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September 2008
iDEALS
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If you're like me, your iPhone is docked dangerously close to one (or both) of your speakers.
For as long as I’ve owned my iPhone, it’s held a permanent spot on my desk in its dock adjacent to one of my JBL Creature speakers. My cell phone is my primary form of communication in and outside my home, so it needs to be within reach at all times; and with so much e-mail checking and Internet browsing, it also usually needs to be charged.
Suffice to say, I’ve learned to deal with the annoying GSM buzz. You know what I mean: on some days, it’s barely audible, but more often, it “talks” to my speaker, which chirps back with a series of startling hums and purrs every few seconds. It’s a horrible noise when all is quiet at my desk and quite bothersome when listening to music.
Lately, however, it’s gotten increasingly worse, to the point where I’ve been woken in the middle of the night by my phone’s incessant buzzing. I’ve resorted to putting the thing in a drawer once it’s fully charged, which has led to missed calls and text messages. I’ve searched high and low for a solution, but short of buying new speakers or wrapping my phone in aluminum foil , I couldn’t find one.
Just the other day, however, after a particularly aggressive buzzing spell, I hit Google again, in pursuit of some relief. After reading about optical hook-ups and ground loops for the umpteenth time, I was ready to give up when I stumbled across a new term buried in the comments of one of less-than-helpful articles: ferrite beads.
Ferrite beads are passive electric components used to suppress high frequency noise in electronic circuits.
For those who don’t know, ferrite beads are housed inside the little nub found at the end of some USB cables. They can be cheaply purchased at most stores that sell computer parts (like Radio Shack), but if you happen to have an extra (and disposable) cable handy, this simple solution can be had for free.
If you've ever wondered what those little boxes at the end of USB cables are, crack open the case. Inside, you'll find a small ferrite.
It’s really quite simple. Take a pair of scissors and cut off the end of the USB cable. Pop open the ferrite case and slide the bead off. Then, all you need to do us attach the bead to the end of your speaker cable, where it meets the speaker. If you cannot fit the connector through the pre-drilled hole (I couldn’t), simply tape it to the wire with a measure of electrical tape.
Attach the bead to the wire with electrical tape, as close to the speaker as possible.
And viola! No more buzzing out of the right speaker (You’ll need a separate bead for each affected speaker). Now, my iPhone can charge all night long without waking me; even as I write this, my speaker hasn’t made a peep.
So, before you drop $150 on a new set of speakers, go grab your scissors and slice up a USB cable. Your ears (and checking account) will thank you.
ok, wow! sounds great, but
Submitted by john gallo (not verified) on Wed, 2008-02-13 08:04
ok, wow! sounds great, but how do i stop the buzz in my car? ive started to use the iphone to replace cds in my car, but have to deal with that buzz. kinda hard to wrap a ferrite bead to those speakers without undoing everything.
Submitted by Elsifer (not verified) on Thu, 2008-02-14 07:41
Try moving the iphone away from the dash.
Otherwise, put ferrite donuts on each of the speaker leads. Or one big one on the wiring harness into the car stereo. From the passenger side of the vehicle, you should be able to reach up and back into the dash to grab that.
The speaker wires are acting as antenna's, blame FCC Part 15. Cheap consumer electronics are not meant to put out harmful interference, but must accept unwanted interference.Or when driving, put the iphone in flight mode. You shouldn't be talking on the phone and driving anyways!
Submitted by MacMike (not verified) on Wed, 2008-02-13 08:54
There's an even EASIER solution, use an anti-static bag. The anti-static bag acts something like a Faraday cage to isolate the higher frequencies from interfering with the electronics around it. I've been doing this for a while now and it definitely helps. Just slide your phone into an anti-static bag and keep it in your area (still not right near your speakers). You can still get calls on your phone and sync it. The advantage of this method is that you don't need to cut any cables AND it will work even if your iPhone isn't connected to the cable. Give it a try!
Submitted by Anonymous (not verified) on Fri, 2008-03-28 07:03
Wow It really works. I slipped the Iphone right into the bag, connected to external speakers No more noise! I even called the phone it see if it would have any interference and nothing quite as can be.
Submitted by Troy T (not verified) on Wed, 2008-02-13 11:19
I remember getting things like these with my HDD video camera. It actually included snap-on versions of these things for every cable that it came with. Using the 'radio shack' reference in the article, I looked... they sell them for a little over $5 a piece. Go to their site and search out the catalog number.... it is 273-105.
I think this would handle the GSM radio interference in a car solution too, but sometimes what you're hearing in your car is related to something called 'ground loop interference'. These little items would not help with that situation.
Submitted by Mac Mechanic 707 (not verified) on Thu, 2008-02-14 00:10
It's great little nuggets like these that make life a little easier. Of course since keep my cell phone next to my office phone I know moments before my cell ever rings that it's going to.
Submitted by John Rhee (not verified) on Thu, 2008-02-14 18:42
So I found couple of those lying around (the clip on ones that came with my camcorder). I put it on both (L and R speakers) of the wiring from the back of the speaker. And I still hear the annoying GSM chirping and whirling sound. Am I doing something wrong here?
