The Overhanging has proven valuable as an acoustics-demonstration device; also as a funny-noises generator. It reveals the inner vibratory life of a narrow spring-steel rod whose sounds would otherwise be inaudible or nearly so. It consists of a simple system for holding the rod firmly enough for good vibration while allowing continual variation of the active length. Positioned beneath the rod is a magnetic pickup, allowing you to monitor the vibrations in the rod. It’s really remarkable how many fascinating, odd and comical sounds this thing can make, and how many unexpected and interesting acoustic phenomena it can demonstrate.
In the audio clip, the Overhanging is sounded by plucking and by scraping with a threaded rod.