The result is important for solving the problems of the bad repeatability and low measurement accuracy in the structure sound insulation measurements. 對解決結構隔聲測試方法中聲源信號可重復性差，測試結果精確度不高的問(wèn)題具有重要意義。
It was described and validated the ultrasonic system with a line-focused PVDF transducer for the measurement of the elastic constants of small-size samples. 摘要介紹了針對小試件材料力學(xué)性能測試的特殊需求而設計的超聲精密測量系統和測試方法，并進(jìn)行了實(shí)驗驗證。
