
BS EN ISO 3745. Acoustics. Determination of sound power levels of noise sources using sound pressure. Precision methods for anechoic and semi-anechoic rooms
出版:British Standards Institution

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BS EN ISO 3745. Acoustics. Determination of sound power levels of noise sources using sound pressure. Precision methods for anechoic and semi-anechoic rooms
出版:British Standards Institution
专家解读视频