Bending wave loudspeaker with a constraint coupled to a discrete region of the panel to which a transducer is also coupled

摘要

A loudspeaker is made of a panel (1) supporting bending waves and a transducer (3) covering a substantial portion of the panel surface. At least one constraint 11, for example a clamp or a mass, is fixed to the panel. Each constraint reduces the mobility of a small area of the panel. Excitation of the transducer excites bending waves in the panel; the constraints discourage simple motion and encourage the production of a plurality of bending waves instead. The constraints can constrain the panel to be excited to produce a good distribution of resonant bending wave modes.