
BS EN ISO 389-3 - ACOUSTICS - REFERENCE ZERO FOR THE CALIBRATION OF AUDIOMETRIC EQUIPMENT - PART 3: REFERENCE EQUIVALENT THRESHOLD FORCE LEVELS FOR PURE TONES AND BONE VIBRATORS
出版:British Standards Institution

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BS EN ISO 389-3 - ACOUSTICS - REFERENCE ZERO FOR THE CALIBRATION OF AUDIOMETRIC EQUIPMENT - PART 3: REFERENCE EQUIVALENT THRESHOLD FORCE LEVELS FOR PURE TONES AND BONE VIBRATORS
出版:British Standards Institution
专家解读视频