Structure for decreasing low frequency air vibration

Details Structure for decreasing low frequency air vibration Structure for decreasing low frequency air vibration

1982-02-26

1984-05-29

Fuller, Benjamin R.

Acoustics

Sound-modifying means

Housing or enclosure

181175, 181210, 181284, A47B 8106, G10K 1100

Patent

active

044509316

ABSTRACT:
A structure for decreasing low frequency air vibrations, comprising a sound insulating floor, sound insulating sidewalls and a sound absorbing ceiling arranged so as to form an air chamber below and separate from the underside of an elevated road or railway bridge's traversed surface, thereby forming a space between the sound absorbing ceiling and the elevated bridge. The structure is very effective for decreasing the low frequency air vibration emanating from the structure of the elevated bridge and the low frequency air vibrations transmitted from the structural supports of the elevated bridge.

REFERENCES:
patent: 3881569 (1975-05-01), Evans, Jr.
patent: 4142468 (1979-03-01), Birnstiel

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