Method for optimizing the design of a finite noise barrier

Details Method for optimizing the design of a finite noise barrier Method for optimizing the design of a finite noise barrier

1981-05-18

1983-11-22

Malzahn, David H.

Boots, shoes, and leggings

181296, 367901, G06F 1531

Patent

active

044173130

ABSTRACT:
A method for optimizing the design of finite noise barriers by using an extension of the Biot-Tolstoy rigorous closed form impulse solution for diffraction of an acoustic pressure pulse by an infinite rigid wedge. An initial finite barrier is defined and then a calculation made of the impulse signal transmitted on one side of the barrier and received on the other side by adapting the Biot-Tolstoy solution to a digital computer. The integrals of the acoustic pressure impulse are calculated for each source/receiver path for each segment of the barrier. The integrals are then compared and the segments are adjusted and new calculations made until all integral contributions are equal. The integrals are then digitally Fourier transformed to determine attenuation at the desired frequencies. After comparison with the desired attenuation, all segments are proportionately adjusted and the entire computational process reiterated until the optimal attenuation is achieved.

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Nakajima et al., "New Instrument for Rapid & Accurate Measurement of Ultrasonic Velocity & Attenuation Using a Minicomputer System" Japanese J. of Applied Physics, vol. 18, No. 7, Jul. 1979, pp. 1379-1385.

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