• Based on the principle of sound attenuation to measure the sediment concentration of suspensions, the attenuation value of sound pressure must be detected.

    基于衰减原理进行水体含沙量测量方法,需要测量声压的衰减

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  • The experiment showed that in the melon slices there were some points where the sound pressure attenuation coefficient were negative value or zero.

    实验表明额隆内有若干点声衰减负值及零值、意味着声波沿这些点传输时、声压非但不减小反而增大了。

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  • The experiment showed that in the melon slices there were some points where the sound pressure attenuation coefficient were negative value or zero.

    实验表明额隆内有若干点声衰减负值及零值、意味着声波沿这些点传输时、声压非但不减小反而增大了。

    youdao

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