標(biāo)題: ASTM E 1050-1998 管子,雙擴音器和數(shù)字頻率分析系統(tǒng)用傳... [打印本頁] 作者: 兌水 時間: 2009-11-4 07:41 標(biāo)題: ASTM E 1050-1998 管子,雙擴音器和數(shù)字頻率分析系統(tǒng)用傳... E1050-98 Standard Test Method for Impedance and Absorption of Acoustical Materials Using a Tube, Two Microphones, and a Digital Frequency Analysis System