ChinaAutoRegs\uff5cGB\/T 20247-2006 \u82f1\u6587\u7248\/English\/\u7ffb\u8bd1\/\u9053\u58f0\u5b66 \u6df7\u54cd\u5ba4\u5438\u58f0\u6d4b\u91cf
\nAcoustics – Measurement of Sound Absorption in a Reverberation Room<\/p>\n
\n1 SCOPE<\/p>\n
This Standard specifies a method of measuring the sound absorption coefficient of acoustical materials used as wall or ceiling treatments, or the equivalent sound absorption area of objects, such as furniture, persons or space absorbers, in a reverberation room. It is not intended to be used for measuring the absorption characteristics of weakly damped resonators.
\nThe results obtained can be used for comparison purposes and for design calculation with respect to room acoustics and noise control.<\/p>\n
2 NORMATIVE REFERENCES<\/p>\n
The following standards contain provisions which through reference in this text, constitute provisions of this Standard. For dated references, subsequent amendments (corrigenda excluded) to, or revisions of, any of these publications do not apply. However, parties to agreements based on this Standard are encouraged to investigate the possibility of applying the most recent editions of the Standards indicated below. For undated references, the latest edition of the applicable Standards referred to apply.
\nGB\/T 3240-1982 Preferred Frequencies for the Acoustical Measurement
\nGB\/T 3241 Octave-band and Fractional-octave-band Filters (GB\/T 3241-1998, eqv IEC 61260:1995)
\nGB\/T 17247.1 Acoustics–Attenuation of Sound during Propagation Outdoors–Part 1: Calculation of the Absorption of Sound by the Atmosphere (GB\/T 17247. 1-2000, eqv ISO 9613-1:1993)<\/p>\n
3 TERMS AND DEFINITIONS<\/p>\n
For the purposes of this Standard, the following terms and definitions apply.<\/p>\n
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\n2\u3001\u4e0b\u5355\u524d\u53ef\u4efb\u53d6\u6837\u9875\u9a8c\u8bc1\u8bd1\u6587\u8d28\u91cf\u3002
\n3\u3001\u514d\u8d39\u63d0\u4f9b\u6b63\u89c4\u666e\u901a\u589e\u503c\u7a0e\u6570\u7535\u53d1\u7968\u3002
\n4\u3001\u8bf7\u8054\u7cfb\u624b\u673a\/\u5fae\u4fe1: 13306496964\/Email: standardtrans@foxmail.com \u83b7\u53d6\u5b8c\u6574\u8bd1\u6587\u3002
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\n6\u3001\u4e13\u4e1a\u6e90\u4e8e\u4e13\u6ce8|ChinaAutoRegs \u59cb\u7ec8\u4e13\u6ce8\u4e8e\u6c7d\u8f66\u6807\u51c6\u7ffb\u8bd1\u9886\u57df\uff01
\n7\u3001\u300c\u4e2d\u56fd\u6c7d\u8f66\u6807\u51c6\u8bd1\u6587\u5e93\u300d\u5df2\u6536\u5f55\u4e0a\u5343\u4e2a\u73b0\u884c\u6c7d\u8f66\u56fd\u5bb6\u6807\u51c6\u548c\u884c\u4e1a\u6807\u51c6\u7684\u82f1\u6587\u7248\u8bd1\u672c\uff0c\u6db5\u76d6\u4f20\u7edf\u71c3\u6cb9\u8f66\u3001\u65b0\u80fd\u6e90\u6c7d\u8f66\u548c\u6469\u6258\u8f66\u6807\u51c6\u5316\u4f53\u7cfb\uff01\u72ec\u5bb6\u6253\u9020\u5343\u4e07\u7ea7\u6c7d\u8f66\u4e13\u4e1a\u672f\u8bed\u5e93\u548c\u8bb0\u5fc6\u5e93\u3002<\/p>\n
1. The English Translation of this document is readily available, and delivered immediately upon payment.
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ChinaAutoRegs\uff5cGB\/T 20247-2006 \u82f1\u6587\u7248\/Englis … \u7ee7\u7eed\u9605\u8bfb