Did You Know...
...that the Eveready Battery began as an invention called the "electric flowerpot," which was a tube with a battery and light bulb inside? The idea was to fasten this gizmo to the side of a flowerpot so it would illuminate the flowers from the bottom. The idea died on the vine and the businessman who licensed the flower pot, Conrad Huber, was left with a pile of useless tubes -- until he found a way to market them as batteries to light the world!
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| Number | Title | Issue Date |
| 7436736 | Hydrophone array module A hydrophone array includes hydrophones having an electret means and may have TFT FETs to generate current in response to received longitudinal wave signals. The arrangement may also be used to transmit longitudinal wave signals. Storage capacitors may be coupled to... | 10/14/2008 |
| 7412763 | Method of making an acoustic assembly for a transducer A method of making an acoustic assembly for use in a transducer includes forming a multi-layer assembly. The multi-layer assembly includes a first layer member and a second layer member. Each member includes a center portion, an edge portion and an aperture separati... | 08/19/2008 |
| 7322930 | Implantable microphone having sensitivity and frequency response Implantable microphone devices that may be utilized in hearing systems are provided. An implantable microphone device allows the implantable microphone's frequency response and sensitivity to be selected. A microphone device with an increased membrane flexibility an... | 01/29/2008 |
| 7292700 | Microphone for a hearing aid A microphone assembly having a housing, a transducer, and an electronic circuit. The housing has an opening, and the transducer is disposed within that opening. The electronic circuit covers the opening such that the transducer is surrounded by at least the electron... | 11/06/2007 |
| 7204009 | Manufacturing method of acoustic sensor The present invention relates to a semiconductor electret condenser microphone capable of being reduced in size and including an acoustic sensor 100 and a case 200 for accommodating the acoustic sensor 100, the acoustic sensor 100 has a s... | 04/17/2007 |
| 7190803 | Acoustic transducer having reduced thickness A transducer for a hearing aid includes a housing, a relatively thin membrane having a free end suspended in the housing for vibration in response to a motor. The motor has a coil and a magnet assembly, the coil being mounted in the housing beneath the membrane; the... | 03/13/2007 |
| 7142682 | Silicon-based transducer for use in hearing instruments and listening devices A silicon-based transducer assembly coupled to a movable structure in a hearing instrument. The transducer assembly includes at least one microphone chip and an ASIC having multiple integrated components such as any combination of a DSP, an A/D converter, an amplifi... | 11/28/2006 |
| 7120087 | Electronics-carrying module An electronic-carrying module (640), for example for use with a seismic data acquisition cable (400), is disclosed. The preferred electronic-carrying module (640) includes, first, an electronics carrier (106) having access means (107 | 10/10/2006 |
| 7087023 | Microfabricated ultrasonic transducers with bias polarity beam profile control and method of operating the same A capacitive microfabricated ultrasonic transducer with control of elevation phase through alternating bias polarity is disclosed. Such control of elevation phase results in simple ultrasonic probes with excellent slice thickness attributes. Furthermore, tight spati... | 08/08/2006 |
| 7080442 | Manufacturing method of acoustic sensor The present invention relates to a semiconductor electret condenser microphone capable of being reduced in size and including an acoustic sensor 100 and a case 200 for accommodating the acoustic sensor 100, the acoustic sensor 100 has a s... | 07/25/2006 |
| 7072482 | Microphone with improved sound inlet port A microphone comprises a housing defining an inner volume and including a first exterior surface with an aperture leading to the inner volume. The microphone includes a transducing assembly within the housing for converting sound into an electrical signal. A sound i... | 07/04/2006 |
| 7065224 | Microphone for a hearing aid or listening device with improved internal damping and foreign material protection A microphone and method for dampening the frequency response of the microphone by disposing a dampening frame in a rear volume of the microphone. The microphone generally includes a housing, a diaphragm, a damping frame, and a backplate. The diaphragm rests on embos... | 06/20/2006 |
