A new measuring method of displacement by means of variations of sound frequency and the length of air column in a small pipe. Theoretical analysis by means of electrical analogous circuit and velocity distribution.

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  • 管内空気柱の音響周波数変化を利用した変位の精密測定　等価回路と流速分布による理論解析
  • カンナイ クウキ チュウ ノ オンキョウ シュウハスウ ヘンカ オ リヨウシタ

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A new measuring method of displacement by means of variations of sound frequency and length of the air column in a closed resonant pipe has been investigated. This paper deals with the theoretical analysis of this device as a small and closed edge instrument (for example, a dog training whistle or a closed organ pipe). The electrical analogous circuit of a closed edge instrument was introduced for theoretical analysis. In the calculation, the velocity distribution of blown air on the mouth of the instrument was adopted. The results of the calculation of theoretical equations and experiments coincide significantly.

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