Acoustical ducting for speakers and enclosures

Details Acoustical ducting for speakers and enclosures Acoustical ducting for speakers and enclosures

1980-09-15

1986-10-21

Fuller, Benjamin R.

Acoustics

Diaphragm and enclosure

181153, 181156, 181199, H05K 500

Patent

active

046180257

ABSTRACT:
In an acoustical speaker having a movable diaphragm responsive over a range of frequencies, an air duct having a cross-sectional area less than that of the diaphragm substantially surrounding the diaphragm and in communication with one side thereof for acoustically isolating the diaphragm, dampening low-frequency ringing and acoustically loading the diaphragm for extending the frequency range to lower frequencies to enhance the performance of the speaker with small speaker enclosures. One embodiment provides for similar ducting for passive radiator diaphragms.

REFERENCES:
patent: 2295483 (1942-09-01), Knowles
patent: 2512323 (1950-06-01), Gersch
patent: 2713396 (1955-07-01), Tavares
patent: 3385393 (1968-05-01), Gold
patent: 3978941 (1976-09-01), Siebert
patent: 4031318 (1977-06-01), Pitre

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