Chosen Solution

I got these headphones and they worked great except for one thing. About every 30 minutes the sound cut out and was replaced with deafening feedback noises. I can fix it by unplugging and plugging back in but it keeps happening. Please help.

It’s a known ‘feature’ for this model, and there doesn’t appear to be any proper fix. Someone at Sennheiser decided to put in power-saving features. If the signal is below a certain level for a certain amount of time, the transmitter switches off. Unfortunately, what the software writer thought was a reasonable floor level for “there’s nothing coming in, the source must be switched off” is other people’s idea of “this is a quiet piece of music and/or dialogue”. As far as I’ve been able to tell, there’s no way to tweak those settings: you can’t vary the detection level, and you can’t tell it to wait a bit longer before cutting off. If anyone knows how, please share! The solution that JNL68 posted earlier looks like it loops a background noise, outside human hearing range but enough to keep the headphones awake. That should work, if you’re only using the headphones on a computer, but it’s a bit awkward to use for a TV or stereo. The closest thing to an ‘official’ answer I’ve seen is to crank the volume on your TV/PC/stereo/whatever as high as it’ll go, then use the control on the headphones to dial back the volume to a reasonable level. They’ll still cut out if there’s actual silence for three minutes, but they should (in theory) stay on when there is something quiet happening. Remember to turn the volume back down if you want to unplug the headphones and use ’normal’ speakers!

I am not certain since I am not there and cannot check with a Spectrum analyzer, but those Wireless Headphones use the 900 Mhz Spectrum and many devices use that frequency especially Regular Wireless phones and also some low end routers. You might be getting some other device overriding the frequency that those Headphones use. I personally use Bluetooth headphones since they are Adaptive Frequency-Hopping (AFH) and they use a different frequency than Household phones and routers. Plus they are cheap or expensive and they are new school not like your old school headphones which yours are since they are not Adaptive Frequency-Hopping (AFH) like the Bluetooth are.

They all do, its a feature ;) Found on a Dutch forum not long after I got my RS120 :) thanks Tweakers.net Roadmap for solving the noise:

  1. Download the file: http://dl.dropbox.com/u/56802694/antista...;
  2. download a music player (ie winamp as an example, at least other than your default player for MP3.);
  3. set the program as the default program for .wav files;
  4. Drag the antistatic.wav to your Startup folder;
  5. Mount winamp standard on repeat;
  6. mutes winamp on up (otherwise the transmitter picks up the sound is not clear, and you have as yet bothered by noise);
  7. For the best user experience you can also set these winamp minimized start-up as a background program (ALT + W in the main window);
  8. Enjoy a noiseless sound experience!

I have the same problem , fear for my ears when the white noise hits!! let me know if you find a solution

Re-connect the optical digital cable

If the sound goes in and out it may be getting Wi-Fi interference. Wrap the receiver in tin foil. That will block the digital signal that is interfering. It looks bad but it works.