In message <1f5308c5923f3b4daa51d189bf255006036b0...@edgmsmail01.eu.thmulti.com>, dated Fri, 25 Apr 2008, Carpentier Kristiaan <[email protected]> writes:
>The product is a Direct plug-in power supply, switched mode type. OK, there is a standard for how to measure the sound level: IEC 60478-4 Ed. 1.0 Bilingual Prices are quoted in Swiss Francs (CHF). Title: Stabilized power supplies, d.c. output. Part 4: Tests other than radio-frequency interference Publication date: 1976-01-01 Maintenance result date: 2007 SC: 22E - STABILIZED POWER SUPPLIES Media type & price: PDF: 3971Kb CHF 171 Hard Copy: 75 pages CHF 155 + P&P I'm not sure whether it includes any sort of limit. My own opinion is that an A-weighted sound level at 1 m of less than 30 dB would be undetectable by most people when the product is in use under normal ambient noise conditions. -- OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk Murphy's Law has now been officially re-named The Certainty Principle John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to [email protected] Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas [email protected] Mike Cantwell [email protected] For policy questions, send mail to: Jim Bacher: [email protected] David Heald: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
