Unusual Noise

**foosman** · 05-03-2008

Yesterday I was sitting in my car writing down processor preset settings with the volume off and my cell phone sitting in the passenger seat. All the sudden, you know the noise your computer makes just prior to getting a call if your cell is too close to your monitor? Well, the same thing happened in my car. I assure you, at any other time you can play a zero noise track at full volume and hear nothing. I'm mystified about this. Any ideas?? I even got my home phone and called my cell trying to duplicate this and no luck. Can't afford this to happen at Finals or something dumb like that. Lets hear some feedback. Thank, Foos

txbonds · 05-03-2008

Quote:

Originally Posted by foosman 100

Yesterday I was sitting in my car writing down processor preset settings with the volume off and my cell phone sitting in the passenger seat. All the sudden, you know the noise your computer makes just prior to getting a call if your cell is too close to your monitor? Well, the same thing happened in my car. I assure you, at any other time you can play a zero noise track at full volume and hear nothing. I'm mystified about this. Any ideas?? I even got my home phone and called my cell trying to duplicate this and no luck. Can't afford this to happen at Finals or something dumb like that. Lets hear some feedback. Thank, Foos

Dumb reply, but you could just cut the phone off during judging at finals.

Mine and my wifes phones have done that before both at home, on the computer and in the car. Don't know what causes it.

**foosman** · 05-03-2008

Of course my phone will be off, but how do you assure that others will be? I'm really curious about this phenomenon. It had the VC's in my subs buzzing with no volume.

Genxx · 05-03-2008

See if this helps you understand what is happening.

http://electronics.howstuffworks.com/question230.htm

Genxx · 05-03-2008

If this does not help I will try to explian it. It is the same stuff we have to deal with when working with our Military Signal Systems. It gets into Signal Theory and stuff. Not even sure I could explian this in-depth over the interwebz.

**foosman** · 05-03-2008

Very informative. Thank you.

**doitor** · 05-03-2008

That also happens in my car when the cell is too close to the HU.
But it's not only and Alpine thing, it has happened with almost every car I've had with several different HU's, even stock ones.
Just keep your cell away from you HU and you should be OK.

Jorge.

05-03-2008	#1 (permalink)
foosman DiyMA Seperatist Join Date: Oct 2007 Location: Arlington, Texas Age: 51 Posts: 696 iTrader: (6)	Unusual Noise Yesterday I was sitting in my car writing down processor preset settings with the volume off and my cell phone sitting in the passenger seat. All the sudden, you know the noise your computer makes just prior to getting a call if your cell is too close to your monitor? Well, the same thing happened in my car. I assure you, at any other time you can play a zero noise track at full volume and hear nothing. I'm mystified about this. Any ideas?? I even got my home phone and called my cell trying to duplicate this and no luck. Can't afford this to happen at Finals or something dumb like that. Lets hear some feedback. Thank, Foos
	W205,H701,Audison LRx5.1k,Audison LRx2.9, Hybrid Audio Legatia L841,(2)Hertz HX 300 (soon to change back to a trunk) TEAM HYBRIDS Certified USACi SQ Sound Judge "It's hard to be a perfectionist when you don't know what the hell you are doing."

05-03-2008	#3 (permalink)
foosman DiyMA Seperatist Join Date: Oct 2007 Location: Arlington, Texas Age: 51 Posts: 696 iTrader: (6)	Re: Unusual Noise Of course my phone will be off, but how do you assure that others will be? I'm really curious about this phenomenon. It had the VC's in my subs buzzing with no volume.
	W205,H701,Audison LRx5.1k,Audison LRx2.9, Hybrid Audio Legatia L841,(2)Hertz HX 300 (soon to change back to a trunk) TEAM HYBRIDS Certified USACi SQ Sound Judge "It's hard to be a perfectionist when you don't know what the hell you are doing."

05-03-2008	#4 (permalink)
Genxx DIYMA Enthusiast Join Date: Mar 2007 Location: Duncan, OK Posts: 1,998 iTrader: (10)	Re: Unusual Noise See if this helps you understand what is happening. http://electronics.howstuffworks.com/question230.htm
	'99 Prelude-8544, Zapco DC200.2 x 2, DC1000.4 x 2, DC350.2, DC360.4, Hertz Mille, IDQ

05-03-2008	#5 (permalink)
Genxx DIYMA Enthusiast Join Date: Mar 2007 Location: Duncan, OK Posts: 1,998 iTrader: (10)	Re: Unusual Noise If this does not help I will try to explian it. It is the same stuff we have to deal with when working with our Military Signal Systems. It gets into Signal Theory and stuff. Not even sure I could explian this in-depth over the interwebz.
	'99 Prelude-8544, Zapco DC200.2 x 2, DC1000.4 x 2, DC350.2, DC360.4, Hertz Mille, IDQ

05-03-2008	#6 (permalink)
foosman DiyMA Seperatist Join Date: Oct 2007 Location: Arlington, Texas Age: 51 Posts: 696 iTrader: (6)	Re: Unusual Noise Very informative. Thank you.
	W205,H701,Audison LRx5.1k,Audison LRx2.9, Hybrid Audio Legatia L841,(2)Hertz HX 300 (soon to change back to a trunk) TEAM HYBRIDS Certified USACi SQ Sound Judge "It's hard to be a perfectionist when you don't know what the hell you are doing."

05-03-2008	#7 (permalink)
doitor Just Me Join Date: Aug 2007 Location: Mexico Age: 31 Posts: 1,553 iTrader: (8)	Re: Unusual Noise That also happens in my car when the cell is too close to the HU. But it's not only and Alpine thing, it has happened with almost every car I've had with several different HU's, even stock ones. Just keep your cell away from you HU and you should be OK. Jorge.
	Team Hybrids Alpine W505/H900 - HAT Legatia L841-3 - (5) JL Audio Slash amps - (2) JL Audio 12w6v2 subs My "Hybrid" CX-7

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