
Bs En Iso 389-7:2005/Amd 1 - Acoustics - Reference Zero For The Calibration Of Audiometric Equipment - Part 7: Reference Threshold Of Hearing Under Free-Field And Diffuse-Field Listening Conditions
出版:British Standards Institution

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Bs En Iso 389-7:2005/Amd 1 - Acoustics - Reference Zero For The Calibration Of Audiometric Equipment - Part 7: Reference Threshold Of Hearing Under Free-Field And Diffuse-Field Listening Conditions
出版:British Standards Institution
专家解读视频