Acoustic projector for propagating a low dispersion sound field

Details Acoustic projector for propagating a low dispersion sound field Acoustic projector for propagating a low dispersion sound field

2011-03-22

2011-03-22

Chin, Vivian (Department: 2614)

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Having acoustic wave modifying structure

C381S337000, C381S352000, C381S339000, C381S075000, C381S077000, C381S387000, C181S191000, C181S175000

Reexamination Certificate

active

07912234

ABSTRACT:
A broadband sound generator and transmitter provides minimal attenuation of sound over the distance between the generators and a point at a selected distance. The transmission component includes a parabolic dish and a positionable framework for the sound generators. The sound generators are positioned in front of the dish and oriented to direct sound into the dish for reflection toward a target. Drive signal conditioning circuitry apportion components of the drive signal to the several sound generators and adjust the signal in terms of delay and phase to accommodate changes in position of the generators relative to the dish.

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American Technology Corporation, LRAD Long Range Acoustic Device, Publication Date 2003.

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