--- Steve Underwood <[EMAIL PROTECTED]> wrote: > > > A power spectrum plot will tell him he has a 60Hz hum. I think he > already knows that. I think he can definitely consider solutions > without > following your suggestion. :-)
No, It's not a "60Hz hum". Yes, 60Hz is getting into the line but the existing filters are removing the 60hz. What he hears is most likely 120Hz, 240Hz or something else or most likely a combination of various multiples for 60hz. I'd bet that the tiny speaker inside a telephone handset can not even reproduce a 60Hz tome. Yes you can hear a hum but it's the overtomes of 60 that you hear. Many people can not even hear down to 60Hz, some can but not everyone. If you were to design a filter wouldn't it be nice to know some thing about the noise? Is there a big peak at 360? how broad is that paek 5hz or 20hz? I would expect the power spectrum of a "hum" to have multiple peaks. ===== Chris Albertson Home: 310-376-1029 [EMAIL PROTECTED] Cell: 310-990-7550 Office: 310-336-5189 [EMAIL PROTECTED] KG6OMK __________________________________ Do you Yahoo!? Yahoo! Mail SpamGuard - Read only the mail you want. http://antispam.yahoo.com/tools _______________________________________________ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
