Active noise control using an array of plate radiators and acous

Details Active noise control using an array of plate radiators and acous Active noise control using an array of plate radiators and acous

1994-12-19

1997-01-07

Barefoot, Galen L.

Aeronautics and astronautics

Miscellaneous

381 71, 181206, G10K 1116, F01D 526

Patent

active

055908497

ABSTRACT:
An active noise control subassembly array for reducing noise caused by a source (such as an aircraft engine). A pair of subassemblies each has a piezoceramic-driven noise radiating panel to generate a panel noise canceling at least some of the source noise. A front plate is spaced apart from the panel and has a sound exit port. A first pair of spaced-apart side walls each generally abuts the panel and the front plate so as to generally enclose a front cavity to define a resonator. A back plate is spaced apart from the panel by a second pair of side walls. The pair of subassemblies are spaced apart to create a space between their adjacent side walls. A third subassembly is similar to the pair of subassemblies but may have a different resonant frequency and is positioned such that the back plates of the subassembly pair serve as the front plate of the third subassembly with the space between the subassembly pair serving as the sound exit port of the third subassembly.

REFERENCES:
patent: 1688743 (1928-10-01), Nicolson
patent: 4551849 (1985-11-01), Kasai et al.
patent: 4700177 (1987-10-01), Nakashima et al.
patent: 4715559 (1987-12-01), Fuller
patent: 4751419 (1988-06-01), Takahata
patent: 4947434 (1990-08-01), Ito
patent: 5031222 (1991-07-01), Takaya
patent: 5370340 (1994-12-01), Pla
Concurrently filed U.S. Patent application RD-23664, Frederic G. Pla, entitled "Noise Control Using A Plate Radiator And An Acoustic Resonator".
Concurrently filed U.S. Patent application RD-23317, Frederic G. Pla et al., entitled "Active Noise Control Using A Tunable Plate Radiator".
U.S. patent application Serial No. 08/143,602, filed Nov. 1, 1993, Frederic G. Pla et al., entitled "Active Noise Control Using Noise Source Having Adaptive Resonant Frequency Tuning Through Stiffness Variation".
U.S. Patent application Serial No. 08/143,605, filed Nov. 1, 1993, Frederic G. Pla et al., entitled "Active Noise Control Using Noise Source Having Adaptive Resonant Frequency Tuning Through Stress Variation".
U.S. Patent application Serial No. 08/143,604, filed Nov. 1, 1993, Frederic G. Pla et al., entitled "Active Noise Control Using Noise Source Having Adaptive Resonant Frequency Tuning Through Variable Panel Loading".
U.S. Patent application Serial No. 08/143,603, filed Nov. 1, 1993, Frederic G. Pla et al., entitled "Active Noise Control Using Noise Source Having Adaptive Resonant Frequency Tuning Through Variable Ring Loading".
See "Background of Invention" in present application.
U.S. Patent application RD-23528, Frederic G. Pla et al., entitled "Active Noise Control Of Aircraft Engine Discrete Tonal Noise" (filing receipt not yet received).

Affiliated with

Also associated with

Rating

Active noise control using an array of plate radiators and acous does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Active noise control using an array of plate radiators and acous, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Active noise control using an array of plate radiators and acous will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1758543