| Patents for H04R 1 - Details of transducers (42,173) |
|---|
| 02/15/1994 | US5287412 Arrangement for reproducing bass tones in a vehicle |
| 02/15/1994 | US5286928 Tunable speaker tube |
| 02/15/1994 | CA1327020C Speaker system |
| 02/09/1994 | EP0582404A2 Telephonic headset structure for reducing ambient noise |
| 02/09/1994 | EP0582120A1 Coaxial speaker unit |
| 02/09/1994 | EP0582119A1 Tagboard for loudspeakers |
| 02/09/1994 | CN2155645Y Cross-compensating speaker |
| 02/08/1994 | US5285501 Vehicular rear shelf speaker apparatus with automatic deoderizing fluid dispenser |
| 02/08/1994 | US5285424 Wide bandwidth fiber optic hydrophone |
| 02/08/1994 | US5285025 Loudspeaker horn |
| 02/08/1994 | US5285024 Microphone |
| 02/08/1994 | US5284222 Speaker cabinet |
| 02/03/1994 | WO1994003025A1 Speaker system |
| 02/03/1994 | WO1994003024A1 Loudspeaker |
| 02/03/1994 | DE4308961A1 Vorrichtung zur aktiven Simulation einer akustischen Impedanz An active simulation of an acoustic impedance |
| 02/02/1994 | EP0580808A1 Expandable sonar array. |
| 02/02/1994 | EP0580579A1 Improvements in and relating to transmission line loudspeakers |
| 02/02/1994 | CN2155116Y Combined speaker |
| 02/01/1994 | USRE34525 Motorcycle helmet microphone mount and plug mount |
| 02/01/1994 | US5283836 Audio transducer |
| 02/01/1994 | US5283835 Ferroelectric composite film acoustic transducer |
| 02/01/1994 | CA2075086A1 Telephone handset cushion |
| 02/01/1994 | CA2043718C Speaker system enclosure integrated with amplifier circuit board |
| 01/27/1994 | DE4224811A1 Spherical loudspeaker box turned from bonded wooden block - bonds wooden hemispherical half shells turned inside and out to form hollow spherical box into which loudspeaker can be mounted |
| 01/26/1994 | EP0580156A2 Underwater low-frequency sound producer using a rare earth alloy |
| 01/26/1994 | CN2154576Y Speech sounds sensor |
| 01/26/1994 | CN2154575Y 并联话筒 Parallel Microphone |
| 01/25/1994 | US5282253 Bone conduction microphone mount |
| 01/25/1994 | US5282251 Speaker device for the hearing impaired |
| 01/25/1994 | US5282245 Tubular bi-directional microphone with flared entries |
| 01/25/1994 | US5281777 For a loudspeaker |
| 01/19/1994 | EP0579238A1 Headphone |
| 01/19/1994 | EP0578752A1 Inconspicuous communication method utilizing remote electromagnetic drive. |
| 01/19/1994 | CN2153919Y Glass fibre reinforced plastic complex structure sound box body |
| 01/19/1994 | CN1081057A Loudspeakers |
| 01/18/1994 | US5280651 Portable sound system having a detachable headset for selectively engaging the body to form a carrying handle |
| 01/18/1994 | US5280524 Bone conductive ear microphone and method |
| 01/17/1994 | CA2094794A1 Two-way communications earset |
| 01/12/1994 | EP0577601A1 Sound output device |
| 01/12/1994 | CN2153191Y Sterilization microphone cover |
| 01/11/1994 | US5278361 Loudspeaker system |
| 01/11/1994 | US5278360 Hearing aid wax guard with integral bridge |
| 01/06/1994 | WO1994000961A1 Water-resistant transducer housing with hydrophobic vent |
| 01/06/1994 | WO1994000089A1 Hearing protector |
| 01/05/1994 | EP0577123A1 Composite jacket component for use in audio equipment |
| 01/05/1994 | EP0576657A1 A tilt adjuster for a speaker support frame |
| 01/05/1994 | DE4223572C1 Sound generation in appts. telephone receivers - has loudspeaker chamber coupled to resonator formed by length of tubing to correct low frequency characteristic |
| 01/04/1994 | US5276740 Earphone device |
| 01/04/1994 | US5276276 Coil transducer |
| 01/04/1994 | CA1325843C Stereo headphone |
| 01/02/1994 | CA2099051A1 Composite jacket component for use in audio equipment |
