AutoVolume - Automatic Sound Adjustment - Amplifier / Limiter

From Best App Dev for Cool, Intelligent Apps:

Think of a world where music is always playing at the correct volume level (based on noise), or lowers itself when you talk. Forget about constantly pushing the volume buttons when noise is changing around you (transport stop n goes / city noise) Be able to listen music while your sudden attention is needed (in Office). Or talk while you listen music. This app will automatically adjust the volume level depending on the average noise levels outside. All this Intelligently, gracefully and just as much as you prefer. This app is also able to instantly lower the music volume when talking or some noise is heard, making it useful in office where sudden attention is needed. AutoVolume is beautifully designed, simple to use but fully customizable, and it just works! It's the ultimate Automatic Volume Control - Best app for music listeners out there in the city.

Where to use it. Use it while traveling on noisy transport that is constantly making stops (different noise levels every minute), when passing by a loud street. Use it or sitting in the office with an alarm that will lower your music at any noise or someone's voice. AutoVolume runs in the background . Two main mode. Amplifier mode (volume adapts to the outside noise). Office mode (volume drops to the noise outside). Lot of parameters and features. Change characteristics of signal-to-noise ratio (input/output volume curve) with your finger tips. Change volume fader speed and increment (have the volume gracefully adjusted your way). Change threshold (set your preferences of minimum noise input). Change sampling speed and duration (for reaction speed and averaging characteristics). Choose between different averaging methods (Simple average or Median average). Use MicTouch protection (no more false volume inputs while switching songs with your fingers). Use different profiles (edit, save and load configurations quickly for different situations). Use Hold at Minimum function (volume remains low for a pre-configured amount of seconds). Built in Music player (access your iPod library right from the app). Shake device for visual help.