| 7035167 | Seismic sensor A seismic sensor, has a case, a pre-charged, non-conductive membrane located between two plates that form a capacitor and accommodated inside the case, with one of the plates being immovable relative to the case and the other of the plates being movable relative to ... | 04/25/2006 |
| 7030536 | Micromachined ultrasonic transducer cells having compliant support structure A micromachined ultrasonic transducer array comprising a multiplicity of cMUT cells built on a substrate. Each cMUT cell comprises a compliant support structure built on the substrate, a membrane supported over a cavity by the compliant support structure, a first el... | 04/18/2006 |
| 7016262 | Seismic sensor A seismic sensor, comprising a case, a pre-charged, non-conductive membrane located between two plates that form a capacitor and accommodated inside the case, with one of the plates being immovable relative to the case and the other of the plates being movable relat... | 03/21/2006 |
| 7003127 | Hearing aid with large diaphragm microphone element including a printed circuit board A disposable-type hearing aid uses a relatively large single diaphragm or a large single diaphragm subdivided into a plurality of smaller active diaphragm areas obtained using a grate-like back support plate with ridges which contact and divide the diaphragm into th... | 02/21/2006 |
| 6950529 | System consisting of a microphone and an amplifier Microphone/amplifier system in which the microphone comprises a case with an inlet opening, a diaphragm and a backplate, and the amplifier is arranged in the case and is coupled to the diaphragm/backplate system. In the case, the diaphragm forms a first partition be... | 09/27/2005 |
| 6937735 | Microphone for a listening device having a reduced humidity coefficient A microphone is constructed to be more tolerant to a wide range of relative humidity conditions without adversely affecting the performance of the microphone. The microphone includes a housing with a sound port for receiving sound and an electret assembly for conver... | 08/30/2005 |
| 6928720 | Method of manufacturing a surface acoustic wave device A surface acoustic wave device includes a piezoelectric substrate and at least one interdigital electrode disposed on the piezoelectric substrate. The interdigital electrode is made of α-tantalum. ... | 08/16/2005 |
| 6870939 | SMT-type structure of the silicon-based electret condenser microphone This invention mainly provides a SMT-type structure of the minimized and low-power silicon-based electret condenser microphone. Primarily integrates with the electret, silicon-based, MEMS and microphone techniques to implement the minimized and low-power silicon-bas... | 03/22/2005 |
| 6806593 | Thin film electret microphone An electret formed by micro-machining technology on a support surface, including a self-powered electret sound transducer, preferably in the form of a microphone, formed by micro-machining technology. Each microphone is manufactured as a two-piece unit, comprising a... | 10/19/2004 |
| 6792123 | Electroacoustic transducer An electrostatically operating electroacoustic transducer, operating as a sound receiver and configured to be mounted in a microphone capsule, has an electrode and a diaphragm connected to one another at a spacing from one another by a spacer ring, wherein on the el... | 09/14/2004 |
| 6694032 | Electret condenser microphone The present invention relates to an electret condenser microphone including the vibratory diaphragm which is comprised of an electret film into which an electric charge is charged; a conductive film formed on one side of the electret film and a polar ring... | 02/17/2004 |
| 6678383 | Capacitor microphone A capacitor microphone includes a case having an end wall defining an opening for a sound hole, a capacitor portion comprising a diaphragm, a back plate and a spacer, the diaphragm opposing to the back plate via the spacer, the capacitor portion being acc... | 01/13/2004 |
| 6632178 | Fabrication of capacitive micromachined ultrasonic transducers by micro-stereolithography An ultrasonic transducer is formed by a plurality of cMUT cells, each comprising a charged diaphragm plate capacitively opposing an oppositely charged base plate. The cMUT cells can be fabricated by conventional semiconductor processes and hence integrate... | 10/14/2003 |
| 6243474 | Thin film electret microphone A small, inexpensive, high quality electret formed by micro-machining technology on a support surface, and further including a small, inexpensive, high quality, self-powered electret sound transducer, preferably in the form of a microphone, formed by micr... | 06/05/2001 |
