This layer contributes to improve the acoustic characteristics of the indoor Spaces, while sieved sunlight coming through the window area.

这层条板有利于提高室内空间听觉效果，同时过滤由窗口进入的阳光。

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With improved BP network, Adopting deep, short resistivity, and acoustic logging, the model to recognize oil layer and water flooded layer is established.

利用改进的BP算法，采用深、浅侧向电阻率、声波时差测井建立了油层、水淹层的识别模型。

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The main results indicate that in boundary layer the stable layers observed by acoustic radar echos correspond fairly to synoptic systems.

结果表明：声雷达回波所反映的稳定层和天气系统之间有较好的对应。

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That work showed acoustic invisibility in a shallow layer of water, at ultrasound frequencies above those we can hear.

BBC: Acoustic 'cloaking device' shields objects from sound