Details of transducers, loudspeakers or microphones

HELECTRICITY H04Electric communication H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS DEAF-AID SETS PUBLIC ADDRESS SYSTEMS

H04R1/00Details of transducers, loudspeakers or microphones

H04R1/005using digitally weighted transducing elements H04R1/02Casings Cabinets; Supports therefor; Mountings therein H04R1/021incorporating only one transducer H04R1/023Screens for loudspeakers H04R1/025Arrangements for fixing loudspeaker transducers H04R1/026Supports for loudspeaker casings H04R1/028associated with devices performing functions other than acoustics H04R1/04Structural association of microphone with electric circuitry therefor H04R1/06Arranging circuit leads Relieving strain on circuit leads H04R1/08Mouthpieces; Microphones; Attachments therefor H04R1/083Special constructions of mouthpieces H04R1/086Protective screens H04R1/10Earpieces Attachments therefor; Earphones; Monophonic headphones H04R1/1008Earpieces of the supra-aural or circum-aural type H04R1/1016Earpieces of the intra-aural type H04R1/1025Accumulators or arrangements for charging H04R1/1033Cables or cables storage H04R1/1041Mechanical or electronic switches, or control elements H04R1/105Earpiece supports H04R1/1058Manufacture or assembly H04R1/1066Constructional aspects of the interconnection between earpiece and earpiece support H04R1/1075Mountings of transducers in earphones or headphones H04R1/1083Reduction of ambient noise H04R1/1091Details not provided for in groups H04R1/1008 - H04R1/1083 H04R1/12Sanitary or hygienic devices for mouthpieces or earpieces H04R1/14Throat mountings for microphones H04R1/16Mounting or connecting stylus to transducer with or without damping means H04R1/18Holders for styli Mounting holders on transducers H04R1/20Arrangements for obtaining desired frequency or directional characteristics H04R1/22for obtaining desired frequency characteristic only H04R1/222for microphones H04R1/225for telephonic receivers H04R1/227using transducers reproducing the same frequency band H04R1/24Structural combinations of separate transducers or of two parts of the same transducer and responsive respectively to two or more frequency ranges H04R1/245of microphones H04R1/26Spatial arrangements of separate transducers responsive to two or more frequency ranges H04R1/265of microphones H04R1/28Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances H04R1/2803for loudspeaker transducers H04R1/2807Enclosures comprising vibrating or resonating arrangements H04R1/2811for loudspeaker transducers H04R1/2815of the bass reflex type H04R1/2819for loudspeaker transducers H04R1/2823Vents, i.e. ports H04R1/2826for loudspeaker transducers H04R1/283using a passive diaphragm H04R1/2834for loudspeaker transducers H04R1/2838of the bandpass type H04R1/2842for loudspeaker transducers H04R1/2846Vents, i.e. ports H04R1/2849for loudspeaker transducers H04R1/2853using an acoustic labyrinth or a transmission line H04R1/2857for loudspeaker transducers H04R1/2861using a back-loaded horn H04R1/2865for loudspeaker transducers H04R1/2869Reduction of undesired resonances H04R1/2873for loudspeaker transducers H04R1/2876by means of damping material H04R1/288for loudspeaker transducers H04R1/2884by means of the enclosure structure H04R1/2888for loudspeaker transducers H04R1/2892Mountings or supports for transducers H04R1/2896for loudspeaker transducers H04R1/30Combinations of transducers with horns, e.g. with mechanical matching means H04R1/32for obtaining desired directional characteristic only H04R1/323for loudspeakers H04R1/326for microphones H04R1/34by using a single transducer with sound reflecting, diffracting, directing or guiding means H04R1/342for microphones H04R1/345for loudspeakers H04R1/347for obtaining a phase-shift between the front and back acoustic wave H04R1/36by using a single aperture of dimensions not greater than the shortest operating wavelength H04R1/38in which sound waves act upon both sides of a diaphragm and incorporating acoustic phase-shifting means H04R1/40by combining a number of identical transducers H04R1/403loud-speakers H04R1/406microphones H04R1/42Combinations of transducers with fluid-pressure or other non-electrical amplifying means H04R1/44Special adaptations for subaqueous use H04R1/46Special adaptations for use as contact microphones