That Crazy GSM Buzz

Wirelessly posted (Walkguru's: LG-CU500 Obigo/WAP2.0 Profile/MIDP-2.0 Configuration/CLDC-1.1 UP.Link/6.3.0.0.0)

Hey ive grown quite fond of that buzz.

 

Good article, and it does explain it in plain english. I wonder what they are looking at to help the shielding issue?

As for being use to it, I am also use to it now. Every now & then when the dispatcher talks, you can here it over the 2 way radio, luckily it hasn't caused a problem on any calls.

 

What... you didn't like the explanation I posted a while back, right here on WA?
http://forums.wirelessadvisor.com/general-wireless-discussion/54900-gsm-tdma-and-cdma.html


I am crushed...:crying:

 

I agree, the Scrumhalf's post does not come up easily in a search. You may be a newbie here, but you come well prepared -- what with the wand and everything BTW, welcome!

 

that buzz is the only reason that when i am home i switch my phone over to 3G...

 

I kind of like it too - as I can tell when I'm getting ready to get a message!! :biggrin:

Too - something happens like clockwork at 25 and 55 after the hour - makes me feel "connected".

 

That's how I always know when I'm getting a message in my car, it makes my iPod transmitter go nutso...

~*Ash*~

 

i miss the GSM buzz...........my Tmo phone had a buzz...........my Boost/Nextel phone had this weird buzz that was more annoying than the regular cell buzz (think clicking tv white noise).........Sprint and Verizon i dont think have the pretty clickies........... :crying:

 

iDEN interference sounds like one of those old airplanes in the cartoons when they are running out of gas.

I've heard the GSM buzz when I call Cingular Customer Care. I guess coming from the reps phone.

 

When I worked at a Call Center I'd have that happen a few times, and if the customer commented, I'd be like "Hmm... I don't hear it." to try to make them think it was on their end... And it always worked.

~*Ash*~

 

I believe BlackBerry issued a patent on technology that would shield the phone from producing the BUZZ feeling ...

Get a UMTS phone and that should (hopefully) get rid of the buzz noise. iDEN (Nextel) is modified GSM, so it will buzz too.

 

thats a pretty good description

 

From the article linked in the original post:

LOL! This guy must have some cheap electronics around. I sit in front of my desk at work every morning and the buzzing is not a problem at all. The only way I can get some buzz in my computer speakers is if I purposedly place it very very close to them, about a few inches. The desk phone acts the same way within a few inches of my phone. Other than that, when I am wearing it in my pouch or while talking, I get no buzzing on my speakers. In my car it's a bit tricky because if the cassette adapter wire is within 2 or 3 inches from the phone, they will route the buzzing into the car radio and hence it will come out from the speakers. But as long as that wire is placed properly, I get no interference at all in my car. The same thing in my home computer. I have to sometimes put the phone almost touching the speaker to get any buzzing.

The only weird place is in my living room home theater system. It will pick up the GSM buzz even from the kitchen which is about 20 feet across! and it is very loud. That tells you that poorly shielded electronics are the cause. I have another (more expensive) home theater system in my bedroom and I have to make a significant effort to make it pick up any interference. The phone needs to almost touch the amplifier at the right spot, otherwise it won't pick up any interference.

The most annoying of all is when using some wired headsets. Whenever the phone switches to 1900Mhz, the buzz can get loud during the conversation and even the person in the other end can hear it. That's why I only use Bluetooth.

 

I too get the most interference out of speakers at work, which are the little plastic things Dell used to throw in a few years ago. They are shielded enough not to affect the monitor, but apparently not enough to handle the pulsating of the phone.

 

Me too! It lets me know when I've got a text message, picture message or incoming call before my phone alerts me to this. I can interpret the different sounds to know what I've got.

Am I weird?

 

I do get it on my computer speakers when the phone is within 2-5 feet, otherwise I don't, and I have been lucky & never had it come over my Home theater speakers, even when my daughter puts her phone on charge next to 1 of them.

My Nextel does give a horrible sound that makes the GSM buzz sound plesant, but again it has to be near the speakers to cause the problem.

 

You are not wierd, because I can do the same thing & it can be neat to know just prior to the phone ringing that something is coming in.

And maybe that's what they should call it, and early call warning "Feature"

 

I'm with you guys. I too can detect what's going to happen by the sound of the buzz... and I honestly think if it were gone one day, I'd really miss it...

~*Ash*~

 

Hey Scrum,

For what it's worth I do like your explanation better...
actually to be a little more specific, I think it has to do with the
SDCCH channel that your hearing. That's why you can hear when your about to rcv a call, or an SMS, as that's all signalling that is done over the SDCCH channel. The periodic buzz every 55 minutes or so (varies depending on operator's network settings) is your phone doing what's called A Periodic Location Update which is signalling also done over the SDCCH channel.
The "constant" Buzz, while in a call must obviously be the actual dedicated Traffic Channel.

If you were to break down all the GSM TDMA channels, their bit rates, etc, you'd notice the SDCCH will as you said produce modulation at a rate that is in the audible range...and crummy shielding will certainly allow faraday to do his magic.

I don't know how I ever passed Differential Equations (DIFF EQ)...Seems like a blurr since
we went over Fourier Transforms, etc... "whoda thunk" you'd ever use it...

 

Of course not! You're just gifted!

 

You're right... good clarification!

And yes, I learned Laplace transforms and Fourier transforms in my sophomore year as a EE major... the techniques are so powerful and elegant.. I've never really forgotten much of it even though it has been 22 years!

 

I am sure his post has a better "Technical" explination, but for us non-techies , the OP's helps.
Between the 2 everyone is covered pretty decent on the plain & technical explination.

 

Like was said it all depends on the sheilding of the elctronics. In a Jeep (GC) my phone makes the interference (only when the stereo is on) in my Audi I get zero interference. At home by my PC I get no iterference unless I put it 1 inch away from the speaker and my home theater does not pick up any noise. One Item that does all the time (on or off) is my alarm Radio by my bed but if I keep it about 8 inches or more away it is all good. We can say we get what we pay for.

 

very true.........i'll talk with my friend.........then she'll put me on speaker........then she'll get a text message and i hear the buzzing noise........really weird.......dont understand why it only happens when she gets a text

 

yeah........i'm pretty sure that it was when i was talking on her cell phone and she put me on speaker and then she got a text and it di the buzzing