Acoustic diode

Details Acoustic diode Acoustic diode

1985-10-02

1986-10-21

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310324, 310328, 310326, 310800, H01L 4108

Patent

active

046187960

ABSTRACT:
A sonic transmitter has placed in front of it or in its acoustic beam path, an acoustic diode comprising at least two peripherally secured foils in mutual contact, the foils having opposed surfaces with a degree of adhesion and/or cohesion such that they may be pulled apart beyond a threshold value which may be acted upon--of negative sound pressure thus suppressing negative sound pulses, whereas positive sound pressures may be transmitted at almost unaltered levels in view of the existing mechanical contact of the foils.

REFERENCES:
patent: 3894198 (1975-07-01), Murayama et al.
patent: 3975599 (1976-08-01), Johanson
patent: 4156800 (1979-05-01), Sear et al.
patent: 4186323 (1980-01-01), Cragg et al.
patent: 4196792 (1980-04-01), Grieves et al.
patent: 4211950 (1980-07-01), Roos
patent: 4427912 (1984-01-01), Bui et al.
patent: 4453044 (1984-06-01), Murphy
patent: 4469920 (1984-09-01), Murphy

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