For instance you mean the audible hum of a mains transformer? I had a turntable once from a well known audio mfr - the background mechanical hum was appalling.
Never seen a standard for it though........ Chris From: [email protected] [mailto:[email protected]] On Behalf Of Carpentier Kristiaan Sent: 25 April 2008 09:51 To: EMC-PSTC Subject: Standards for accoustic noise Hi group, Products with transformers sometimes produce noise due to fact that parts of the transformer are not fixed well or due to piezo-electric effect. The acoustic level is rather low but can be annoying. Can anyone point me to standards that describe this kind of acoustic measurements and limits? Vriendelijke groeten, meilleures salutations, mit freundlichen Gruessen, best regards, Kristiaan Carpentier Regulatory & Approvals Thomson Telecom Belgium Prins Boudewijnlaan 47 B-2650 Edegem Tel.: +32 3 443 6407 Fax: +32 3 443 6632 E-mail: [email protected] - 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 This message (including any attachments) may contain confidential information intended for a specific individual and purpose. If you are not the intended recipient, delete this message. If you are not the intended recipient, disclosing, copying, distributing, or taking any action based on this message is strictly prohibited. - 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
