| 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) |
|---|
| 08/27/1991 | US5043948 Borehole televiewer system |
| 08/27/1991 | US5042492 Probe provided with a concave arrangement of piezoelectric elements for ultrasound apparatus |
| 08/27/1991 | CA1288158C Dual axis transducer |
| 08/27/1991 | CA1288055C Acoustic wave absorbing wall covering in aqueous media |
| 08/22/1991 | WO1991013429A1 Noise reducing system |
| 08/22/1991 | WO1991012608A1 Repetitive phenomena cancellation arrangement with multiple sensors and actuators |
| 08/22/1991 | WO1991011960A1 High energy ultrasonic lens with mounting facets |
| 08/21/1991 | EP0442450A2 Variable origin - variable angle acoustic scanning method and apparatus |
| 08/21/1991 | EP0441997A1 Medical ultrasonic applicator for use in an acoustic shock-wave-conducting propagation-medium |
| 08/21/1991 | EP0396666A4 Selective active cancellation system for repetitive phenomena |
| 08/20/1991 | US5041849 Multi-discrete-phase Fresnel acoustic lenses and their application to acoustic ink printing |
| 08/20/1991 | US5041323 Honeycomb noise attenuation structure |
| 08/15/1991 | WO1991012093A1 Method and device for generating an ultrasonic wave |
| 08/15/1991 | CA2075049A1 Method and device for generating and ultrasonic wave |
| 08/14/1991 | EP0441137A1 Pipe arrangement between a master and slave cylinder of a hydraulic driven clutch placed in the transmission system of an automotive vehicle |
| 08/14/1991 | EP0441044A2 Synthetic aperture minimum redundancy sonar apparatus |
| 08/13/1991 | US5040156 Acoustic sensor device with noise suppression |
| 08/10/1991 | WO1991012579A1 Digital virtual earth active cancellation system |
| 08/08/1991 | WO1991011801A1 Ultrasonic applicator |
| 08/08/1991 | WO1991011145A1 Ultrasonic nondiffracting transducer |
| 08/08/1991 | DE4003521A1 Hydraulic clutch actuation system - has master cylinder connected to slave cylinder by two pipes to damp out vibration |
| 08/07/1991 | EP0440313A2 Ultrasonic detector, methods for searching a moving object, ultrasonic sensor unit, element for positioning an animal, terminal apparatus for an automatic milking system, and method for automatically milking an animal |
| 08/06/1991 | US5038067 Acoustic transducer |
| 08/06/1991 | US5036945 Sonic well tool transmitter receiver array including an attenuation and delay apparatus |
| 08/06/1991 | US5036855 Localization and therapy system for treatment of spatially oriented focal disease |
| 07/31/1991 | EP0439432A1 Sound absorbing heat shield |
| 07/31/1991 | EP0439239A1 Ultrasonic detector, methods for searching a moving object, ultrasonic sensor unit, element for positioning an animal, terminal apparatus for an automatic milking system, and method for automatically milking an animal |
| 07/31/1991 | EP0439197A2 A fiber reinforced composite material |
| 07/31/1991 | EP0438582A1 Light bulb shaped audio signal emitter |
| 07/31/1991 | EP0438562A1 Sonar surveying system |
| 07/31/1991 | EP0324785A4 Atmospheric variable compensation for an automated inspection system |
| 07/30/1991 | US5036542 Audio surveillance discouragement apparatus and method |
| 07/25/1991 | WO1991011078A1 Earphone device |
| 07/25/1991 | WO1991008843A3 Ultrasonic transducer for measuring air flow, in particular for measuring the air mass in internal combustion engines |
| 07/24/1991 | EP0437649A1 Method of ultrasound imaging |
| 07/23/1991 | US5034930 Passive ranging sonar system |
| 07/23/1991 | US5033579 Sound-and/or vibration-damping coating, element provided with said coating and process for applying the latter |
| 07/23/1991 | US5033456 Kidney stones |
| 07/23/1991 | CA1286765C Ultrasonic stylus position stabilizer |
| 07/17/1991 | EP0437046A2 Flexible acoustic baffle for staggered tube banks |
| 07/17/1991 | EP0436809A2 Ultrasonic transducer using piezoelectric elements |
| 07/17/1991 | EP0436685A1 An acoustic liner. |
| 07/16/1991 | US5033082 Communication system with active noise cancellation |
| 07/16/1991 | US5033032 Air-gap hydrophone |
| 07/16/1991 | US5031721 Sound absorption barriers |
| 07/16/1991 | US5031625 Received ultrasonic phase matching circuit |
| 07/13/1991 | CA2029226A1 Flexible acoustic baffle for staggered tube banks |
| 07/11/1991 | WO1991010226A1 Active vibration reducing system |
| 07/11/1991 | WO1991009728A1 Noise-damping combination |
| 07/10/1991 | CN1052786A Anti-noise protective device for ears |
| 07/09/1991 | US5029474 Transducer and method for acoustic emission (AE) testing |
| 07/03/1991 | EP0435753A1 Acoustic wave reflector for functioning at great depths of immersion |
