A sound transducer with a flat, flexible diaphragm working with bending waves
Daniela L. Manger · The Journal of the Acoustical Society of America · 1999
From the time of the idea to the finally working sound transducer, a period of over 20 years was necessary. The time has been needed for development and research in manufacturing and materials. It took a long time until new synthetic and magnetic materials were available with their best fitting mechanical behaviors. Nowadays it is possible to present a wideband sound transducer working from 100 Hz up to 35 kHz. It follows time precise without any mechanical energy storage the incoming signal. The special structure of the flat and flexible diaphragm works concentrically only with bending waves. A simple mechanical model, theoretical equations and measurements will be presented in comparison to the omnipresent Rice–Kellogg piston loudspeaker. The advantages in perception and hearing will be shown with regard to physiological behaviors of the hearing sense.