Part 2.1 Flashcards
The hole extending through the canal to the tubing connection or the receiver nub is the:
a) Bridge
b) Helix
c) Sound bore
d) Vent
e) Flare
c) Sound bore
Resistance to the transmission of sound is greatest for which frequencies?
a) High
b) Low
c) Medium
d) All
e) No
a) High
More waves, more chance to resist.
Smaller diameter sound bore tubing has the effect of:
a) Decreasing gain and output
b) Increasing gain and output
c) Assisting high frequency response
d) Reducing high frequency response
e) Both a and b
b) Increasing gain and output
Smaller tunnel, less traffic.
Modification of the hearing aid response can be provided by:
a) Tone controls
b) Tubing size
c) Earmold modification
d) Receiver inserts
e) All of the above
e) All of the above
That which is often thought of as an input transducer in reverse is the:
a) Vacuum tube
b) Receiver
c) Diaphragm
d) Electret microphone
e) Transistor
b) Receiver
Analyze the language.
Transistors, resistors, capacitors and switches comprise the:
a) Amplifier
b) Microphone
c) Receiver
d) Battery
e) Cell
a) Amplifier
When they say amplifier here they are merely saying ‘hearing aid.’
The part of the hearing aid which converts the electrical signal to an acoustical or vibratory output is the:
a) Microphone
b) Output transducer
c) Oscillator
d) Tone potentiometer
e) Amplifier
b) Output transducer
The function of an amplifier is to:
a) Convert acoustical to electrical energy
b) Convert electrical to acoustical energy
c) Increase the amplitude of the signal picked up by the microphone
d) Limit the MPO of the hearing aid
e) Act as the power supply of the hearing aid
c) Increase the amplitude of the signal picked up by the microphone
The function of an amplifier is to amplify.
Which component takes energy from a transducer by means of an induction pickup?
a) Microphone
b) Receiver
c) Bone-conduction vibrator
d) Amplifier
e) Telephone coil
e) Telephone coil
An inductor in its simplest form is a coil of wire
The level dependent frequency response ASP showing bass increasing at low levels is:
a) TILL
b) BILL
c) PILL
d) LDFR
e) Not enough information
b) BILL
Base Increasing at Low Levels.
TILL
Treble Increase at Low Levels (TILL),
Automatic signal-processing in hearing aids to increase amplification of high-frequency sounds gradually over that of low-intensity sounds.
LDFR and the types
Level Dependent Frequency Response
BILL
TILL
PILL
PILL
Programmable Increase at Low Levels
A condition in which a 5 dB gain occurs in the output of a hearing aid with an input of 10 dB is:
a) Corrosion
b) A dead aid
c) Compression
d) Distortion
e) Feedback
c) Compression
Another name for saturation is:
a) Compression
b) Overload
c) Out of bounds
d) Feedback
e) Distortion
b) Overload
