1) echo board
回声屏<声>
3) acoustic shielding
声屏蔽(声)
4) absorbent lined barrier
吸声屏障<声>
5) absorbing sound barrier
吸声声屏障
1.
Noise reduction efficiencies of straight-type and incline-type absorbing sound barriers along railway were measured and comparatively analyzed.
通过对铁路直立型与内倾型吸声声屏障的实际降噪效果测试与对比分析,得出声屏障对800~3500 Hz频带范围内的铁路噪声插入损失最为明显,约为12~20 dB(A);内倾型声屏障的降噪量比直立型声屏障高4~6 dB(A)。
6) magnetic echo
磁回声[声]
补充资料：屏屏
1.层叠貌。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条