Sound reinforcement system having an echo suppressor and...

Details Sound reinforcement system having an echo suppressor and... Sound reinforcement system having an echo suppressor and...

2006-05-30

2006-05-30

Swerdlow, Daniel (Department: 2646)

Electrical audio signal processing systems and devices

One-way audio signal program distribution

Public address system

C381S066000, C381S093000

Reexamination Certificate

active

07054451

ABSTRACT:
A sound reinforcement system includes several microphones, a microphone beamformer coupled to the microphones, adaptive echo compensator (EC) coupled to the microphone beamformer for generating an echo compensated microphone signal, and several loudspeakers coupled to the adaptive EC. An adaptive loudspeaker beamformer is coupled between the adaptive EC and the loudspeakers for shaping the directional pattern of the loudspeakers. The adaptive loudspeaker beamformer creates a beam pattern which is capable of creating a “null” in the direction of speaker(s) such that howling is effectively prevented.

REFERENCES:
patent: 5677987 (1997-10-01), Seki et al.
patent: 5768398 (1998-06-01), Janse et al.
patent: 5771440 (1998-06-01), Sukhu et al.
patent: 6535609 (2003-03-01), Finn et al.
patent: 11055784 (1999-02-01), None
JPO Machine Translation of JP 11 055784 A.

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