dB
B) 130 dB
C) 15 dB
D) 125 dB
E) 105 dB
E) 105 dB
If the maximum output of an aid is at 1000 Hz and is 130 dB, with a gain of 50 dB what was the input?
A) 60 dB
B) 50 dB
C) 70 dB
D) 90 dB
E) they are equal at 1000, 1600 and 2500 Hz
C) 70 dB
The component which gives the patient direct control of the amplification is:
A) Trim pot
B) program button
C) Volume control
D) Receiver
E) Potentiometer
C) Volume control
The event which lead to electrical hearing aids was:
A) Transistor development
B) Vacuum tube development
C) Carbon-telephone development D) Battery development
E) IC development
D) Battery development
Your client purchased two hearing aids 6 months ago from another Hearing Aid Dispenser. The client is not satisfied with the hearing aids performance and does not want to return to that Dispenser. You should ____ ?
A) Encourage him to go back to the original specialist anyway
B) Return the hearing aids as soon as possible
C) Re-test and evaluate the fitting
D) Re-test and fit with other hearing aids.
C) Re-test and evaluate the fitting
The primary functions of the outer, middle and inner ear include...
A) Equilibrium
B) Hearing
C) Auditory processing
D) a and b
E) b and c
D) a and b
When sound consists of only one frequency it is called?
A) Noise
B) Puretone
C) Tone
D) Rarefaction
B) Puretone