Submitted by Mike (not verified) on Fri, 2008-02-15 00:16
I don't know --- maybe there are different grades of ferrite? Is the sound diminished at all?
Submitted by John Rhee (not verified) on Fri, 2008-02-15 11:52
Well, it's hard to say. I think it has diminished a little but still annoying. You can check out a picture of where I placed it. The white section is white electric tape that I used to thicken the wire so the the clip on Ferrite would stay put instead of sliding down this thin speaker wire.
http://gallery.mac.com/jcrhee#100013
Submitted by Mike (not verified) on Sun, 2008-02-17 01:16
This may sound like a stupid question, but is there a bead inside the case? The only reason I ask is because I couldn't get mine to close around the cable, which is why I had to tape it to the wire.
It's not the speaker cable
Submitted by laptopleon on Tue, 2008-08-05 04:16
In the article, the cable from the Mac to the speaker is really carrying the (relatively weak) signal that is amplified in the speaker casing.
You have to use the ferrite on the cables that go into the amplifier. Then you guard it from becoming an antenna for unwanted signals. After the signal is amplified, the ferrite won't help, like in the cable to the speakers.
In this case, I'd go for the bag-solution, unless you have a radio you can connect a iPhone to by cable. Then use the ferrite on that cable.
Submitted by Alexis (not verified) on Tue, 2008-02-19 00:45
The two speakers I have beads taped to haven't made a sound all day. However, my alarm clock has a clip on bead on it and it still makes noise.
FWIW.
Submitted by Chadwick Grant (not verified) on Sat, 2008-02-23 15:51
I did an exhaustive study, and ferrite beads didn't work at all for me. I bought six different sets of speakers, and in the end, I learned that it's more about how the amplifier is shielded. Read more here:
http://9to5mac.com/iPhone_GSM_Buzz4_solved
It's also now the first result when googling "iphone GSM buzz" ;-)
Submitted by Alec (not verified) on Fri, 2008-03-21 11:47
This was an excellent little article. There are a number of short range wireless devices that produce this type of "buzz" as well.
Have you considered posting this little diddy in Instructables.com? I think it belongs there.
Submitted by Anonymous (not verified) on Sun, 2008-04-27 18:05
This doesn't just affect the iPhone. I've had a problem like this ever since my first cell phone. Oddly enough I've gotten so use to it that now I miss it. My speakers and my phone aren't ever near eachother so rare do I ever hear it. As I use to keep my phone on silent or vibrate all the time I had to depend on that beeping to know something was going on with my cell. I'll have to look into these beads though. Working on an experiment with my dad and those beads will come in handy as it deals with this very issue.
Submitted by Mystech (not verified) on Thu, 2008-06-26 09:46
I've seen this phenomena with many people's phones, but never with any Blackberry I've owned. I wonder if they are just better shielded or what.
Submitted by JRod (not verified) on Thu, 2008-06-26 10:30
Perhaps your Blackberry isn't on a GSM band. If you have Verizon, US Cellular, Alltel, Sprint or similar non-GSM carriers then it won't buzz. AT&T and T-Mobile are the widest GSM carriers in the US.
Submitted by Anonymous (not verified) on Thu, 2008-06-26 12:03
My ATT Blackberry Curve is GSM and suffers from this problem, well at least it did until I found this article on lifehacker this morning. Myself and the rest of the IT nerds here started hacking up cables and now the buzz is gone.
Submitted by David Martinez (not verified) on Thu, 2008-06-26 13:05
I went in calling them ferrite beads and I got blank stares and no help. After a while I found them, under the name "Snap Choke Core". They are $2.99 for a package of 2 at the Radio Shack by me.
Note that it's not just the wires coming to the speakers. In my case it's also right in front of the iMac. The iMac has the wire that goes *to* the speakers attached to its back. Once I did it on all 3 (two speakers, cable from Mac), it seemed to reduce it at the point that the speakers have to be full blast for me to start noticing.
Submitted by Michael Perlman (not verified) on Thu, 2008-06-26 20:11
One of my friends says that when he's listening to music on his CD or MP3 player, he can tell that he's got a phone call before the phone starts ringing. Both he and I have Nextel service (in one form or another - I've got prepaid Boost Mobile, a subsidary of Sprint Nextel), which runs on the proprietary Motorola-developed iDEN network. Phones on this network are notorious for interfering with other electronics (including shutting off my wireless mouse), so this tip may help at least with the audible interference.
Submitted by sam (not verified) on Wed, 2008-07-02 08:34
can anyone explain exactly why GSM devices cause such interference? I used to use Verizon which isn't GSM and that phone never caused such interference...a luxury i lost when i switched back to AT&T.
Submitted by vudean on Sat, 2008-08-02 19:15
What about land line phones that pick up the interference (portable and corder). I have one that does the "flash" thing and switches over to another line whenever it picks up a strong GSM buzz, quite annoying... any ideas? put the ferrite on the phone cord? the power cord to the phone? Wrap the whole dang thing in em??
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