Tuned-port rigid baffle panel for drum type percussion instrumen

Details Tuned-port rigid baffle panel for drum type percussion instrumen Tuned-port rigid baffle panel for drum type percussion instrumen

1990-05-18

1992-03-17

Brown, Brian W.

Music

Instruments

Drums

181156, G10D 1302

Patent

active

050957961

ABSTRACT:
A tuned-port rigid baffle panel which mounts to the side opposite the beater drumhead membrane side of acoustic drums and is used by musicians to enhance the live acoustic sound of these drum type percussion instruments by adding low-frequency punch to their performance. This low-frequency response enhancement is achieved by treating the drum as a bass-reflex enclosure and tuning the port of the rigid baffle panel to the appropriate percentage of the free-air resonant frequency of the beater drumhead membrane in order to control the peak amplitude of the beater drumhead membrane at resonance and extend the low-frequency response of the acoustic drum.

REFERENCES:
patent: 4146111 (1979-03-01), Mae et al.
patent: 4742753 (1988-05-01), Speed
patent: 4790228 (1988-12-01), Thirion
patent: 4805514 (1989-02-01), Billings
Weems, "A Second Life for Vented Speakers", Popular Electronics, Jan. 1980.
Boyce, "Hi-Fi Stereo Handbook", (Chap. 7) (1978).
Cohen, "Hi-Fi Loudspeakers and Enclosures", (2nd ed) (Chap. 9) (1968).

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