[国外标准] JIS C1509-2-2005 Electroacoustics-Sound level meters-Part 2：Pattern evaluation tests
[国外标准] JIS C1509-1-2005 Electroacoustitcs-Sound level meters-Part 1：Specifications
[国外标准] ASTM F2154-01(R2007) SOUND-ABSORBING BOARD, FIBROUS GLASS, PERFORATED FIBROUS GLASS CLOTH FACED