水声反声材料 underwater acoustic reflection material ; marine acoustic reflecting material
反映群众呼声 to voice public concern
声反馈扬声器 acoustic feedback speaker
声反射 acoustic reflex ; acoustic reflection
声反馈 [声] acoustic feedback ; howl round
声反射罩 [声] [建] acoustic reflection shell
反对声明 statement of objections
反驳声明 counterstatement
声反射率 [声] acoustic reflectivity ; sound reflectivity
以往建筑声学图解法，只能解决特殊位置反声板的声波反射问题。
The former graphic method applied in architectural acoustics can only solve the problem of the reflecting sound wave with the sound reflecting board in special positions.
介绍了聚氨酯材料的水声特性，并重点评述了聚氨酯水声吸声材料、水声透声材料和水声反声材料的研究进展。
The underwater acoustic properties of polyurethanes were introduced. The recent research progress of underwater acoustic materials of polyurethanes was reviewed.
目前被动声探测距离精度还不能满足跟踪的需要，因此，反直升机智能雷对目标的跟踪问题归结为仅有角测量的跟踪问题。
Tracking target by using anti-helicopter mine (AHM) is actually the bearing-only measurement because precision of range detected by passive acoustic measurement cant satisfy the need of tracking.
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