Details of transducers of the moving-coil, moving-strip, or moving-wire type covered by H04R9/00 but not provided for in any of its subgroups

Child Classifications

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• H04R 2209/021 Reduction of eddy currents in the magnetic circuit of electrodynamic loudspeaker transducer
• H04R 2209/022 Aspects regarding the stray flux internal or external to the magnetic circuit, e.g. shielding, shape of magnetic circuit, flux compensation coils
• H04R 2209/024 Manufacturing aspects of the magnetic circuit of loudspeaker or microphone transducers
• H04R 2209/026 Transducers having separately controllable opposing diaphragms, e.g. for ring-tone and voice (H04R2400/03 takes precedence)
• H04R 2209/027 Electrical or mechanical reduction of yoke vibration
• H04R 2209/041 Voice coil arrangements comprising more than one voice coil unit on the same bobbin
• H04R 2209/043 Short circuited voice coils driven by induction