吸音材料；音响材料

acoustical tile───吸声砖；隔音砖

acoustical tiles───吸声砖；隔音砖

dialectical materialism───n.辩证唯物主义

dialectical materialist───辩证唯物主义者

genetic materials───[遗]遗传物质；基因材料

source materials───原始资源

historical materialism───历史唯物主义；历史唯物论

In addition to manufacturing, they are a supplier of acoustical materials, acoustical products, and acoustical supplies.───除了生产外，公司还供应隔音材料，隔音制品和隔音用的生活用品等。

Sound absorption materials is always used in controlling reverberation time in the acoustical design of studios.───演播厅混响时间的控制，在声学设计上往往通过安装吸声材料来实现。

Test Method for Impedance and Absorption of Acoustical Materials Using a Tube, Two Microphones and a Digital Frequency Analysis System───管子、双扩音器和数字频率分析系统用传声材料的阻抗和吸收的试验方法

Measurement of the longitudinal wave velocity and attenuation for underwater acoustical materials--Pulse-tube method───水声材料纵波声速和衰减的测量脉冲管法

Broadband measurement of sound insulation for underwater acoustical materials───水声材料宽带隔声测试方法研究

Test Method for Impedance and Absorption of Acoustical Materials by the Impedance Tube Method───用阻尼管法测定吸音材料的阻尼与吸音性的试验方法

Standard Test Method for Impedance and Absorption of Acoustical Materials by Impedance Tube Method───用阻尼管法测定隔音材料的阻尼与吸音性的试验方法

Standard Test Method for Airflow Resistance of Acoustical Materials───吸音材料的气流阻力器的试验方法