iPhone 4S high pitch noise

I've got the same problem. I made a video with the sound, it's the same??

http://www.youtube.com/watch?feature=player_embedded&v=cFGFCOdm-aQ

Bye!

Yep, that's it

Exactly the same thing for me.

Again, I solved it by changing the cable.

It's a shame, but it's a solution.

Instead of a retractable jack cable bought $5 I got a Monster Aux 1000 for about $30 and solved. The sound is now crystal clear.

Probably due to the double antenna of the 4S interfering and creating those static noises.

Thank you for documenting this issue. I have a pair of Sennheiser HDC 451 noise canceling headphones that worked fine with my original iPhone and also work fine with my current iPhone 4. When I plug these headphones into an iPhone 4S or an iPad 2, I hear the that awful high pitched squeal. The cable is hard wired into a little battery box so I cannot replace the cable.

Recently I sent my iPhone 4S to the technical service because had another problem related with sound. The speakear didn't works for playing music (or sounds in games), but do the ring sound and (coriously) works with the voice memo app.

The short story is that my mobile company sent me a new (but refurbished) iPhone 4S that doesn't make the stranger noise in my car.

The conclusion of the technical service is a electronical problem (may or not related with the pitch noise). I don't know if is related, but... who knows? check your spekear, and answer this thread.

I have the same issue in my BMW 328i with the iPhone 4s. This extremely annoying static only started after I updated to iOS5.1. I cannot listen to any music in my car anymore. I have tried two aux cables but the same result. I hope Apple fixes this problem. This is very frustrating!

Hi there! I have absolutely the same problem. iphone 4s white 64G, Belkin aux cable (I have two of them) and Ford SMAX S Titanium. Very annoying high pitch sound, which is always there with or without music. Tried another available non-branded cables, the cheap versions seem to have less of the same problem. Logitech cable, which is coming with its speaker, also has the same problem!

I have also tried many earphones, and my Bosse noise canceling headphones - no problems at all! Just in the car... very annoying!!!

what do you think I should do?

The only thing that fixed the problem in my BMW was a cable with a volume control in-line. Turning that volume control all the way down increases the impedance of the input and makes the high pitched noise go away - but it still doesn't sound as good as my 3GS phone sounded in the car.

Here is a link to a cable they sell at 'the Source' which is canada's version of Radio Shack. Any cable with an analog volume control in it should work.

http://www.thesource.ca/estore/product.aspx?language=en-CA&catalog=Online&catego ry=HeadsetsAndMics&product=3310115

As I already mentioned, order a Monster iCar cable.

Solved the problem I have a Ford C-Max and wasn't able to listen to music or my GPS.

Everything is crystal clear now.

http://www.amazon.com/Monster-iCarCharger-1000-iPod-iPhone/dp/B002E9HHY2/ref=wl_ it_dp_o_pdT11_nS?ie=UTF8&coliid=IF1KVNZJD58NN&colid=1102DQLTRL4JV

The beauty of the thing is that it also ads controls for your music. So you can skip, pause, forward, etc.

Did the trick for me.

It's not an apple problem.

I have the same whine that diefocaro posted above in my Mini Cooper S but with my Sony Walkman E Series.

I came here looking for help but all I see is that I'm not alone. 😟

I found the problem and the solution.

The problem:

The new IPhone 4s, like many amplifiers, does not like a capacitive load. An inductive or resistive load it will drive just fine, when presented with a highly capacitive load the final amplifier will oscillate. In my case it was oscillating at 200khz. Yes this is WAY outside of human hearing, so my cassette adaptor is mixing this within its circuitry, or the car stereo is mixing it down into the audible frequencies.

The solution:

My cassette adaptor had a little printed circuit board inside of it. The circuit on the board is very simple, mainly to match the head adaptor to the headphone cable. It does this via a RC network. Unfortunately they put the capacitor first then the resistor. The solution is to put the series resistor in front of the shunt capacitor, thus increasing the impedance of the shunt capacitor by the value of the series resistor. This stopped my iPhone 4s from oscillating.

Summary:

I opened up my cassette adaptor and moved the shut capacitor from the headphone side of the resistor to the cassette head side of the resistor.

Note:

The capacitor is also there to prevent the RF noise from the phone's cellular and wifi antenna causing noise on the stereo.

Good Luck!

Chuck Kamas

Chuck,

That fix did it for me!! so STOKED!!!!!! Albeit you have to be fairly handy with a soldering iron to work smd components.

I'm no electrical engineer, but I do alot of circuit board work. I mostly monkey-see-monkey-do as I am learning my way through this, and still don't fully grasp exactly how to put a circuit together (or modify a circuit).

My cassette adapter had the same type of printed board with an RC circuit. Two virtually resistance-less resistors and two tiny smd caps, with no numbers. I broke one of the caps trying to get it off the pcb as I have never removed smd caps before, and because of that I substituted them with 2 through-hole .001uf 100v ceramic caps (digikey 399-201-ND) I had laying around from another project. I followed what you said, putting the caps from the headphone side over to the cassette side and it worked perfectly!

No more Hiss. Finally.

Schematic I drew up...not sure if its totally right, but you get the idea.

right click and save as: http://www.dedericms.com/images/dms/casadptr/casadptmod.pdf

Thanks,

Derek

<Edited by Host>

I think you guys took this post offtrack!!! We were hardly babling about cassette adapter! Let us know if you have any solution for AUX input. I mean come on, are there cassette decks still around in cars?

It doesn't just apply to cassette adapters....

yes, its a problem with the 4s, no apple wont fix it. I'm not about to open my phone up and do work in it, but ill be willing to muck around inside my cars head unit or the cassette adapter. Technically speaking, you could make an adapter with the RC network inline to fix your issues which is still a workaround, but I doubt anyone from Apple cares enough about this forum to make changes to phones they ALREADY sold. We're doomed to use workarounds.

My BMW is not a new car (1989), which is why I use a cassette. However, this fix would apply to almost any type of 3.5mm jack input (headphone aux input).

Apparently, this is not a problem for those using the dock connector to output audio. New cars mostly have ipod-ready connections or a USB port, so this doesn't apply to those.

So I am pretty sure I missed your point. Opening up the car stereo to reconfigure the AUX in is out of question. How will i reconfigure capacitor? All i can do is add resistor inline but isnt it like reducing volume? Is that what you suggesting or something different?

Anyway my BMW has bluetooth so all set there but sometimes I also drive the passat.