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H04R 1/00
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LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS - Details of transducers |
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H04R 1/02
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Casings; Cabinets; Mountings therein |
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H04R 1/04
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Structural association of microphone with electric circuitry therefor |
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H04R 1/06
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Arranging circuit leads; Relieving strain on circuit leads |
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H04R 1/08
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Mouthpieces; Attachments therefor |
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H04R 1/10
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Earpieces; Attachments therefor |
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H04R 1/12
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Sanitary or hygienic devices for mouthpieces or earpieces, e.g. for protecting against infection |
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H04R 1/14
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Throat mountings for microphones |
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H04R 1/16
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Mounting or connecting stylus to transducer with or without damping means |
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H04R 1/18
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Holders for styli; Mounting holders on transducers |
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H04R 1/20
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Arrangements for obtaining desired frequency or directional characteristics |
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H04R 1/22
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Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only |
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H04R 1/24
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Structural combinations of separate transducers or of parts of the same transducer and responsive respectively to two or more frequency ranges |
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H04R 1/26
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Spatial arrangement of separate transducers responsive to two or more frequency ranges |
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H04R 1/28
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Transducer mountings or enclosures designed for specific frequency response; Transducer enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means |
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H04R 1/30
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Combinations of transducers with horns, e.g. with mechanical matching means |
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H04R 1/32
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Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only |
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H04R 1/34
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Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means |
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H04R 1/36
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Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means by using a single aperture of dimensions not greater than the shortest operating wavelength |
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H04R 1/38
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Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means in which sound waves act upon both sides of a diaphragm and incorporating acoustic phase-shifting means, e.g. pressure-gradient microphone |
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H04R 1/40
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Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers |
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H04R 1/42
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Combinations of transducers with fluid-pressure or other non-electrical amplifying means |
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H04R 1/44
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Special adaptations for subaqueous use, e.g. for hydrophone |
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H04R 1/46
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Special adaptations for use as contact microphones, e.g. on musical instrument, on stethoscope |
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H04R 3/00
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Circuits for transducers |
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H04R 3/02
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Circuits for transducers for preventing acoustic reaction |
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H04R 3/04
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Circuits for transducers for correcting frequency response |
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H04R 3/06
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Circuits for transducers for correcting frequency response of electrostatic transducers |
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H04R 3/08
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Circuits for transducers for correcting frequency response of electromagnetic transducers |
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H04R 3/10
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Circuits for transducers for correcting frequency response of variable-resistance microphones |
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H04R 3/12
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Circuits for transducers for distributing signals to two or more loudspeakers |
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H04R 3/14
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Cross-over networks |
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H04R 5/00
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Stereophonic arrangements |
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H04R 5/02
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Spatial or constructional arrangements of loudspeakers |
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H04R 5/04
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Circuit arrangements |
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H04R 5/027
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Spatial or constructional arrangements of microphones, e.g. in dummy heads |
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H04R 5/033
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Headphones for stereophonic communication |
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H04R 7/00
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Diaphragms for electromechanical transducers; Cones |
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H04R 7/02
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Diaphragms for electromechanical transducers; Cones characterised by the construction |
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H04R 7/04
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Plane diaphragms |
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H04R 7/06
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Plane diaphragms comprising a plurality of sections or layers |
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H04R 7/08
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Plane diaphragms comprising a plurality of sections or layers comprising superposed layers separated by air or other fluid |
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H04R 7/10
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Plane diaphragms comprising a plurality of sections or layers comprising superposed layers in contact |
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H04R 7/12
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Non-planar diaphragms or cones |
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H04R 7/14
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Non-planar diaphragms or cones corrugated, pleated, or ribbed |
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H04R 7/16
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Mounting or tensioning of diaphragms or cones |
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H04R 7/18
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Mounting or tensioning of diaphragms or cones at the periphery |
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H04R 7/20
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Securing diaphragm or cone resiliently to support by flexible material, springs, cords, or strands |