| 12/29/1993 | EP0576216A2 Method of compensating for a change in sound pressure characteristic with temperature of an electoacoustic transducer |
| 12/29/1993 | CN2151601Y Outdoor speaker |
| 12/28/1993 | US5274709 Speaker device for television receiver |
| 12/28/1993 | US5273243 Radio speaker mounting apparatus and method |
| 12/23/1993 | WO1993026134A1 Stereophonic sound reproduction device using several loudspeakers in each channel |
| 12/23/1993 | CA2137695A1 Strereophonic sound reproduction device using several loudspeakers in each channel |
| 12/22/1993 | EP0574578A1 Speaker cover assembly |
| 12/22/1993 | EP0574577A1 Speaker support frame |
| 12/22/1993 | CN2150695Y Stereophonic sound reproducing device |
| 12/22/1993 | CN2150694Y Energy-storage type phase inverting sound box |
| 12/22/1993 | CN2150693Y Super-low voice box |
| 12/22/1993 | CN2150692Y Rubber tube acoustic-conducting insert earphone |
| 12/22/1993 | CN2150691Y Composite microphone |
| 12/21/1993 | US5272758 Electret condenser microphone unit |
| 12/21/1993 | CA1325471C Loudspeaker system with wide dispersion baffle |
| 12/15/1993 | CN2149738Y Health-protection type wide frequency ear-phone |
| 12/12/1993 | CA2071040A1 Earphone-type speaker assembly |
| 12/07/1993 | US5268965 User selectable noise canceling for portable microphones |
| 12/07/1993 | US5268538 Hemispherically wide-radiating-angle loudspeaker system |
| 12/02/1993 | DE4217361A1 Protective hygienic element for earphones or headphones - has large hole fitting over headphone and small hole fitting over ear preventing contact between user and headphone |
| 12/01/1993 | CN2148447Y Sound signal volume regulating device |
| 12/01/1993 | CN1079098A Acoustic bottle system |
| 11/30/1993 | US5267223 Electroacoustic transducer seal |
| 11/30/1993 | US5266752 Reflex folded horn speaker enclosure |
| 11/30/1993 | US5266751 Cluster of loudspeaker cabinets having adjustable splay angle |
| 11/30/1993 | CA2021816C Loudspeaker system |
| 11/25/1993 | WO1993023966A1 Loudspeaker cone suspension rim having integral gasket |
| 11/25/1993 | WO1993023944A1 Bone conductive ear microphone and method |
| 11/25/1993 | WO1993023942A1 Unidirectional ear microphone and method |
| 11/25/1993 | WO1993023178A1 Low frequency sonar projector and method |
| 11/25/1993 | CA2135175A1 Bone conductive ear microphone and method |
| 11/24/1993 | CN1022882C Capacitor microphone cartridge |
| 11/23/1993 | US5265165 Multipurpose headwear |
| 11/16/1993 | US5263093 Microphone device in use in for communication apparatus for motorcycle |
| 11/11/1993 | WO1993022889A1 Method and acoustic system for sonification of enclosed and open spaces |
| 11/11/1993 | WO1993022888A1 Protection cover for telephones |
| 11/11/1993 | WO1993022887A1 Single use protector for telephone ear piece |
| 11/10/1993 | EP0569216A1 Microphone apparatus |
| 11/10/1993 | EP0568716A1 Loudspeaker system |
| 11/10/1993 | EP0518906B1 Earwax trap for use with hearing-aid apparatus, and hearing-aid apparatus with such a trap |
| 11/10/1993 | CN2146095Y Loud speaker box frame |
| 11/10/1993 | CN2146094Y Telephone headset |
| 11/09/1993 | US5261006 Loudspeaker system comprising a helmholtz resonator coupled to an acoustic tube |
| 11/09/1993 | US5260997 Articulated headset |
| 11/09/1993 | US5260920 Acoustic space reproduction method, sound recording device and sound recording medium |
| 11/09/1993 | US5260681 Paging receiver with resonant box |
| 11/03/1993 | EP0568205A1 Sonar transducer assembly |
| 11/03/1993 | EP0567706A2 Compressible ear tip |
| 11/03/1993 | CN2145484Y Joint apparatus of microphone and connection |