GSM interfering with powered stereo speakers

Archived from groups: alt.cellular.cingular (More info?)

For the past month or so, I've been getting odd noise effects from my
speakers: Car, home stereo and computer. I was finally able to pin
the pattern down.

It started happening when I first got a Cingular GSM phone, and it only
happens when the phone is on. It happens when the phone is turning on,
turning off, or connecting for making or receiving a call, and
semi-random times while the phone is on. It only happens when the
speakers are on, and the volume/mute controls on the effected tuner/amp
effect the volume of the induced noise.

Does anyone know why this happens, and if there is any solution short
of replacing everything?

--
Jeffrey Kaplan www.gordol.org
The from userid is killfiled Send personal mail to gordol

"This is a possible future Commander, and it is my hope that you may
yet avoid it." (Lady Ladira, B5 "Signs and Portents" )

Archived from groups: alt.cellular.cingular (More info?)

Joseph wrote:
> On Sat, 02 Jul 2005 19:00:34 -0400, Jeffrey Kaplan <cing@gordol.org>
> wrote:
>
>
>>For the past month or so, I've been getting odd noise effects from my
>>speakers: Car, home stereo and computer. I was finally able to pin
>>the pattern down.
>>
>>It started happening when I first got a Cingular GSM phone, and it only
>>happens when the phone is on. It happens when the phone is turning on,
>>turning off, or connecting for making or receiving a call, and
>>semi-random times while the phone is on. It only happens when the
>>speakers are on, and the volume/mute controls on the effected tuner/amp
>>effect the volume of the induced noise.
>>
>>Does anyone know why this happens, and if there is any solution short
>>of replacing everything?
>
>
> There's really nothing you can do since the tinga-tinga-buzz-buzz-buzz
> is what you get when a GSM handset gets near any unshielded device
> such as a speaker or even near regular telephones with electret type
> microphones. You won't get that with carbon granule transmitter
> phones. With TDMA near speakers instead of getting the
> tinga-tina-buzz-buzz-buzz you get a low toned buzz. To my knowlege
> you don't get this with CDMA, but you do with GSM and "TDMA" aka
> IS-136. You'll only get the buzzing as you said when the phone is
> turned on, initiating a call or about to ring. You might get the
> occasional burst of noise if for some reason the phone has to check
> with the network. Bottom line is if you stay with GSM or TDMA you're
> going to have noise on your speakers and other unshielded audio
> devices. And the only thing you could really replace is your phone
> service with cingular and go with a CDMA carrier. All GSM/TDMA
> providers have this trait.
>
> - -
>


....or replace any speaker wires with shielded cables.


--
jer
email reply - I am not a 'ten'

Archived from groups: alt.cellular.cingular (More info?)

It is alleged that Jer claimed:

; ...or replace any speaker wires with shielded cables.

Actually, iirc, the speakers in my living room are fed by shielded
cables. I'd have to double-check. But that doesn't help me wrt my
computer or car.

Guess I'll just live with it.

--
Jeffrey Kaplan www.gordol.org
The from userid is killfiled Send personal mail to gordol

"I won't bite, Vir." "With all due respect, madam. That's not what
I've heard." "all right, that +one+ time." "It was twice." (Timov
and Vir Coto, B5 "Soul Mates" )

Archived from groups: alt.cellular.cingular (More info?)

Foil won't do anything, except maybe for those MLB spy
satellites (do you line your headgear, just in case?).
Don't believe me? Put a magnet on one side of your foil
and your TV screen on the other. Sure, go ahead and
solder in your "coax". As anyone who knows how to spell
experiment knows, you've failed. Back to the drawing
board. Look up mu-metal. And for goodness sakes, wear
goggles! Or just turn off your phone, which has nothing
to do with the "shielding" of shielded loudspeakers.

J- [Sun, 03 Jul 2005 07:52:40 -0500]:
>protect CRT systems from a speaker's magnetic field. If a speaker
>enclosure isn't shielded, one can remedy that by lining the interior
>cabinet surface with aluminum foil, and connecting that to the coaxial
>shield.

--
40th Floor - Software @ http://40th.com/
iPlay : the ultimate audio player for mobiles
mp3,mp4,m4a,aac,ogg,flac,wav,play & record
parametric eq, xfeed, reverb; all on a mobile

Archived from groups: alt.cellular.cingular (More info?)

"Center channel" loudspeakers are made to be put on a TV.
You may as well claim you don't receive any MLB spy
satellite transmissions when you wear your tinfoil cap.
That may be true; I wouldn't know. As for the foil acting
as a barrier to any kind of magnet, that is not true.

J- [Sun, 03 Jul 2005 14:40:05 -0500]:
>then the foil I added to the inside of my center channel
>speaker cabinet..., is a >failure? Interesting hypothesis.

But not a terribly interesting story anyway. It has
nothing to do with the thread topic, either.
--
40th Floor - Software @ http://40th.com/
iPlay : the ultimate audio player for mobiles
mp3,mp4,m4a,aac,ogg,flac,wav,play & record
parametric eq, xfeed, reverb; all on a mobile

Archived from groups: alt.cellular.cingular (More info?)

"Jer" <gdunn@airmail.ten> wrote in message
news:11cfnsp8q96b274@corp.supernews.com...
> Jeffrey Kaplan wrote:
>> It is alleged that Jer claimed:
>>
>> ; ...or replace any speaker wires with shielded cables.
>>
>> Actually, iirc, the speakers in my living room are fed by shielded
>> cables. I'd have to double-check. But that doesn't help me wrt my
>> computer or car.
>>
>> Guess I'll just live with it.
>>
>
>
> Most home theater and PC speakers are already shielded in this manner to
> protect CRT systems from a speaker's magnetic field. If a speaker
> enclosure isn't shielded, one can remedy that by lining the interior
> cabinet surface with aluminum foil, and connecting that to the coaxial
> shield.
>
> Here, all the speakers are connected via shielded cables - on the theater
> equipment in the rec room and the PC here in the office - due to the
> hi-powered CB radios so prevalent around here. Mind you, not all speaker
> enclosures are shielded, so there's still a minor risk there (see above),
> but the majority of the problem is with the wiring in walls and under
> carpet. The cabling for each speaker has the + and - wires enclosed
> within a coaxial shield, with the shield on the supply end connected to
> earth bond. Yes, I still hear it in the car, but trying to create a
> hi-end sound system there is expensive with dubious value, so I've let
> that go.
>
> --
> jer
> email reply - I am not a 'ten'

Who would buy cheap, unshielded speakers for a sound system?

Archived from groups: alt.cellular.cingular (More info?)

It is alleged that Morgan Goose claimed:

; the frequency at which gsm phones operate (850-1900 mhz) resonates at an
; approx. dimention of modt wires. just move your phone away from the music
; box.

Not possible. Each area where this happens places me no more than 8
feet away from a speaker, and I'm already as far from them as the space
or circumstance allows.

My only real options are shielding or live with it.

--
Jeffrey Kaplan www.gordol.org
The from userid is killfiled Send personal mail to gordol

"And after spending a day dealing with Amb. G'Kar, I long to sink my
teeth into something..." (Amb. Londo, B5 "Born to the Purple" )