Horn loudspeaker with acoustic lens

Details Horn loudspeaker with acoustic lens Horn loudspeaker with acoustic lens

1978-05-03

1979-08-14

Stellar, George G.

Acoustics

Anatomic or prosthetic relation

Ear and mouth

181176, 181191, H04R 120, H04R 906

Patent

active

041646312

ABSTRACT:
A moving coil loudspeaker of the type including a pair of co-axial speech coils, one for driving a high frequency diaphragm at the rear of the loudspeaker to provide an output along a horn and the other for driving a cone forming a continuation of the horn and reproducing the lower frequencies has an acoustic lens fitted in the region where the horn contour is taken over by the cone, the lens being shaped over its external surface so as to conform snugly with the contour of the cone and being effective to increase the divergence of the beam of acoustic radiation from the horn in the operative plane of the lens. The acoustic lens is preferably so designed that the divergence of the acoustic beam from the horn matches that from the cone and may be of the slant-type, being held by a cruciform mounting extending across the mouth of the horn proper.

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