pneumatic loudspeaker

7.91  pneumatic loudspeaker. Loudspeaker that generates high-intensity sound by controlled variations of the instantaneous volume flow of an air...

piezoelectric loudspeaker

7.90  piezoelectric loudspeaker. Loudspeaker that operates by deformation of a piezoelectric...

electromagnetic loudspeaker

7.87  electromagnetic loudspeaker. Loudspeaker designed to operate by the variations in the reluctance of a magnetic...