Tuned sound barriers

Details Tuned sound barriers Tuned sound barriers

1979-12-20

1983-02-15

Hix, L. T.

Acoustics

Sound-modifying means

Housing or enclosure

181208, 181286, 336100, H02K 524, F16F 700, G10K 1116, H01F 1502

Patent

active

043736084

ABSTRACT:
A tuned sound barrier for machines which radiate sound primarily at a few constant, discrete frequencies includes an array of mechanical resonators distributed over the surface of a sound barrier. Each resonator of the array is tuned to present a high mechanical impedance to transmission of mechanical vibration at one of the discrete frequencies emitted by the source machine. The tuned sound barrier may be either a free-standing sound barrier or an attachment to a housing for the machine.

REFERENCES:
patent: 1758808 (1930-05-01), Sersen et al.
patent: 2541159 (1951-02-01), Geiger
J. P. Den Hartog, Mechanical Vibrations, 4th Edition, New York: McGraw--Hill Book Co., Inc., (1956), pp. 87-93.

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