BART P BILLINGS
Psychologist in Carlsbad, CA
License number
Pennsylvania PS003747L
Category
Psychology
Type
Psychologist
Address
Address
2
Carlsbad, CA 92009
Pennsylvania
Pennsylvania
Professional information
Hemispherical Speaker System
US Patent:
5889876, Mar 30, 1999
Filed:
May 1, 1997
Appl. No.:
8/847021
Inventors:
Bart P. Billings - Carlsbad CA
International Classification:
H04R 2500
US Classification:
381342
Abstract:
A speaker system of a plurality of speakers in a hemispherically directed array, includes a housing having a front, a back and a chamber, the back defined by a plane, and the front defined by a plurality of horns, each horn having a hyperboloid configuration and equally spaced around and from one another in a hemispherical array and directed outward from a common point on the plane, and each of the horns having an apex and a focal point, and a transducer of a first frequency range mounted at the apex thereof. An alternative includes a transducer of a higher frequency mounted at the focal point thereof.