Extended frequency range Helmholtz resonators

Details Extended frequency range Helmholtz resonators Extended frequency range Helmholtz resonators

1988-03-14

1992-06-02

Isen, Forester W.

Electrical audio signal processing systems and devices

Acoustical noise or sound cancellation

Adjacent ear

G10K 1116

Patent

active

051194279

ABSTRACT:
Extended frequency range Helmholtz resonators particularly useful for sound absorption over a relatively wide frequency range are disclosed. The resonators are conventional Helmholtz resonators with the addition of an active acoustic driver in the resonator cavity driven at appropriate amplitudes, frequencies and phases to provide a high degree of absorption of sound not only at the resonant frequency of the resonator, but for substantial frequency bands above and below the resonant frequency. To provide the active drive to the acoustic driver in the resonant cavity, one or more microphones are used to detect the sound to be absorbed, which signal is processed and amplified to provide a drive to the acoustic driver to best absorb the incoming sound. Various embodiments are disclosed.

REFERENCES:
patent: 3826870 (1974-07-01), Wurm et al.
patent: 3936606 (1976-02-01), Wanke
patent: 4480333 (1984-10-01), Ross
patent: 4490841 (1984-12-01), Chaplin et al.
patent: 4527282 (1985-07-01), Chaplin et al.
patent: 4549289 (1985-10-01), Schwartz et al.
patent: 4594695 (1986-06-01), Garconnat et al.
patent: 4596033 (1986-06-01), Swinbanks
patent: 4653102 (1987-03-01), Hansen
patent: 4665549 (1987-05-01), Eriksson et al.
patent: 4677676 (1987-06-01), Eriksson

Affiliated with

Also associated with

Rating

Extended frequency range Helmholtz resonators does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Extended frequency range Helmholtz resonators, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Extended frequency range Helmholtz resonators will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2235772