Instruction: Answer the given question by extracting information from the supporting document.

Input:
Question: Anyway to get rid of the buzzing noise? Has anybody had any luck eliminitating the background buzzing noise?  Any additional settings I can try?  The best seems to be when the iPod volume is on high, and the car stereo volume is low.
Document: I was very excited about this product but found that it did not meet my expectations. The remote is handy, and I love the long ipod cord, but no matter how I adjusted the settings, I could not get rid of the buzzing noise. It was tolerable during louder songs, but incredibly annoying during slower/softer songs and especially during podcasts. I would not recommend this product.
Doesn't work with the Nano 4th Gen or 5th Gen - they made the dock so big that you can't even get a headphone jack or and audio out jack to fit. This is my 3rd try at a dock and nothing seems to work for the Nano. Also, the price is WAY too high!! Bad deal all around
It is true wireless, not infrared, and does not have toactually be pointing at anything in order to work. It only has buttons tonavigate from song to song (you can't change to a different playlist forexample), and a button to change the repeat settings (and also reset themif you're in a playlist). I haven't gotten to the end of a playlist yet,so I did not try to get back into playing songs from the iPod menus.. Idon't have any idea if that is possible.
this works as advertised but sounds quieter than the other ipod connection I have, (I think is a griffin), for it to get a loud sound like I like it I have to turn the volume all the way up and it still is not loud enough, I'd say it sounds 40% lower than the cd player in my car (2007 beetle), also there is a humming noise, but I get that with the griffin also, so that's my car's issue.
I was torn between this product and the TuneFlex with Smartclick by Griffin. While the products at first glance are very similar as far as comparison of features, one major difference is the way you get your sound from each. With the TuneFlex the connection between your car's aux input and your iPod/iPhone is through the headphone jack. This means you have to adjust the volume and EQ settings on your device (which can cause distortion) as well as in your vehicle.
Alternator whine in my 06 Infiniti M35x and a high pitch squeal in an 08 Civic make this unusable. Disconnecting the power cable helps, but then you lose 1/2 the volume.There's a newer version of this available as well as one from Griffin that I may try.
The idea for this product is great, and would probably work great in most cars (with an aux in jack). In my particular vehicle, a 2008 RAV4, the 12v power plugs are not filtered, and this was passed through the LiquidAux unit in the form of high-pitched whine that varied with the motor speed. The unit functioned perfectly otherwise. In two of my friends' cars, it did not exhibit this issue, and while the volume was a little low, it was perfectly usable.
It looks and feels well built. The charging light is unobtrusive but clear.I might have preferred an adjustable line out volume level switch, and a female headphone jack, or a lower price, but in the end this is really quite a good product.Note: I do get *some* GSM noise over the car speakers when the phone is talking over edge, though less than I've gotten with this car using some other interfaces, so I'm not sure I should complain.
Not too much to add to existing reviews. Just wanted to let everyone know that it works nicely in my Honda Element.Pros:-Volume is fine: Signal to noise ratio seems acceptable and overall volume to radio is sufficient.-There is no interference as noted in other reviews.-Location of the charger and AUX port make this a perfect match.Cons:-As noted in other reviews, build quality is weak. I already had to superglue the cover plate on the charger.
If you have an auxiliary jack in your stereo and don't feel like finding an iPhone-friendly cable for the back of the unit, give this a shot. I'm going to keep using it until the high-pitched engine noise drives me batty.
Answer: What you are referring to is most likely a phenomenon called "ground loop" or ground loop noise.  This occurs when two or more items use the same ground arriving through different paths or it may also be EMI (electro-magnetic interference) from the various wirings around it.  The easiest solution to get rid of it?  A ground loop isolator works wonders and in this particular case there are ones available that require no special modification or installation, they install basically "in line" with the aux cable!I found one on Crutchfield and also on SonicElectronix (eBay as well) for less than $20, although I have yet to find this particular style here on Amazon.http://www.sonicelectronix.com/item_8987_PAC+SNI-1-3.5.html