Sound device provided with a geometric and electronic...

Details Sound device provided with a geometric and electronic... Sound device provided with a geometric and electronic...

2005-03-11

2008-09-16

Chin, Vivian (Department: 2615)

Electrical audio signal processing systems and devices

One-way audio signal program distribution

Public address system

C381S089000, C381S336000, C381S339000, C381S182000

Reexamination Certificate

active

07426278

ABSTRACT:
A sound device for carrying out a homogenous sound cover for a public addressed area includes an electroacoustic source network (1), wherein each electroacoustic source (1) diffuses a version delayed by a delay (3), filtered by a filter (4) and amplified by the device input signal amplifier (5). The network is substantially rectilinear and vertical, angles θ which are formed by the emitting axes of the electroacoustic sources (1) and a normal to the network are selected such that θn>θn−1, wherein n is the index of the electroacoustic sources (1) numbered in ascending order from the top of the device to the bottom thereof and the delays (3) interact with the angles θ in such a way that the device generates a wavefront (6) whose shape corresponds to the desired sound cover of the public addressed area.

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patent: 5781645 (1998-07-01), Beale
patent: 6128395 (2000-10-01), De Vries
patent: 6628796 (2003-09-01), Adamson
patent: 7027605 (2006-04-01), Werner
patent: 2004/0240697 (2004-12-01), Keele
patent: 1 187 094 (2002-03-01), None
Mark S. Ureda: “Wave Field Synthesis with Horn Arrays” Audio Engineering Society, Preprint No. 4144, May 14, 1996, XP002302358.
Evert W. Start: “Application of Curved Arrays in Wave Field Synthesis” Audio Engineering Society, Preprint No. 4143, May 14, 1996, XP002302359.

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