The less noise the better!
Just stand near an expressway or a busy street. Listen to the noise. Noise that we tune out because we hear it all the time is still there, and its effects are still felt. Noise reduction means less stress, better sleep, better concentration, etc. Bicycle riders use a little jingle or horn to warn pedestrians; drivers can do the same. Calling auto manufacturers 'witless' for making quiet cars, is, in itself, a witless act!