Acoustic feedback could enhance the gesture based interface experience. Without haptic and only little visual feedback a hearable hint could help the users to understand what effect their actions will produce. Acoustic feedback could indicate if the user is holding his hands in the right position and could also help to find the «correct» gesture.
A few attributes I am looking for in my interface sounds:
– pleasant
– a bit mechanical
– unobtrusive
– discreet
– confirmative
– not squeeky
– not too playful
An imaginable sound for a lamp to switch on could maybe sound like this: