Matches 151 - 200 out of 339 < 1 2 3 4 5 6 7 >
Match Document Document Title
5396266 Kinesthetic feedback apparatus and method  
A kinesthetic feedback apparatus and method whereby braking forces are imposed on a hand-movable lever. The lever is either a joystick or a uniplanar lever, and the braking forces are imposed by a...
5386479 Piezoelectric sound sources  
A sound generator that has a plurality of acoustic piezoelectric transducers coupled to a single Helmholtz resonator. The resonant frequency of the Helmholtz resonator and each transducer can be...
5363452 Microphone for use in a vibrating environment  
A microphone for use in a harsh environment of intense vibration and sound pressure. A microphone transducer and an acceleration transducer are located adjacent each other inside of a housing. The...
5357578 Acoustic output device, and electronic apparatus using the acoustic output device  
Sound waves from a plate-shaped acoustic source, which generates fundamental waves (sound waves) having at least two frequencies, propagate through a propagating portion. The propagating portion...
5357232 Magnetostrictive element  
A magnetostrictive element includes a magnetostrictive member, an outer magnet disposed coaxially about, spaced apart from, and surrounding the magnetostrictive member, and a soft magnetic yoke for...
5345427 Ultrasonic transducer  
A phase-insensitive ultrasonic transducer has a zinc oxide single crystal as a piezoelectric semiconducting acoustoelectric element, providing high sensitivity and operable over a range of...
5339364 Device for conversion between electrical oscillations and acoustic waves  
A device for the conversion of electrical oscillations into acoustic waves or the conversion of acoustic waves into electrical oscillations, including an electro-acoustic converter and a housing...
5329499 Acoustic transmitter  
A drive package for acoustic transmitters includes a frame (6) of magnetic material with windows for accommodating driving members (20) and prestress devices (22) . Two windows with driving members...
5321761 Piezoelectric sound generator and method of its manufacture  
A piezoelectric sound generator includes a piezoelectric device consisting of a metal diaphragm and a piezoelectric porcelain plate affixed to the diaphragm, a pair of connecting members having...
5309519 Electroacoustic novelties  
An electroacoustic novelty, particularly to the brim on an article of headware, or to a flag, containing a piezoelectric polymer film, where means are electrically coupled with electrodes on the...
5295194 Multi-driver loudspeaker assembly  
A multi-driver, coaxially mounted loudspeaker array utilizing a high frequency bi-morph driving element (tweeter) that is preferably contained within the air-core of the voice coil former of a...
5291460 Piezoelectric sounding body  
Disclosed herein is a piezoelectric sounding body comprising a piezoelectric substrate, an electrode film provided on its surface and a vibrating plate provided on the electrode film through an...
5283835 Ferroelectric composite film acoustic transducer  
An acoustic transducer is formed by a rigid substrate and a strip of a laminated sheet material including an intermediate layer of a ferroelectrical material sandwiched between inner and outer...
5265165 Multipurpose headwear  
Headwear that produces sound from a signal is provided by an audio device in addition to the normal features of the headwear. The audio headwear of the present invention may be configured as a...
5245669 Electroacoustic transducer  
The invention relates to an improved piezoelectric loudspeaker for high frequency, more commonly known as a tweeter. The invention embraces a technological improvement which permits the size of the...
5231659 Telephone handset with transducer assembly  
The telephone handset is provided with at least one piezoelectric transducer (6, 7). The transducer is received in a housing part (2) which includes fixing means for the transducer and its...
5212736 Ribbon speaker  
A vibrating diaphragm is disposed in a magnetic gap. The diaphragm comprises two organic films superimposed on each other, and two metal films overlaid on the organic films, respectively. One of...
RE34219 Sound system  
A sound or acoustic system constructed entirely of magnetically inert components which remain unaffected by magnetic fields. A magnetically inert panel is provided, with at least one...
5196755 Piezoelectric panel speaker  
An acoustic transducer system includes a plurality of individual transflexural piezoelectric elements potted in a plastic or rubber compound. The panel is able to radiate broad-band, high intensity...
5195142 Piezoelectric transducer  
To reduce costs and improve piezoceramic transducers, use of a spool with nail-shaped contacts forced thereinto, pressed against the vibrating diaphragm by an elastic O-ring to eliminate solderings...
5193119 Multiple loudspeaker  
A multiple loudspeaker includes a housing and a first speaker (a woofer) supported by the housing. The first speaker includes a first diaphragm. A support for supporting a second speaker (a...
5185549 Dipole horn piezoelectric electro-acoustic transducer design  
A piezoelectric electro-acoustic device for converting an electric signal into an acoustic vibration and/or for converting acoustic vibrations into an electric signal is disclosed. The device...
5161200 Microphone  
The present invention is directed to a microphone in which all elements having mass which can affect the output of the microphone have a resonant frequency outside the frequency range of interest....
5157730 Pulse rate modulation type piezoelectric crystal driver device  
In a pulse rate modulation type driver device for driving a piezoelectric crystal so as to produce sound, a digitized sound signal input having a sign bit and a plurality of magnitude bits is...
5142510 Acoustic transducer and method of making the same  
An acoustic transducer which can be made small in size, i.e., in width, length and thickness, so as to fit into a credit card size package. The transducer comprises a flat frame having an opening...
5133018 Audio speaker connector employing concentrically oriented speaker contacts  
An audio speaker configured for simple manual or automatic robotic insertion into an enclosure aperture so that it will be electrically connected to an audio signal transmission medium and retained...
