HearWear is a concept created by Younghui Kim and Milena Iossifova, uses the sound/noise level of the environment to create active color patterns on clothing or bags.

These cool garments interact with ambient sounds and show the levels on the garment. The microphone and processor converts the sound levels into light via LEDS and EL wire.

Despite its coolness, this may also have safety purposes too. Good Stuff.