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by: methylatedmartyr January 30, 2013 9:58 AM PST

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Strange noise from speakers

by methylatedmartyr - 1/30/13 9:58 AM

There's a strange noise coming from my speakers most similar to the sound a bat makes. I'm curious to know what could cause this. I've included a small sound clip. Thanks for any feedback guys!

http://www.wikiupload.com/89S3CCT381UJJ8H

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Answer Best answer as chosen by user methylatedmartyr

Sounds like hum and noise to me.

by R. Proffitt Moderator - 1/30/13 10:05 AM

In Reply to: Strange noise from speakers by methylatedmartyr

I've heard that since my first stereo. Take almost any amplifier and with no input crank up the volume and you usually can hear that noise. Some say it's from The Big Bang. Most of the time it's just the (electrical) noise around us and in the amplifier.

http://www.xprt.net/~rcrowley/tvcaudio/humnoise.htm and thousands of web articles are available.

Bob


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thanks for the reply

by methylatedmartyr - 1/30/13 3:06 PM

In Reply to: Sounds like hum and noise to me. by R. Proffitt Moderator

I understand the hum which to some degree just seems to be a fact of life, but the fast clicking, "tsst" noise is what has me confused.


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I understand.

by R. Proffitt Moderator - 1/30/13 3:13 PM

In Reply to: thanks for the reply by methylatedmartyr

But with all the people that have WiFi and it's bursty transmission method, all bets are off if that can get into our audio gear.
Bob


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interesting

by methylatedmartyr - 1/30/13 3:28 PM

In Reply to: I understand. by R. Proffitt Moderator

you make an interesting point! i notice that this problem has greatly intensified in the last few days, which is exactly when i set up a wifi connection. before it was bearable. i think i should try a comparison with the wifi turned on vs turned off. thanks for the insight.


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Thoughts. A tip.

by R. Proffitt Moderator - 1/30/13 5:07 PM

In Reply to: interesting by methylatedmartyr

As any wired connections can pick these up and pipe it into our audio realm, my favorite connection today is OPTICAL also known as TosLink among other names. So far no RF signal can get into that cable. Well, that is until you emit enough power to light up the air itself.
Bob


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Answer Best answer as chosen by user methylatedmartyr

Working with open input amplifiers.

by mjd420nova - 1/31/13 5:45 PM

In Reply to: Strange noise from speakers by methylatedmartyr

More than one set of speakers has been know to pick up CB and police calls. A little hiss and clicking can be traced to wire sheilding, both within and outside the amplifier. The other sounds can be a light switch in the house, a welder down the block or even a cosmic gamma ray striking a transistor substrate. Sheilding is essential for both input and output but speakers wires are not normally sheilded. Keeping speaker wires away from all power lines, cords, or even non conduit Romex in the walls. A little repositioning of wires while listening may reveal a bad connection or tow and some movement would allow you to search for null points.


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