| Patents for G10K 11 - Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general (21,150) |
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| 11/12/1991 | US5064890 Ethylene-vinyl acetate copolymer, iron oxide silicate sound barrier, fire-resistant fiber, and liquid rubber |
| 11/07/1991 | DE3444424A1 Wound filament-type transducer array - for multidirectional sonar antenna |
| 11/06/1991 | EP0455622A1 Intake silencer, in particular for two stroke internal combustion engines |
| 11/06/1991 | EP0455479A2 Active acoustic attenuation system with overall modeling |
| 11/06/1991 | EP0455273A2 Ultrasonic transducers for medical diagnostic examinations |
| 11/06/1991 | EP0454949A2 Air-conducted sound absorbing element |
| 11/06/1991 | CN1014641B Ultrasonic echograph and method of scanning object by means of such echograph |
| 11/05/1991 | US5063598 Active noise control system with two stage conditioning |
| 11/05/1991 | US5063542 Piezoelectric transducer with displacement amplifier |
| 11/05/1991 | US5063541 Beam forming method and apparatus therefor in ultrasonic imaging system |
| 11/05/1991 | US5063098 Vibration damping materials and soundproofing structures using such damping materials |
| 11/05/1991 | US5062429 Ultrasound imaging system probe with alternate transducer polling for common-mode noise rejection |
| 11/05/1991 | US5062300 Device for the ultrasonic non-destructive testing of tubes |
| 11/05/1991 | US5062299 Apparatus and method for detecting inhomogeneities in semi-plastic substances through ultrasound |
| 10/30/1991 | EP0454601A1 Process for damping acoustic waves in a circuit of circulating fluid |
| 10/30/1991 | EP0454342A2 An active noise cancellation apparatus |
| 10/30/1991 | EP0454341A2 An active noise cancellation apparatus |
| 10/30/1991 | EP0453941A1 Sound absorbing materials and processes for producing the same |
| 10/29/1991 | US5060652 Ultrasonic diagnosis apparatus |
| 10/29/1991 | CA1291543C Acoustical filter for suppressing or attenuating the negative alternations of an elastic wave and elastic wave generator including such a filter |
| 10/26/1991 | CA2038440A1 Active muffler transducer arrangement |
| 10/26/1991 | CA2038439A1 Active noise control system with two stage conditioning |
| 10/23/1991 | EP0453293A2 Sound field variable apparatus |
| 10/23/1991 | EP0452532A1 Ultrasonic diagnostic device |
| 10/23/1991 | EP0452370A1 Viscoelastic damping system |
| 10/23/1991 | CN2087374U Three-use silencer with low wind speed function |
| 10/22/1991 | US5060206 Marine acoustic aerobuoy and method of operation |
| 10/22/1991 | US5059946 Ultrasonic obstacle detector |
| 10/22/1991 | US5059851 Miniature ultrasound high efficiency transducer assembly, guidewire using the same and method |
| 10/22/1991 | US5058592 Adjustable mountable doppler ultrasound transducer device |
| 10/17/1991 | WO1991015896A1 Noise suppression system |
| 10/17/1991 | DE4012094A1 Underwater sonar detection prevention - involves covering submarine hull with material which absorbs sound waves |
| 10/17/1991 | DE4011658A1 Anti-sound wave generator - incorporates at least fluidic amplifier with input and output connections |
| 10/16/1991 | EP0452103A2 Microphone apparatus |
| 10/16/1991 | EP0451991A2 Speaker system and TV with the same |
| 10/16/1991 | EP0451966A2 Method and apparatus for digital phased array imaging |
| 10/16/1991 | EP0451517A1 Acoustic image acquisition |
| 10/16/1991 | EP0451463A2 Multiple transducer selector |
| 10/16/1991 | EP0289503B1 Sound emitter |
| 10/15/1991 | US5058170 Array microphone |
| 10/15/1991 | US5058081 Method of formation of channels for a sonar, in particular for a towed-array sonar |
| 10/15/1991 | US5057800 Apparatus and method for diffracting MSW in a garnet film using SAW |
| 10/15/1991 | US5056917 Lithotripter reflector inspection |
| 10/15/1991 | US5056466 Positioning means for an animal relative to automatic milking apparatus |
| 10/15/1991 | CA1290843C Hanging structure for coupling sismic sources with bonehole walls |
| 10/10/1991 | DE4011108A1 Shock wave focussing equipment - uses acoustic lens with index of refraction not constant in peripheral direction |
| 10/10/1991 | CA2040115A1 Noise suppression system |
| 10/09/1991 | EP0450029A1 Thermoplastic mass for applications of sound-proofing and vibration isolation and laminated and stratified materials obtained therefrom, particularly for motor vehicles |
| 10/08/1991 | US5056069 Ultrasonic sensor |
