Acoustic lens device

Details Acoustic lens device Acoustic lens device

1997-04-08

1998-12-15

Dang, Khanh

Acoustics

Sound-modifying means

181141, 181176, G10K 1100

Patent

active

058500600

ABSTRACT:
An acoustic lens device is provided for use in facilitating oral communication in a space which is acoustically challenged. The lens device includes at least one acoustic reflector for positioning proximate to a dashboard of a passenger portion of a transport vehicle. The reflector is formed by an upper portion with an ellipsoidal surface obtained when an ellipse having two foci on an axis extending in a substantially vertical direction is rotated about the axis. In consequence, the upper portion encloses at least one of the two foci such that each of the at least one reflectors is disposed at a predetermined distance from the other with parallel axes. The first loci is disposed such that voice signals emitted from the mouths of persons seated in the front passenger compartment are directed from the first foci to the device. Accordingly, a sound pressure of a voice signal reaches the axis of the at least one reflector and is focused by the device and directed to the second focus in the back passenger portion.

REFERENCES:
patent: 2643727 (1953-06-01), Leon
patent: 3908095 (1975-09-01), Jinsenji
patent: 5031220 (1991-07-01), Tagaki et al.
patent: 5268539 (1993-12-01), Ono

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