Electro-acoustic transducer having a diaphragm comprising a...

Details Electro-acoustic transducer having a diaphragm comprising a... Electro-acoustic transducer having a diaphragm comprising a...

H - Electricity

04

R

349/84

H04R 7/02 (2006.01) H04R 7/00 (2006.01) H04R 7/10 (2006.01)

Patent

CA 1201798

16 ABSTRACT: An electro-acoustic transducer has a diaphragm which comprises a layer of a polymethacrylimide foam having a modulus of elasticity between 15.106 and 120.106 N/m2 and a density between 10 and 80 kg/m3. If the diaphragm is of a sandwich construction, the core layer is made of this polymethacrylimide foam and the skin layers are made of glass fibres, carbon fibres, cellulose fibres or polyaramide fibres. This results in a transducer having a higher efficiency and a lower distortion.

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