At 9:03 -0800 14/11/03, Peter L. Tarver wrote: >Thanks to the responders to my query. >
<SNIP> > >I know I must purchase some standards, but I'd like to >minimize the financial hit. I'd appreciate opinions >regarding these three standards in particular: > >EN ISO 4871:1996 [Acoustics - Declaration and verification >of noise emission values of machinery and equipment (ISO >4871:1996)] 26 Pages. You need this if you've never done any noise testing, but once you've looked at it a couple of times and got your standard report format laid out you'll probably never refer to it again. >EN ISO 9614-1:1995 [Acoustics - Determination of sound power >levels of noise sources using sound intensity - Part 1: >Measurement at discrete points (ISO 9614-1:1993)] > >EN ISO 9614-3:2002 [Acoustics – Determination of sound power >levels of noise sources using sound intensity – Part 3: >Precision method for measurement by scanning (ISO >9614-3:2002)] You need one or the other of these - not both since they describe different ways of doing the same job. These standards describe a mathematical procedure to allow you to calculate the sound power level from measurements of the sound pressure. In the context of the machinery directive you only need to do this if the equivalent continuous a-weighted sound pressure level at workstations exceeds 85dB(A). Otherwise, don't worry about it. [My contention is that any standard that claims to provide a "precision" method to measure sound level is having you on, but that's a separate argument.] >EN ISO 11688-1:1998 [Acoustics - Recommended practice for >the design of low-noise machinery and equipment - Part 1: >Planning (ISO.TR 11688-1:1995)] Useful, if you are actually having problems making your machinery quieter and don't know much about the topic. Otherwise, 40 pages of the bleedin' obvious. > > >Do I correctly interpret the title of EN ISO 11957:1996 >[Acoustics - Determination of sound insulation performance >of cabins - Laboratory and in situ measurements (ISO >11957:1996)] as applying to cranes, diggers and the like > I think this applies to an acoustic control cabin such as might be placed over a generator or compressor, but I may well be wrong. It's certainly not clear from the information on the BSI web site and I don't have a copy. > >As an aside, I am curious as to why EN ISO 12001: 1996 >[Acoustics - Noise emitted by machinery and equipment - >Rules for the drafting and presentation of a noise test code >(ISO 12001:1996)] is in the list of harmonized standards. >This looks like a standard for drafting health and safety >code requirements, though I may be misinterpreting the term >"test code." > You'd have to ask CEN or the Commission about that. Tip - buy the ISO standards on-line from the ISO web store. They are marginally more expensive but you get the vastly more convenient PDF versions and you can have them now rather than when the postal service decide to deliver them to you. Hope this is helpful. Regards Nick. This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: [email protected] Dave Heald: [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
