Sound barrier with oblique surfaces

Details Sound barrier with oblique surfaces Sound barrier with oblique surfaces

1994-06-09

1995-11-28

Dang, Khanh

Acoustics

Sound-modifying means

Sound absorbing fence or screen

E04H 1700

Patent

active

054699320

ABSTRACT:
A sound barrier partition (22) having multiple faces (30) covering a vertical wall (24) of the partition (22) that fronts a highway. The faces (30) on each partition (22) are of sufficient size and shape to effectively reflect most of the frequencies of sound generated by highway traffic and heard by the human ear. Sound barriers are usually installed on both sides of a highway. The faces (30) are positioned obliquely so that a ray (R) of sound will strike face (30) at a high angle of incidence and be reflected at a higher angle above the horizontal. When sound rays travel a substantial distance above the top edge of the corresponding barrier on the opposite side of the highway, the amount of audible sound that is diffracted and refracted towards inhabited areas adjacent to the highway is reduced.

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Rettinger, Michael--"Acoustics", 1968 Chemical Publishing Co, Inc. p. 125 Table Band-pressure . . . p. 207, Fig. 61.
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Lipscomb, Taylor--"Noise Control--Handbook of Principles and Practices", 1978 Van Nostrand Inc. p. 268 Fig. 10-6, p. 269 Fig. 10-7.

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