Music classrooms need to satisfy acoustical requirements of sound insulation and sound absorption.
音乐教室要同时满足隔音和吸音的声学要求。
Sound absorption and insulation is the acoustical characteristic of material. Measurement of sound absorption and insulation has an important significance in noise control and acoustical design.
吸声与隔声是材料的声学特性，吸声与隔声测量对噪声控制与声学设计具有重要意义。
The acoustical and communications engineer is concerned with the generation, transmission and absorption of sound.
声学和通信工程人员研究的问题涉及声音的产生、传播和吸收等。
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