anechoic
adjective medical, physics specialized uk/ˌæn.ɪˈkəʊ.ɪk/ us/ˌæn.ɪˈkoʊ.ɪk/
无回声的
not able to send back an echo (= a sound that reflects off a surface)
The anechoic chamber is used to test microphone performance. 无回声的房间被用来测试话筒性能。
The ultrasound showed an anechoic mass located behind a normal bladder. 超声波显示在正常的膀胱后方有一个无回声的团块。
Those are lightweight building blocks made of some porous, anechoic material. 那些是轻质的建筑用砌块，用多孔无回声的材料制成。
Compare: echogenic
- More examples
- Experiments in anechoic chambers have shown errors of more than two to one when subjects were asked to estimate the distance of a sound source.
- To overcome these problems it was decided to record heart valve sounds under controlled conditions deep in an anechoic water tank, free from reverberation noise.
- In this study, 4 patients had an abnormal anechoic mass, 1 had an abnormal echogenic mass.
- The case presented in ultrasound studies as a large, solid, well-defined, heterogenous mass with anechoic areas.
- 12.5% of the nodes were anechoic.