GB/T 9069-2008Determination of sound power level for noise emitted by reciprocating pump - Engineering method (English PDF)

Foreword

This standard is GB/T 9069-1988 "reciprocating pump sound power levels - Engineering method" amendments.

This standard compared with GB/T 9069-1988, the main changes are as follows.

--- Sound Power in the test method standard sound source (comparison), increasing the mobile microphone test method for determining noise reverberation room Determination of sound power level;

--- Original standard D multi-point test method Appendix to reference.

The Standard Appendix B, Appendix C are normative appendices, Appendix A, Appendix D is an informative annex.

From the date of implementation of this standard instead of GB/T 9069-1988. The standard proposed by China Machinery Industry Federation.

1 Scope

This standard specifies a reflection on the next plane free-field conditions sound power level of engineering assays and reverberation room sound power Level engineering assay. Determination of this standard reverberation room sound power level of the sound source using standard mobile microphone comparison test method, Multi-point test method, see Appendix A.

This standard applies to the determination of sound power levels include a prime mover including a reciprocating pump unit (hereinafter referred to as pump units).

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.

GB 3102.7 acoustic quantity and unit (GB 3102.7-1993, eqv ISO 31-7:1992)

GB/T 3241 octave and fractional octave filters Determination of noise sources GB/T 3767 sound pressure of sound power levels reflecting plane free field engineering method (GB/T 3767-1996, eqv ISO 3744:1994)

GB electric, acoustic performance and test methods 3785 Sound Level Meter

GB/T 3947 Acoustics Terminology

GB/T 6881.2 Determination of sound pressure Part 1 reverberant field of sound power levels of noise sources for small, movable sources engineering methods Score. hard walled test rooms comparative method (GB/T 6881.2-2002, ISO 3743-1:1994, IDT)

GB /Determination of sound power levels of noise sources reverberant field for small, movable sources Engineering Method 2 T 6881.3 sound pressure Part 2. Reverberation chamber method (GB/T 6881.3-2002, ISO 3743-2:1994, IDT)

JJG176 acoustic calibrator verification procedures JJG188 sound level meter verification procedures JJG277 sound source standard test procedures

IEC 61183 Electroacoustics - sound level meter shot without predetermined sound field and diffuse sound field correction

3 Terms and Definitions

GB/T 3947 and GB 3102.7 established terms and definitions apply to this standard. […]

4 Determination of the amount required to error and measurement