Low reflection/low diffraction treatment for loudspeaker transdu

Details Low reflection/low diffraction treatment for loudspeaker transdu Low reflection/low diffraction treatment for loudspeaker transdu

1996-12-13

1999-11-23

Le, Huyen

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Electromagnetic

381426, 381354, 381182, H04R 2500

Patent

active

059914254

ABSTRACT:
An arrangement for minimizing acoustic reflections and diffraction from an exterior surface of a diaphragm of a loudspeaker transducer. A layer of highly optimized acoustic foam is applied to an exterior surface of the transducer diaphragm. The acoustic foam is a polyether urethane material of approximately 2 lb/ft.sup.3 density with a skinned bottom surface, optional skinned top surface and optimized cell size and structure. The foam is die cut into a shape to conform to the concave shape of the transducer diaphragm without large air gaps or deformation of the foam. The acoustic foam surface prevents reflection and diffraction of another transducer's output off of the diaphragm of the treated transducer and provides a low pass filtering of the acoustic output of the treated transducer.

REFERENCES:
patent: 2763333 (1956-09-01), Schumann
patent: 3268030 (1966-08-01), Magnus
patent: 3967065 (1976-06-01), Ward
patent: 4163876 (1979-08-01), Ohnuki
patent: 4296280 (1981-10-01), Richie
patent: 4478309 (1984-10-01), Kawamura et al.
patent: 4497981 (1985-02-01), House
patent: 4569076 (1986-02-01), Holman
patent: 5448647 (1995-09-01), Koizumi
patent: 5570429 (1996-10-01), Paddock
patent: 5608810 (1997-03-01), Hall
TEAC Manual, "The Sierra Series," ST-X5, TEAC Corporation of America, 7733 Telegraph Road, Montebello, CA 90640.
Peerless 1" Dome Tweeter.
Peerless 6 1/2" Woofer.
Sony, "Technical Design Concepts and Philosophy of the SS-M9 Loudspeaker," 1994 Sony Electronics Inc.
E.A.R. Technical Data Sheet TDS-09, Division, Cabot Safety Corporation, Delaware Industrial Park, Newark, DE 19713.

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