Acoustics – Sound-modifying means – Sound absorbing fence or screen
Patent
1975-06-05
1977-09-27
Franklin, Lawrence R.
Acoustics
Sound-modifying means
Sound absorbing fence or screen
E04H 1700, E04B 182
Patent
active
040505383
ABSTRACT:
Noise reducing screen disposed between an elongated noise source formed by a motorway or a railway and a building located along one side of this noise source and to be shielded therefrom. This noise reducing screen comprises a continuous wall portion having a whole length 2d, built up between the elongated noise source and the building on both sides of a perpendicular drawn from the building point the most remote from the noise source and located at a distance D therefrom to the elongated noise source and a plurality of variably spaced apart posts aligned with said wall portion, these posts having a length a and a width b repectively parallel and perpendicular to the elongated source, the spacing between the n.sup.th and (n-1).sup.th post being at most equal to
REFERENCES:
patent: 3630310 (1971-12-01), Federer
patent: 3656576 (1972-04-01), Gubela
patent: 3783968 (1974-01-01), Derry
patent: 3812931 (1974-05-01), Hauskins
patent: 4015682 (1977-04-01), Keller
Michael Rettinger, Acoustic Design and Noise Control, Chemical Publishing Co. Inc., New York, 1973, pp. 332-339.
Cyril M. Harris, Handbook of Noise Control, McGraw-Hill Book Co. Inc., New York, 1957, pp. (2-4) - (2-6).
Ulrich J. Kurze, "Noise Reduction by Barriers", Journal of the Acoustical Society of America, vol. 55, No. 3, Mar. 1974, pp. 504-506.
Michael Rettinger, "Noise Level Reduction of `Depressed` Freeways", Noise Control, July 1959, pp. 12-14 & 54.
Franklin Lawrence R.
Societe d'Etudes Generales de Communications Industrielles et
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