| 07/03/1991 | EP0434931A2 Multi-discrete-phase Fresnel acoustic lenses and their applications to acoustic ink printing |
| 07/02/1991 | US5029218 Noise cancellor |
| 07/02/1991 | US5027822 Echography probe with improved connection circuit |
| 07/02/1991 | US5027821 Ultrasonic imaging apparatus |
| 07/02/1991 | US5027820 Device for the three-dimensional focusing of an ultrasonic beam |
| 07/02/1991 | US5027659 Ultrasonic imaging device in which electroacoustic transducers are disposed on a convex probe |
| 07/02/1991 | US5027644 Method and apparatus for injecting acoustic signals into live gas mains |
| 07/02/1991 | CA1285496C Machine, especially packaging machine |
| 06/30/1991 | CA2032715A1 Acoustic wave reflector capable of operating under large water pressures |
| 06/27/1991 | WO1991009214A1 Attenuation of dynamic pressure fluctuations in ducts |
| 06/27/1991 | WO1991008843A2 Ultrasonic transducer for measuring air flow, in particular for measuring the air mass in internal combustion engines |
| 06/27/1991 | WO1991007741A3 Resonance oscillator |
| 06/27/1991 | DE4039410A1 Shock wave generator for generating focussed shock waves - has acoustic lens between pressure pulse source and reflector surface enabling rapid focus zone displacement |
| 06/27/1991 | DE4039408A1 Shock wave generator with reflector - has several reflector sections, each associated with different focus zone enabling rapid focus zone displacement |
| 06/26/1991 | EP0434468A2 Vibration control system |
| 06/26/1991 | EP0433652A2 Method and apparatus for compensation of sensitivity variations |
| 06/26/1991 | EP0433492A1 Ultrasonic device for the virtual reduction of the array partition of a connectable transducer array |
| 06/26/1991 | EP0433331A1 Noise reduction in vehicle cabins |
| 06/25/1991 | US5025888 Acoustic liner |
| 06/25/1991 | US5025887 Sanitary acoustic horn |
| 06/25/1991 | US5025666 Transducer with built-in printed circuit board |
| 06/20/1991 | DE3941933A1 Ultraschallwandler fuer luftstroemungsmessung insbesondere zur luftmengenmessung bei verbrennungsmotoren Ultrasonic transducer for luftstroemungsmessung particular for air flow measurement for internal combustion engines |
| 06/20/1991 | DE3941634A1 Schallisolierte halterung eines ultraschallwandlers Soundproofed holder of an ultrasonic converter |
| 06/19/1991 | EP0432771A1 Three-dimensional ultrasonic scanner |
| 06/18/1991 | US5025424 Shock wave scoring apparatus employing curved rod sensors |
| 06/18/1991 | US5024288 Sound attenuation apparatus |
| 06/18/1991 | US5024094 Ultrasonic imaging system of bonding zone |
| 06/18/1991 | US5024092 Method and apparatus for selective transmission and reflection of sound through a solid |
| 06/16/1991 | WO1991009279A1 Soundproofed holding device for an ultrasonic transducer |
| 06/16/1991 | CA2071828A1 Soundproofed holding device for an ultrasonic transducer |
| 06/12/1991 | EP0175685B1 Rotary ultrasonic scan head including fluid drive |
| 06/11/1991 | US5022486 Sound reproducing apparatus |
| 06/09/1991 | WO1991009396A1 Loudspeaker and horn therefor |
| 06/06/1991 | DE4038301A1 Suppressing motor vehicle bodywork vibration by alternator excitation - pulse width modulating field current supplied by proportional controller comparing measured and desired accelerations |
| 06/06/1991 | DE4036442A1 Focused shock wave generator with two focusing reflectors - retractable from working position in field of concave conical radiating surface coupled to transducer |
| 06/06/1991 | DE4036441A1 Versatile ultrasonic pulse generator for surgical use - has generators on same axis as scanning transducer |
| 06/05/1991 | EP0430450A2 2-D phased array ultrasound imaging system with distributed phasing |
| 06/05/1991 | EP0429799A1 Ultrasound imaging method and apparatus |
| 06/05/1991 | EP0429510A1 Signal processing means for sensing a periodic signal in the presence of another interfering periodic noise |
| 06/04/1991 | US5022082 Active acoustic attenuation system with reduced convergence time |
| 06/04/1991 | US5022014 Ultrasonic temperature sensors, and ultrasonic waveguide connectors for use therewith |
| 06/04/1991 | US5022012 Underwater, cable suspended hydrophone |
| 06/04/1991 | US5020630 Loudspeaker and horn therefor |
| 06/04/1991 | US5020539 Ultrasonic endoscope apparatus |
| 06/04/1991 | US5020477 Automatic milking device and method of operation thereof |
| 05/30/1991 | WO1991007741A2 Resonance oscillator |
| 05/29/1991 | EP0429322A1 Sound-insulated ventilator with automatic air regulation |
| 05/29/1991 | EP0429121A1 Loudspeaker system comprising a Helmholtz resonator coupled to an acoustic tube |