有限音線積分法による室内音場の計算

概要

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In this paper, the program system using the finite sound ray integration method was extended to permit the calculation of echo-diagrams up to 300 ms even for the room shapes having more than 900 wall surfaces. From echodiagrams, acoustical criteria for liveness and spatial impression were derived for three auditoriums. The measured criteria and caluculated criteria were found to be high correlated. Not only the correlation coefficients of D ; R, C, RI and RR values were high, but also the calculated values closely approximated to the measured values. Successively, authors developed two different methods to simulate the attenuation by air absorption in the computer simulation system based on the finite sound ray integration. The first method was to convolute the air absorption for each and every sound ray. The second was to convolute the air absorption to the calculated impulse response corresponding to the arrival time of sound. The latter yielded the more practical results by the short calculation time.
社団法人日本建築学会の論文
1986-06-30