Electroacoustical transducing

Details Electroacoustical transducing Electroacoustical transducing

1994-07-01

1999-03-30

Loomis, Paul

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Having acoustic wave modifying structure

381300, 381335, 381345, H04R 2500

Patent

active

058898751

ABSTRACT:
Electroacoustical apparatus includes according to one aspect structure for providing a sound field concentrated at a restricted listening region corresponding substantially to a human head while being spaced from the restricted listening region. According to another aspect an electroacoustical transducer is located at the interface of an acoustic waveguide and a ported enclosure.

REFERENCES:
patent: 3816672 (1974-06-01), Gefvert et al.
patent: 4075438 (1978-02-01), Kappel
patent: 4549631 (1985-10-01), Bose
patent: 4628528 (1986-12-01), Bose et al.
patent: 4641345 (1987-02-01), Takahashi
patent: 4868888 (1989-09-01), Dayton
patent: 4932060 (1990-06-01), Schreiber
patent: 5109416 (1992-04-01), Croft

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