Question about bluetooth and iphone?

[Antonia]

I have an iphone and have had one for about 6 months. For the last 4 months or so, I have noticed the sounds from the bluetooth are amplified. At first I thought it was the quality of the bluetooth, so I invested in a more expensive one. Which eventually led me to switching out bluetooths with varying prices, all with the same result. I went to the Apple store, and of course, nothing happened when the technician tried it but he gave me a new phone anyway. And of course the same problem is happening with this new phone. So it isn't the phone and it isn't the bluetooth.

What is causing my phone to amplify the noise instead of reduce the noise? How do I fix this?

[Waterbeds]

What type of headsets are you using. This sounds like the headset is malfunctioning. Most new bluetooth headsets have an "active" noise canceling function. It could be the headset your using and or the area you are testing them in.