Acoustics – Sound-modifying means – Sound absorbing fence or screen
Patent
1978-02-27
1979-05-29
Hix, L. T.
Acoustics
Sound-modifying means
Sound absorbing fence or screen
181286, 181288, 181292, 104124, 105452, G10K 1100, E04H 1700
Patent
active
041564766
ABSTRACT:
A noise control device which produces behind it an enlarged sound reducing region is disclosed. The device comprises a hollow structural body composed of a plurality of elongate hollow passages which are different in length and constructed such that the passage length is made the longest at a substantially center part in a vertical direction and is made gradually shorter from the center part toward upper and lower edges of the hollow structural body. The upper and lower edges allow direct propagation sound emitted from a noise source to pass thereover and therethrough.
REFERENCES:
patent: 3113634 (1963-12-01), Watters
Iida Kazuyoshi
Katayama Tomonori
Kondo Yoshikazu
Matsumoto Masayasu
Mizuno Keiichiro
Bridgestone Tire Company Limited
Fuller Benjamin R.
Hix L. T,.
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