Fitting the larger dynamic range of environmental sounds into the smaller dynamic range of a hearing-impaired listener is accomplished by this process.
What is amplitude compression?
100
As earmold vent size increases, the extent of the low-frequency cut of the amplification does this.
What is increases?
100
This process aims to provide less amplification to noise than to speech.
What is adaptive noise reduction?
100
This hearing aid style is least susceptible to wind noise.
What is a CIC?
100
This mimics the ear’s variation of impedance with frequency.
What is an ear simulator?
200
This term describes the time taken for the compressor to react to a increase in input level.
What is Attack Time?
200
This is the likely cause if a patient complains that their own voice sounds hollow or booming while wearing their earmold or shell.
What is the occlusion effect?
200
This process moves sections of the acoustic spectrum from higher to lower frequencies to improve audibility of certain speech sounds.
What is frequency lowering (or compression/transposition)?
200
This hearing aid style is reported to be the easiest to use in terms of manipulating controls.
What is a BTE?
200
This coupler is used in text box measures for ITE and ITC hearing aids.
What is an HA-1 coupler?
300
Which type of compression can help eliminate the need for a manual volume control?
What is Wide Dynamic Range Compression (WDRC)?
300
These are used to decrease gain and maximum output at the resonant frequencies in the sound bore.
What are dampers?
300
This feature stores information regarding the listening situations hearing aids are used in, how the patient adjusted the hearing aid in each situation, and how the hearing aid self-adjusted or activated signal processing features in the different situations.
What is data logging?
300
NAL-NL1 only requires this information about a patient to prescribe a fitting.
What are thresholds?
300
This is the equivalent of a coupler for bone conduction devices.
What is an artificial mastoid?
400
One rationale for using to compression is to avoid discomfort, damage, and this.
What is distortion?
400
To increase the maximum possible insertion gain before feedback oscillation occurs, you should do this to vent size.
What is decrease it?
400
This feature is the basis for automatically controlling microphone directionality, adaptive noise reduction, and wind noise reduction to suit current listening conditions.
What is environmental classification, or acoustic scene analysis?
400
LGOB stands for this:
What is Loudness Growth in half-Octave Bands?
400
These frequencies are measured to obtain the high frequency average gain according to ANSI S3.22.
What are 1000, 1600, and 2500 Hz?
500
Compression ratios greater than or equal to 8:1 are typically used for this signal processing?
What is output limiting?
500
Insertion gain in this frequency region is primarily affected by vent effects.
What is < 1500 Hz?
500
This signal processing scheme can reduce excessive low-frequency sound from the patient's own voice, allow for increased high-frequency gain before feedback by reducing or eliminating the need for a vent, and allow directional microphones and noise reduction to work over the full frequency range.
What active occlusion reduction?
500
This must be low enough to avoid discomfort, damage, and wasted output, but must be high enough to avoid inadequate loudness, distortion, and removal of intensity cues to speech?
What is OSPL-90?
500
Real-Ear-to-Coupler-Difference is calculated using this equation.