TIS 1952-1999 High fidelity audio equipment and systems minimum performance requirements part 1 general《高保真音响设备和系统 最低性能要求 第1部分 总则》.pdf

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DIN IEC 60914-1990 Conference systems electrical and audio requirements identical with IEC 60914 1988《电话会议电气及音响设备要求》.pdf

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IEC 60581-1-1977 High fidelity audio equipment and systems Minimum performance requirements Part 1 General《高保真音响设备和系统 最低性能要求 第1部分 总则》.pdf

IEC 60581-5-1981 High fidelity audio equipment and systems Minimum performance requirements Part 5 Microphones《高保真音响设备和系统 最低性能要求 第5部分 传声器》.pdf

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