Long time readers may remember my second post on corewerkz: How to prevent iPhone audio interference in speakers. Basically, I used aluminum foil to block the GSM cell-phone signals from getting into my car speakers (or computer speakers).
Although this solution kept the noise out of the speakers, and didn’t seem to effect cell signal, it did have an impact on bluetooth reception. I was getting lots of static when the iPhone was more than about 12″ from my bluetooth headset (both Plantronics and Jawbone). Needless to say, using bluetooth on a daily basis became a hassle.
I have found a new and improved technique that will keep bluetooth static to a minimum and the noise out of your speakers; instead of aluminum foil, use the foil-paper that you find in a pack of cigarettes. For whatever reason, it seems to block the exact right amount of GSM and keep bluetooth interference to a minimum. In fact, it may even block the speaker interference better – I haven’t heard a peep since the foil-paper.
or find an empty box and remove the inner lining (Fig. B):
Fig. A:
Fig. B:
Here’s what you’ll get:
The size of the foil-paper is almost perfect, but you’ll probably want to cut/tear a bit off the sides so it fits better. Using the old aluminum foil method, affix the single piece of foil-paper to the area indicated below:
This is especially nice if you have an iPhone case (like an Otterbox), so you don’t actually need to tape the foil to your phone. Here’s the foil-paper tucked into the front cover of the Otterbox (back cover off) — this size/placement works perfectly for me:
No more speaker interference and no more (or at least much less) bluetooth interference!
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Tags: aluminum foil, bluetooth headset, car speaker, car speakers, cigarettes, computer speaker, computer speakers, foil method, foil paper, gsm cell phone, gsmiPhone, interference, iPhone, jawbone, otterbox, phone signals, plantronics, speaker, speaker noise
[...] Bei corewerkz zeigt man uns mal wieder einen iPhone-Hack zum Kopfschütteln. Ähnlich wie bei der Attacke auf die Speaker des iPhones, ist die hier veröffentlichte Bastel-Anleitung sicher nicht jedermanns Sache, verspricht jedoch weniger “Handy-Tackern” auf der nächsten Autofahrt und soll zudem keinen, bzw. nur marginalen Einfluss auf den GSM- und Bluetooth-Empfang des iPhones haben. [...]
[...] the past, I’ve tried both aluminum foil and cigarette foil paper to block the iPhone’s GSM/Data interference from entering my car speakers (also notorious [...]
This is an awesome tip…thank you!
@Stop Train Noise
fyi… I’ve found a better solution: instead of aluminum, cut out of piece of an anti-static bag — i.e. the bag a hard drive comes in (like this). works better and i think it blocks less phone reception.