| 6201874 | Electrostatic transducer with nonplanar configured diaphragm An electrostatic transducer having respective first and second stators, each having an interior surface, which are displaced and juxtaposed, and including a flexible diaphragm leaving a conductive layer and being operable as an electrostatic emitter. The ... | 03/13/2001 |
| 6169810 | Electroacoustic transducer An electroacoustic transducer of the electret type, having a backplate situated above a diaphragm, with the backplate being provided with spacers. The diaphragm is clamped on a frame-shaped carrier located at an underside of the diaphragm. The carrier is ... | 01/02/2001 |
| 6111966 | Capacitor microphone The invention relates to a capacitor microphone having a housing, a first membrane, a backplate electrode associated with this membrane, and an opening through which sound can reach the membrane. It is therefore the task of the invention to provide an eff... | 08/29/2000 |
| 5982709 | Acoustic transducers and method of microfabrication There is provided an acoustic transducer which includes a membrane of selected size and shape supported at its edges spaced from a first conductive electrode by an integral support structure with the second conductive electrode comprising a thin metal fil... | 11/09/1999 |
| 5757090 | Folded dielectric film element and method for maufacturing the same A folded dielectric film element is provided which converts energy. The film element includes at least one dielectric film that is bent into folds and provided with electrodes. The electrodes are arranged in the folds so that different electrodes are plac... | 05/26/1998 |
| 5255246 | Electroacoustic transducer of the electret type An electroacoustic transducer of the electret type, comprising a case (101) having an opening (102) via which the interior of the case communicates with the surroundings; a backplate (105) and a diaphragm (107) arranged opposite the backplate in the case,... | 10/19/1993 |
| 5046057 | Marine streamer cable A marine seismic cable comprising a core, a body of flotation material positioned around the core, an acoustic energy transducer positioned proximate the core, and a body of acoustically transparent material positioned around the acoustic energy transduce... | 09/03/1991 |
| 4910840 | Electroacoustic transducer of the so-called "electret" type, and a method of making such a transducer This invention provides an electroacoustic transducer and a method of making it. The transducer according to the invention comprises a substrate of a semiconductor material with a recessed portion. A membrane is stretched across the recessed portion, whic... | 03/27/1990 |
| 4908805 | Electroacoustic transducer of the so-called "electret" type, and a method of making such a transducer This invention provides an electroacoustic transducer and a method of making it. The transducer according to the invention comprises a substrate of a semiconductor material with a recessed portion. A membrane is stretched across the recessed portion, whic... | 03/13/1990 |
| 4730283 | Acoustic transducer with improved electrode spacing An acoustic transducer with an improved electret assembly mounting for providing spacings between the fixed and movable electrodes, and having as one feature the lowering of the undesired capacitance therebetween.... | 03/08/1988 |
| 4653036 | Transducer hydrophone with filled reservoir A hydrophone device with one or more very small active spots located on a large continuous ferroelectric sheet, such as PVDF, overcomes many of the problems in prior art constructions associated with the high dielectric constant of various media in which ... | 03/24/1987 |
| 4517665 | Acoustically transparent hydrophone probe An acoustically transparent hydrophone probe consisting of a rigid hoop structure in which is secured an assembly of very thin piezoelectric polymer sheet material, such as polyvinylidene fluoride, with one or more very small central sensitive portions. I... | 05/14/1985 |
| 4433400 | Acoustically transparent hydrophone probe An acoustically transparent hydrophone probe consisting of a rigid hoop structure in which is secured an assembly of very thin piezoelectric polymer sheet material, such as polyvinylidene fluoride, with one or more very small central sensitive portions. I... | 02/21/1984 |
| 4370182 | Method of making tape transducer A method of continuously making a composite tape transducer consisting of the steps of electrically charging dielectric layers on opposite sides of a conductive inner strip to form electrets, applying wider outer laminates symmetrically to opposite sides ... | 01/25/1983 |
