消音器の音響減衰測定方法について

書誌事項

タイトル別名
  • ON MEASUREMENT METHODS OF SOUND ATTENUATION OF SILENCERS
  • ショウオンキ ノ オンキョウ ゲンスイ ソクテイ ホウホウ ニ ツイテ

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抄録

Measurement methods of sound attenuation of silencers are studied to determine data for sound attenuation design of air conditioning systems. Measurement methods of sound attenuation of silencers are standardized in IS0 7235. A large non-reflection termination is needed in this standard. But laboratories with this termination are few in Japan. So in this paper, for suggesting simple and practical measurement methods, several measurement methods (includes that of IS0 7235) are compared and discussed. A substitution method and a direct method are described. A non-reflection termination based on ISO and that of simple type are used in measurement methods.

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