Automatic audiometer system

Details Automatic audiometer system Automatic audiometer system

1977-12-22

1978-08-15

Brown, Thomas W.

H04R 2900

Patent

active

041074653

ABSTRACT:
An audiometer for testing the hearing characteristic of a person. The audiometer is entirely operable by the user whereby technicians are not required. The audiometer comprises a source of audible and selectable fixed frequency signals. An automatic frequency selector switch selects a predetermined frequency signal from the source. A variable attenuator circuit is provided to automatically attenuate, in sequence, the predetermined frequency through a plurality of attenuation levels and according to a preselected mode of operation whereby to transmit a plurality of attenuated frequency signals. The attenuated frequency signals are transmitted for audible reception by the person using the audiometer. Visual display lamps indicate the test frequencies and attenuation, permitting the user to fill out a test chart on corresponding sounds audible to his ears. A control circuit is provided to enable the frequency selector means and the variable attenuator in accordance with a preselected mode of operation.

REFERENCES:
patent: 3809811 (1974-05-01), Delisle
patent: 4038496 (1977-07-01), Feezor

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