| ReturnTo Theme-Group-Choice | Onelevelup |
| 5D021 | Electrostatic, electromagnetic, magneto- strictive, and variable-resistance transducers | |
| H04R11/00 -11/06;11/14-13/00;13/02-15/00;15/02;19/00;19/01-19/04;21/00-21/02;23/00-23/00,320;23/02;31/00@C-31/00@Z | ||
| H04R11/00-11/06;11/14 | AA | AA00 MOVING IRON-CORE OR MOVABLE ARMATURE TRANSDUCERS |
AA01 | AA02 | AA03 | AA04 | AA05 | |||||
| . Moving components inside the coil | . . Magnetic-circuit components | . . Diaphragms | . . Armatures | . . Transmission components | ||||||||
| AA11 | AA12 | |||||||||||
| . Moving components outside the coil | . . Magnetic-circuit components | |||||||||||
| H04R13/00;13/02 | BB | BB00 ELECTROMAGNETIC TRANSDUCERS |
BB01 | BB02 | BB03 | BB04 | BB05 | BB06 | BB07 | BB08 | ||
| . Vibration components | . . Diaphragms | . . . Types consisting of magnetic material | . . . Cone-shaped types | . . Armatures | . . . Types consisting of permanent magnets | . . Diaphragm supports | . . Couplings between the diaphragm and the armature | |||||
| BB11 | BB12 | BB14 | BB15 | BB16 | BB17 | BB19 | BB20 | |||||
| . Magnetic-circuit components | . . Sub-magnetic-path formation | . Auxiliary components | . . Mounting of circuit elements | . . Resonance chambers, vent holes, and horns | . . Exteriors and housings | . Overall structure and arrangement | . Manufacturing methods and apparatuses therefor | |||||
| H04R19/00;19/01-19/04 | CC | CC00 ELECTROSTATIC TRANSDUCERS |
CC01 | CC02 | CC03 | CC04 | CC05 | CC06 | CC07 | CC08 | CC09 | CC10 |
| . Movable electrodes | . . Diaphragms | . . . Types consisting of electrets | . . . Layer structures | . . Supports | . . . Spacers | . Fixed electrodes | . . Types consisting of electrets | . . Push-pull electrodes | . . Supports | |||
| CC11 | CC12 | CC14 | CC15 | CC16 | CC17 | CC18 | CC19 | CC20 | ||||
| . Electrical connections | . . Connection to fixed electrodes | . Auxiliary components | . . Mounting of circuit elements | . . . Mounting of elements for converting electric impedance | . . Acoustic resistance and damping materials | . . Resonance chambers, vent holes, and horns | . Overall arrangement or structure | . Manufacturing methods and apparatuses therefor | ||||
| H04R23/00-23/00,320 | DD | DD00 TRANSDUCERS USING OTHER PRINCIPLES |
DD01 | DD02 | DD03 | DD04 | DD05 | DD06 | ||||
| . Use of semiconductors | . . Use of transistors | . Use of electromagnetic conversion elements | . Use of optical elements | . Discharge transducers | . Air-flow transducers | |||||||
| H04R23/02 | EE | EE00 TRANSDUCERS USING TWO OR MORE PRINCIPLES |
EE01 | |||||||||
| . Combination of dynamoelectric and piezoelectric principles |