Abnormal sound detecting apparatus

Details Abnormal sound detecting apparatus Abnormal sound detecting apparatus

1993-05-03

1997-02-11

Chilcot, Richard

Measuring and testing

Vibration

Sensing apparatus

73649, G01H 1106

Patent

active

056023375

ABSTRACT:
An abnormal sound detecting apparatus is disclosed which has an acoustoelectric conversion element for converting an acoustic pressure into an electrical signal, two amplifiers for amplifying the electrical signal from the acoustoelectric conversion element, two volume controllers provided at the input sides of the two amplifiers and for controlling the electrical signal from the acoustoelectric conversion element, a change-over switch for changeably supplying the electrical signal from the acoustoelectric conversion element to the two amplifiers through the two volume controllers, respectively, and a stereophonic head phone for receiving the output signals from the two amplifiers to convert the same to sound.

REFERENCES:
patent: 3365935 (1968-01-01), Kane
patent: 4583405 (1986-04-01), Simmons
patent: 4991439 (1991-02-01), Betts
patent: 5041989 (1991-08-01), Kataoka et al.

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