System of sound transducers with controllable directional...

Details System of sound transducers with controllable directional... System of sound transducers with controllable directional...

2008-03-11

2008-03-11

Mei, Xu (Department: 2615)

Electrical audio signal processing systems and devices

One-way audio signal program distribution

Multiple channel

C381S082000, C381S335000, C181S144000

Reexamination Certificate

active

10363839

ABSTRACT:
The invention relates to loudspeaker systems or loudspeaker columns as used in public address systems and at (pop) concerts. Such systems heretofore possess a frequency-dependent coverage angle and strong second and third order side lobes. The invention describes formulae of the voltage to be applied to the separate loudspeakers of the loudspeaker column, which makes it possible to realize the constant coverage angle over the entire frequency range and to suppress the side lobes to a far-reaching extent.

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D. Keele, Jr., “Effective Performance of Bessel Arrays”, J. Audio Eng. Soc., vol. 38, No. 10, Oct. 1990, pp. 723-748.

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