Noise reducing resonator apparatus

Details Noise reducing resonator apparatus Noise reducing resonator apparatus

1977-07-05

1979-04-17

Godici, Nicholas P.

Acoustics

Sound-modifying means

Sound absorbing panels

181295, G10K 1110

Patent

active

041496124

ABSTRACT:
The present noise reducing apparatus includes resonators which have a small and variable volume as well as a high admittance. For this purpose the resonators constitute vibrating systems having at least one volume wherein the pressure is reduced below atmospheric pressure to provide a reduced volume stiffness. The volume is confined by wall elements having a very small or a negative spring rate under reduced pressure inside said volume.

REFERENCES:
patent: 2153357 (1939-04-01), Wente
patent: 2502017 (1950-03-01), Beers
patent: 2502018 (1950-03-01), Olson
patent: 2502019 (1950-03-01), Olson
patent: 2840179 (1958-06-01), Junger
patent: 3117575 (1964-01-01), Carrell

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