| 10/08/1991 | US5056067 Analog circuit for controlling acoustic transducer arrays |
| 10/08/1991 | US5056065 System for deploying horizontal line array |
| 10/08/1991 | US5054492 Ultrasonic imaging catheter having rotational image correlation |
| 10/07/1991 | WO1991015640A1 Portable acoustical panel structure |
| 10/07/1991 | CA2079878A1 Portable acoustical panel structure |
| 10/02/1991 | DE4010372A1 Hearing aid with in-ear insert - has ventilation channel with own transducer actively cancelling sound output |
| 10/01/1991 | US5052393 Ultrasound system with improved coupling fluid |
| 09/30/1991 | CA2013392A1 Acoustic sensing arrangements |
| 09/26/1991 | DE4109758A1 Loudspeaker unit with active auxiliary speaker - has two adjacent chambers with auxiliary speaker supported by common partition wall |
| 09/25/1991 | EP0448460A1 Suspension device for an acoustic base |
| 09/25/1991 | EP0448291A2 Ultrasonic probe having rotary refracting member |
| 09/25/1991 | EP0448121A2 Electronic noise attenuation method and apparatus for use in effecting such method |
| 09/25/1991 | EP0447797A2 Sound damping element |
| 09/24/1991 | US5052041 Silencer |
| 09/24/1991 | US5050588 High energy ultrasonic lens assembly with mounting facets |
| 09/24/1991 | US5050436 Ultrasonic probe and acoustic lens attachment |
| 09/24/1991 | CA2038462A1 Suspension device for acoustic base |
| 09/19/1991 | WO1991014259A1 Sonar array mounting for sonobuoy |
| 09/19/1991 | WO1991014176A1 Method and apparatus for the transmission of an acoustic signal in a photoacoustic cell |
| 09/19/1991 | WO1991014175A1 Ultrasonic testing machine with a rotor with a plurality of testing heads and a transmission device for connecting the testing heads to a stationary electronic device |
| 09/19/1991 | DE4007956A1 Non-destructive ultrasound testing head - comprises cylinder whose outlet tube has inner projecting end onto the centre line and has pressurised water jet directed on centre line |
| 09/18/1991 | EP0446917A2 Circuit for controlling tap gains at rapid speed in an adaptive filter |
| 09/18/1991 | EP0446533A2 Apparatus and method for detecting inhomogeneities in semi-plastic substances through ultrasound |
| 09/18/1991 | CN1054667A Reflecting sound microscope with acoustic mirror |
| 09/17/1991 | US5050137 Ultrasonic probe |
| 09/17/1991 | US5050128 Ultrasonic probe having an ultrasonic propagation medium |
| 09/17/1991 | US5048529 Ultrasonic transducer probe |
| 09/17/1991 | CA1289081C Masking sound device |
| 09/11/1991 | EP0446113A1 Method and apparatus for well logging using directional means for emission and/or reception |
| 09/11/1991 | EP0445907A2 A collision detector for a vehicle |
| 09/11/1991 | EP0445431A2 Resonator screen for a sound damping screen |
| 09/11/1991 | EP0423172A4 Active noise reduction system |
| 09/10/1991 | US5047996 Sonar transducer |
| 09/10/1991 | US5047736 Selective interference reduction in transmission lines |
| 09/10/1991 | US5046874 Impact printer print head with active sound pressure attenuation means |
| 09/10/1991 | US5046663 Heater |
| 09/10/1991 | US5046364 Hand-held ultrasonic probe |
| 09/10/1991 | CA1288701C Birefringent single-mode acoustic fiber |
| 09/07/1991 | CA2037655A1 Lossing device and method using directional emission and/or reception means |
| 09/04/1991 | EP0445019A2 Acoustic vibration reduction |
| 09/04/1991 | EP0444578A2 Ultrasonic squirter |
| 09/03/1991 | US5046103 Noise reducing system for voice microphones |
| 09/03/1991 | US5046055 Modification to towed array bulkheads |
| 09/03/1991 | US5044461 Decoupled borehole sensor |
| 09/03/1991 | US5044160 Mechanism for obtaining a motion of translation in a marine environment |
| 09/03/1991 | US5044053 Method of manufacturing a curved array ultrasonic transducer assembly |
| 08/29/1991 | DE4105443A1 Differential drive suspension for vehicles - has differential suspended via four bearings upon four separate support points, with two on one side of transverse plane and two on other |
| 08/29/1991 | DE4005743A1 Lithotriptor to destroy gallstones intra-or trans-luminally - has shock-wave generator, lead contg. incompressible material, and opt balloon to press generator against gall bladder |
| 08/28/1991 | EP0442969A1 Wholly microfabricated biosensors and process for the manufacture and use thereof |
| 08/27/1991 | US5043954 Apparatus for preventing turning-in and transmitter for vehicle |
| 08/27/1991 | US5043952 Monopole transmitter for a sonic well tool |