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H04R 7/22
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Clamping rim of diaphragm or cone against seating |
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H04R 7/24
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Tensioning by means acting directly on free portion of diaphragm or cone |
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H04R 7/26
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Damping by means acting directly on free portion of diaphragm or cone |
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H04R 9/00
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Transducers of moving-coil, moving-strip, or moving-wire type |
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H04R 9/02
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Transducers of moving-coil, moving-strip, or moving-wire type - Details |
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H04R 9/04
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Construction, mounting, or centering of coil |
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H04R 9/06
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Loudspeakers |
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H04R 9/08
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Microphones |
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H04R 9/10
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Telephone receivers |
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H04R 9/12
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Gramophone pick-ups using a stylus; Recorders using a stylus |
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H04R 9/14
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Gramophone pick-ups using a stylus; Recorders using a stylus comprising two or more styli or transducers |
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H04R 9/16
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Gramophone pick-ups using a stylus; Recorders using a stylus signals being recorded or played-back by vibration of a stylus in two orthogonal directions simultaneously |
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H04R 9/18
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Resonant transducers, i.e. adapted to produce maximum output at a predetermined frequency |
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H04R 11/00
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Transducers of moving-armature or moving-core type |
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H04R 11/02
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Loudspeakers |
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H04R 11/04
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Microphones |
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H04R 11/06
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Telephone receivers |
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H04R 11/08
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Gramophone pick-ups using a stylus; Recorders using a stylus |
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H04R 11/10
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Gramophone pick-ups using a stylus; Recorders using a stylus comprising two or more styli or transducers |
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H04R 11/12
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Gramophone pick-ups using a stylus; Recorders using a stylus signals being recorded or played-back by vibration of a stylus in two orthogonal directions simultaneously |
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H04R 11/14
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Resonant transducers, i.e. adapted to produce maximum output at a predetermined frequency |
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H04R 13/00
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Transducers having an acoustic diaphragm of magnetisable material directly co-acting with electromagnet |
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H04R 13/02
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Telephone receivers |
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H04R 15/00
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Magnetostrictive transducers |
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H04R 15/02
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Resonant transducers, i.e. adapted to produce maximum output at a predetermined frequency |
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H04R 17/00
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Piezoelectric transducers; Electrostrictive transducers |
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H04R 17/02
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Microphones |
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H04R 17/04
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Gramophone pick-ups using a stylus; Recorders using a stylus |
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H04R 17/06
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Gramophone pick-ups using a stylus; Recorders using a stylus comprising two or more styli or transducers |
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H04R 17/08
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Gramophone pick-ups using a stylus; Recorders using a stylus signals being recorded or played-back by vibration of a stylus in two orthogonal directions simultaneously |
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H04R 17/10
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Resonant transducers, i.e. adapted to produce maximum output at a predetermined frequency |
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H04R 19/00
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Electrostatic transducers |
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H04R 19/01
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Electrostatic transducers characterised by the use of electrets |
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H04R 19/02
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Loudspeakers |
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H04R 19/04
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Microphones |
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H04R 19/06
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Gramophone pick-ups using a stylus; Recorders using a stylus |
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H04R 19/08
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Gramophone pick-ups using a stylus; Recorders using a stylus comprising two or more styli or transducers |
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H04R 19/10
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Gramophone pick-ups using a stylus; Recorders using a stylus signals being recorded or played-back by vibration of a stylus in two orthogonal directions simultaneously |
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H04R 21/00
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Variable-resistance transducers |
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H04R 21/02
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Microphones |
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H04R 21/04
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Gramophone pick-ups using a stylus; Recorders using a stylus |
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H04R 23/00
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Transducers other than those covered by groups |
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H04R 23/02
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Transducers using more than one principle simultaneously |
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H04R 25/00
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Deaf-aid sets |
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H04R 25/02
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Deaf-aid sets adapted to be supported entirely by ear |
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H04R 25/04
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Deaf-aid sets comprising pocket amplifiers |
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H04R 27/00
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Public address systems |
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H04R 27/02
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Amplifying systems for the deaf |
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H04R 27/04
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Electric megaphones |
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H04R 29/00
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Monitoring arrangements; Testing arrangements |
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H04R 31/00
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Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor |
