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並前往https://www.sciencedirect.com/topics/engineering/sound-absorption-coefficient

Sound Absorption Coefficient - an overview - Science Direct

c, Speed of sound, m/s. C, Heat capacity, J/K. E, Emissive power, W/m 2. f, Frequency, Hz. I, Intensity of radiation, W/sr. k, Thermal conductivity, W/mK.

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