Volume 6, Number 4, December, 1998 - Noise News International

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SOUND THROUGH CONNECTIONS MUST BE BLOCKED Vibration isolation of a machine may be ineffective if sound is transferred through connections for oil, electricity, water, etc. These connections must be made very flexible. Principle : ~ ". " , --' ::... '. , " , · . · .' " , " , . , .' J • ',' / / / pipeline from machine flexible connection · '.-: :~' , : ~. -'-'----------_--:;/._------------------' 218 NoiseJNews International 1998December
Application to machines with connections for utilities. Example Cooling systems may be major sources of noise as a result of intense pressure shocks in the liquid from compressors. Great care must be given to vibration isolation. Control Measure Compressors may be vibration isolated with steel springs. In addition, flexible connections should be used for all inlet and discharge pipes. low pressure line, reinforced rubber tubing high pressure line, flexible metal tubing steel springs 1998 December NoiseJNews International 219
Page 1 and 2: Volume 6, Number 4 1998 December IN
Page 3 and 4: Editorial Stllff G. Maling, Jr., Ma
Page 5 and 6: Anechoic Chambers with EMW lining T
Page 7 and 8: "Finally, an Outdoor Sound Propagat
Page 9 and 10: YOUR NEXT SOUND METER • Workplace
Page 11 and 12: Feature Noise Control Standards for
Page 13 and 14: specify in more detail relevant mea
Page 15 and 16: c: o .~ "E f---7""'lf-1I:-i~;J4'.--
Page 17 and 18: References 1. Council Directive 89/
Page 19 and 20: Feature Advances in Acoustical Stan
Page 21 and 22: (a) M 4 6:~f=========::::CI~ Fig. 3
Page 23 and 24: Adaptor for Microphone & Preamplifi
Page 25 and 26: the last twenty years and be ready
Page 27: CONTROL The illustrations in thisfe
Page 31 and 32: Application with a thin screen. Exa
Page 33 and 34: Application with light single walls
Page 35 and 36: European News A. Cops, European Edi
Page 37 and 38: Pan-American News George Maling, Pa
Page 39 and 40: Contest entry forms and other mater
Page 41 and 42: Newly published ISO and IEC Standar
Page 43 and 44: ACOUSTICS ANSI Sl.15-1997-Part 1, M
Page 45 and 46: NNI Directory Organizational and Ed
Page 47 and 48: ~----- REAL TIME ANALYSER APPLICATI
Page 49 and 50: Brazil: +55 II 8200388; +55 II 8207
Page 51 and 52: The BS-112 comes equipped with a 6-
Page 53 and 54: 518584 3754; FAX: +1 5185809525; e-
Page 55 and 56: World Conference Calendar This cale
Page 57 and 58: COLIN GORDON & ASSOCIATES Specializ
Page 59 and 60: The NewMo e 2 Real Tune Analyzer Fe

Volume 6, Number 4, December, 1998 - Noise News International

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