発光ダイオードを用いた音場の可視化測定方法

概要

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This paper describes the sound visualization method, some results visualized actually and the comparison of the graphic expression method of the sound pressure level distribution by X-Y plotter with the photographical one. This sound visualization method is based on an idea that the beams from three colored light emitting diodes are recorded photographically on a film, which go on and off in sequence every time the sound pressure level changes by 5 dB. The actual measurement of the distribution of sound pressure level can be performed with the sound visualizing device built as a trial according to the idea. The summary of the result is ; The directivity of a sound source and the properties of the sound field, such as the distribution of sound pressure level or sound diffraction can be grasped quantitatively and clearly by the sound visualization method. Furthermore, the photographic result of the sound pressure level distribution can be obtained in more detail and a shorter time as compared with the graphic one.
一般社団法人日本機械学会の論文
1985-01-25