论文部分内容阅读
双传声器法是工程上在线测量声衬声阻抗的重要方法,为解决实用声衬蜂窝尺寸过小而无法直接嵌入传声器的问题,本文设计了探针传声器,通过外径1.5 mm的探针将声衬表面和背腔声压信号引出。在对探针传声器进行严格校准后,应用双传声器法测量了共振腔和实用蜂窝夹层声衬的声阻抗,并与理论结果进行了对比分析。
Dual microphone method is an important method for on-line measurement of acoustic impedance of acoustic lining. To solve the problem that practical acoustic lining honeycomb is too small to fit directly into a microphone, a probe microphone is designed in this paper. Lining surface and back cavity sound pressure signal leads. After the probe microphones were calibrated strictly, the acoustic impedance of the resonant cavity and the practical honeycomb interlayer was measured by the double microphone method. The acoustic impedance was compared with the theoretical results.