acoustic shadow
释义
声影区；
英英释义
Acoustic shadow
An acoustic shadow is an area through which sound waves fail to propagate, due to topographical obstructions or disruption of the waves via phenomena such as wind currents. As one website refers to it, "an acoustic shadow is to sound what a mirage is to light".
以上来源于:Wikipedia
权威例句
Keeping the Lid On: A Gulf War RetrospectiveReal-time multi-media information and communications system
Sound pick-up system for guitars or other stringed instruments
acoustic shadow
Lack of an acoustic shadow on scans of gallstones: a possible artifact.
Acoustic shadow zones in the horizontal plane
Emergency ultrasound: out of the acoustic shadows.
An automatic geometrical and statistical method to detect acoustic shadows in intraoperative ultrasound brain images.
Can acoustic shadows identify fish species? A novel application of imaging sonar data
Effects of upper ocean sound-speed structure on deep acoustic shadow-zone arrivals at 500- and 1000-km range
1. They noticed that acoustic waves were being generated along the edges of the moon's shadow, in a part of Earth's upper atmosphere known as the ionosphere.
他们注意到，在地球高层里称为电离层的那部分大气中，在沿着月球阴影的边缘上产生了声波。
youdao
2. Results Among 21 cases presented hyperechogenic on ultrasonography. There were 18 cases with acoustic shadow and all calculi moved as position changed.
结果在21例睾丸鞘膜腔内结石的超声表现中，21例均为强光团，18例后伴声影，21例强光团均可移动。
youdao
3. Conclusion The major characteristics of calculi in the cavity of perididymis on ultrasonography are hyperechogenic with acoustic shadow and calculi moved as position changed.
结论强光团、后伴声影、可移动是睾丸鞘膜腔内结石的主要超声征像。
youdao
4. When a sound source lies to one side of the head, the ear on the opposite side lies within the head's acoustic shadow.
当声源位于头部的一侧，另一侧的耳朵在头部的声影。
youdao
5. When a sound source lies to one side of the head, the ear on the opposite side lies within the head's acoustic shadow.
当声源位于头部的一侧，另一侧的耳朵在头部的声影。
youdao
acoustic shadow