5103483 Spherical membrane omnidirectional loudspeaker using a magnetostrictive bimetallic strip  
The invention concerns an omnidirectional loudspeaker. This loudspeaker comprises a spherical membrane which includes spires formed of a strip (2) made of a magnetostrictive material, the spires...
5062139 Coaxial loud speaker system  
A multi-driver, coaxially mounted loud speaker array utilizing a high frequency bi-morph driving element that is totally contained within the hollow core of the voice coil former of a lower...
5031222 Piezoelectric speaker  
A piezoelectric speaker which generates sound by vibrating a plane diaphragm using a plurality of piezoelectric drivers is disclosed. The diaphragm is formed of resin foam plates and the...
5030872 Electro-acoustic transducer  
An electro-acoustic transducer having a circular transducer plate arranged in a transducer housing, clamped between two mounting members at its edge region, is provided with a piezoelectric layer....
5014321 Wide passband omnidirectional loudspeaker  
The invention relates to a wide passband omnidirectional loudspeaker which has particular application to high fidelity sound reproduction. The loudspeaker has a rigid, magnetostrictive, spherical...
4996713 Electroacoustic piezoelectric transducer having a broad operating range  
An electroacoustic piezoelectric transducer comprises a concave diaphragm and at least two planar bimorph elements having different respective resonance frequency characteristics coupled to the...
4990816 Piezoelectric capsule with resilient conducting holding means  
A piezoelectric capsule with resilient conducting holding means is disclosed, comprising a hollow metal lid (8) fitted on a base body (7) formed of a printed circuit, and a piezoelectric membrane...
4985926 High impedance piezoelectric transducer  
An improved bimorph piezoelectric transducer provides higher input impedance and allows operation at higher operating voltages. First and second piezoelectric elements have opposing electrode...
4978880 Piezoelectric capsule with flat supporting surface and resilient holding means  
A piezoelectric capsule with flat supporting surface and resilient holding means is disclosed, comprising a hollow metal lid (8) fitted on a base body (7) formed of a printed circuit, and a...
4979219 Piezoelectric speakers  
A piezoelectric speaker comprises a drive unit having an auxiliary diaphragm bonded with a piezoelectric transducer element for producing sound thereby and a horn member having a resonance device...
4965483 Piezoelectric buzzer  
A piezoelectric buzzer comprising a case having the shape of a bottomed cylinder, a piezoelectric diaphragm fixedly disposed within the case, a cover plate fitted in the open end of the case, and...
4949387 Electro-acoustic transducer unit  
An electro-acoustic transducer unit for use either as a microphone, a receiver or a voice frequency ringing transducer has a transducer plate fastened between bearing members provided with a...
4931765 Unitized housing for silent and tone pager alerting system  
A housing for an alerting system within a selective call radio receiver exhibits substantial space saving characteristics by incorporating both a low profile vibrator motor for silent alerting and...
4924503 Electroacoustic transducer  
In the case of an electroacoustic transducer with a supporting body carrying coil turns and in particular a vibrating hollow body with a curved surface, such as a magnetostrictive ball, in order to...
4918738 Structural assembly for housing an acoustical system  
An acoustical system for generating loud sound levels over a wider bandwidth includes a generally cylindrically-shaped cavity formed of a wall member and having front and back ends. A baffle member...
4907207 Ultrasound transducer having astigmatic transmission/reception characteristic  
A transducer which has an astigmatic directional characteristic which depends on its assymetrical stiffness or, respectively, speed of sound of the material of a resonant membrane (2) which is...
4885781 Frequency-selective sound transducer  
A frequency-selective sound transducer comprised of a number of resonators with differing but sequential natural frequencies arranged in a first plane. A deformable membrane is arranged in a second...
4866683 Integrated acoustic receiver or projector  
An acoustic element assembly used in underwater receivers and projectors comprises two piezoelectric elements bonded to opposite sides of a hybrid circuit substrate (16). The hybrid circuit...
4845776 Piezoelectric transducer and transformer circuit  
An electroacoustic piezoelectric transducer, particularly useful as a high frequency loudspeaker or tweeter, includes a concave diaphragm mounted in a housing along its periphery outwardly of a...
4843275 Air buoyant piezoelectric polymeric film microphone  
Piezoelectric polymer film, when conformably adhered to inner or outer surfaces of an inflated balloon, functions as a microphone when the pressure of sound waves causes the film to vibrate and...
4843628 Inertial microphone/receiver with extended frequency response  
An inertial transducer is provided comprising a housing containing therein a magnetic circuit including components thereof separated by a spring diaphragm wherein the flexing of the diaphragm...
4820952 Film speaker using a piezo-electric element  
A film speaker has a film diaphragm for transducing mechanical vibrations into sound waves and a plurality of piezo-electric elements for transducing electrical elements for transducing electrical...
4817152 Stereo system with piezo-electrical film speaker  
A stereo system produces stereo-phonic sound using a single piezo-electric film speaker. The arched film diaphragm of the speaker has one portion coupled to vibrate in response to a left stereo...
4811816 Symmetric double phonic diaphragm volume-enhancing device  
A device having two sets of oppositely facing corresponding resonance cavities; i.e., an upper and a lower resonance cavity. Each of the resonance cavities include a piezo-electric type diaphragm...
Matches 151 - 200 out of 339 < 1 2 3 4 5 6 7 >