墙内，回声在彩色的拱门之内，马厩与储藏室之间回响。
Within them, sounds echoed off arches of many-colored bricks, and amongst the stables, stalls, and storerooms.
因此本论文利用回声实验室做天线效率评估，开发出两版回声实验室。
Therefore, this thesis attempts to develop reverberation chambers to evaluate antenna's efficiency.
回顾了实验室中超声波测量Q值的四种常用方法：上升时间法、回声法、频谱振比法和波形反演法。
The four common ultrasonic methods for measuring Q value in the laboratory, rise time, pulse echo, spectral ration and waveform inversion techniques are reviewed.
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