Diaphragms for electromechanical transducers (in general F16J3/00); Cones (for musical instruments G10 )

Child Classifications

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• H04R 7/02 characterised by the construction
• H04R 7/16 Mounting or tensioning of diaphragms or cones
• H04R 7/26 Damping by means acting directly on free portion of diaphragm or cone (air damping H04R1/28)