Transducer having two ducts

Details Transducer having two ducts Transducer having two ducts

1990-08-02

1992-05-19

Dwyer, James L.

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

381159, 381 88, 181156, H04R 2500, H04R 102, H05K 500

Patent

active

051154730

ABSTRACT:
The present invention relates to a so-called bass-reflex electroacoustic transducing apparatus, wherein a plurality of sound ducts (ports) having the same equivalent mass and different lengths are provided in communication with a housing which incorporates therein an electroacoustic transducing element. Thus, resonance and antiresonance generated in respective sound ducts cancel each other out, thereby preventing a tone quality of a reproduced sound from being deteriorated.

REFERENCES:
patent: 3777844 (1973-12-01), Johnson
patent: 4031318 (1977-06-01), Pitre
patent: 4742887 (1988-05-01), Yamagishi
patent: 4815546 (1989-10-01), Krnan

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