System and method for eliminating audible noise for...

Details System and method for eliminating audible noise for... System and method for eliminating audible noise for...

2006-07-18

2006-07-18

Pihulic, Daniel (Department: 3662)

Communications, electrical: acoustic wave systems and devices

Transmitter systems

With beam forming, shaping, steering, or scanning

Reexamination Certificate

active

07079450

ABSTRACT:
Methods for reducing clicking of ultrasonic air-coupled transducers in which a mechanical filter that attenuates audible frequencies relative to ultrasonic frequencies is placed in the path of the ultrasonic waves as the travel from the transducer to a target such as an object in the vehicle compartment.

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patent: 6302857 (2001-10-01), Landeck
Influence of Pulse Drive Shape and Tuning on the Broadband Response of a Transducer, Ron McKeighen, Proc. IEEE Ultrasonics Symposium vol. 2, pp. 1637-1642, 1997.
The Design of Broadband and Efficient Acoustic Wave Transducers, C.H. Chou et al., 1980 Ultransonics Symposium, Nov. 4-7, 1980.

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