Method and apparatus for measuring attack and release times of h

Details Method and apparatus for measuring attack and release times of h Method and apparatus for measuring attack and release times of h

1978-08-25

1980-03-04

Robinson, Thomas A.

179107R, H04R 2900

Patent

active

041918649

ABSTRACT:
At the option of an operator, the attack or release time of a hearing aid is automatically measured, and the measurement displayed in milliseconds on a digital readout. A test tone signal of constant frequency is successively cycled between relatively low and high power levels. During the first cycle of the test signal a sample is taken and stored which is representative of the steady state response of the hearing aid under test; and during the second cycle a measurement is automatically made of the time required for the output of the hearing aid to settle to within a predetermined recovery range about the stored sample signal.

REFERENCES:
patent: 3692959 (1972-09-01), Lamp
patent: 3922506 (1975-11-01), Frye
patent: 4049930 (1977-09-01), Fletcher et al.
patent: 4065647 (1977-12-01), Frye et al.
"Computerized Hearing Aid Testing", by Frye, Hearing Instruments for Feb. 1977, pp. 14 and 29.

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