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Terms in this set (25)
T or F: Directionality cannot be implements in the smallest ITE devices.
True: however, you can use directionality in ITE HAs just NOT CICs
______ is a category by the FDA that is "not intended to compensate for impaired hearing, but rather is intended for non hearing impaired consumers to amplify sounds in the environment for a number of reasons. Such as recreational activities.
Personal Sound Amplification product (PSAP)
______ converts one form of energy to another- from acoustical to electrical energy.
transducer ex: microphone
the circuitry which manipulates the signal in a hearing aid has been referred to as the amplifier.
Digital Signal Processor
gain decreases as a function of increasing input
gain decreases as a function of decreasing input
output level-input level
conductive loss uses _____ processing
SNHL & everyone else uses _______ processing
how quickly is the gain being reduced as a function of the input level
as dynamic range gets smaller you expect your compression ratio to ______, to a point
change in input/ change in output
CR of 1:1
CR of 2:1
for every 10 dB increase, output level increases by 5 dB
CR of 5:1
for every 10 dB increase in input level, output level 2 dB
A region that will share the same compression parameters
Most individuals will benefit from _____ channel because different compression values are needed in different frequency regions.
Ability to change gain ONLY; can have multiple bands in one channel
how long it takes for the hearing aid to go into compression (how quickly a HA reacts to a changing input) (Typically short)
how long it takes for the hearing aid to come out of compression *Time varies depending on the goal.
If you have a high CT then you should have a ________CR
syllabic compression; squeeze more into DR; smaller speech banana; reduction in speech envelop cues; sound quality issues.
Short Release (fast acting compression)= 50-100ms
automatic volume control; minimizes impact on speech envelop cues; squeeze less into DR; height of speech banana maintained
Long release (slow acting) 200-500 ms
degree of plasticity _____ as you travel further up the auditory system.
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