| Patent Number |
Title Of Patent |
Date Issued |
| RE33718 |
Acoustic transducer with improved electrode spacing |
October 15, 1991 |
| 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. |
| D414493 |
Microphone housing |
September 28, 1999 |
|
| D360949 |
Hearing aid receiver |
August 1, 1995 |
|
| D360948 |
Hearing aid receiver |
August 1, 1995 |
|
| D360691 |
Hearing aid receiver |
July 25, 1995 |
|
| 7065220 |
Microphone array having a second order directional pattern |
June 20, 2006 |
| A directional microphone system is disclosed, which comprises circuitry for low pass filtering a first order signal, and circuitry for high pass filtering a second order signal. The system further comprises circuitry for summing the low pass filtered first order signal and the high pass |
| 6985598 |
Programming system for programming hearing aids |
January 10, 2006 |
| A system for programming hearing aids utilizing a multi-electrode programming strip. The strip is removably attached to a connector and inserted into the aid through a narrow slot in the faceplate; the slot is bounded by the faceplate and by one of the edges of the battery door. When |
| 6654477 |
Receiver and method of construction |
November 25, 2003 |
| A receiver for converting electrical energy to acoustical energy, and a method of manufacturing the receiver, are disclosed. The receiver comprises an armature having a peripheral edge, a magnet stack and a weld joint for attaching the armature to the magnet stack at the peripheral e |
| 6130953 |
Headset |
October 10, 2000 |
| A headset including a housing, a resilient, convex headband fixed to the housing, an earphone fixed to the housing and displaceable relative to one end of the headband and a microphone fixed to a swivel arm that is on the housing. The headband has two spaced hinge joints arranged such th |
| 6041131 |
Shock resistant electroacoustic transducer |
March 21, 2000 |
| The present invention relates to a hearing aid receiver (10) having a coil (12) with a tunnel (14) therethrough, a magnetic structure (16) having a central magnetic gap (18), an armature (20), and a fluid (30, 32) with a viscosity greater than air to provide shock protection to the recei |
| 6028502 |
Potentiometer detent |
February 22, 2000 |
| A potentiometer is disclosed that provides a user with tactile feel while making adjustments. The potentiometer includes a housing having a central bore with a rotor extending therein. A knob having a protrusion is operably connected to the rotor along with a wiper. A detent member havin |
| 5990425 |
Programmable electrical switch |
November 23, 1999 |
| A programmable electrical switch having a housing and a plurality of single-switch-position conducting leads which are positioned in two substantially aligned rows is disclosed. Each of the leads has a proximal end that is disposed within the housing and a distal end that extends out |
| 5960093 |
Miniature transducer |
September 28, 1999 |
| A miniature transducer such as for an in-the-canal hearing aid, is disclosed. The transducer comprises a housing formed of a top cup joined to a bottom cup and defines an interior and an exterior. The bottom cup includes a base surface and a plurality of interconnected walls. The tra |
| 5870482 |
Miniature silicon condenser microphone |
February 9, 1999 |
| Multiple embodiments of a solid state condenser transducer, and methods of manufacture, are disclosed. The transducer comprises a semi-conductor substrate forming a frame and having an opening, a thin-film cantilever structure forming a diaphragm extending over a portion of the opening, |
| 5861779 |
Impedance circuit for a miniature hearing aid |
January 19, 1999 |
| An impedance matching, reducing, or buffering circuit for permitting smooth signal flow from a first transmission medium to a second transmission medium. The circuit provides a first node adapted for coupling to the first transmission medium and for receiving a signal from the first |
| 5740261 |
Miniature silicon condenser microphone |
April 14, 1998 |
| A housing for shielding a transducer of the type mounted on a silicon die attached to a flexible circuit. The housing provides a jacket which protects the silicon die from physical damage. The jacket, in cooperation with the top and bottom cups, further provides a shield for the silicon |
| 5692060 |
Unidirectional microphone |
November 25, 1997 |
| A unidirectional microphone assembly for receiving sound within a range of sound frequencies is disclosed. The microphone assembly comprises a housing formed of a sound absorbing material. The housing has an outer surface, and a bore extending inwardly along a bore axis from the outer |
| 5559892 |
Impedence buffering MOS circuit with dynamically reduced threshold voltage, as for use in an out |
September 24, 1996 |
| A buffer circuit, such as for use with a low voltage hearing aid, is disclosed. The hearing aid comprises a microphone, a receiver and an amplifier. The amplifier is disposed between the microphone and the receiver. The buffer circuit has a MOS device including a well terminal and a |
| 5548658 |
Acoustic Transducer |
August 20, 1996 |
| An electret assembly for a microphone is disclosed. The microphone is adapted for use with a hearing aid. The electret assembly comprises a motor ring having first and second opposing peripheral surfaces and an aperture extending therebetween. The motor ring includes four generally c |
| 5490220 |
Solid state condenser and microphone devices |
February 6, 1996 |
| A solid state miniature condenser and condenser microphone of good sensitivity is disclosed. The microphone comprises a fixed perforated backplate that constitutes a fixed electrode in a parallel plate condenser, a diaphragm sensitive to incident sound pressure waves that constitutes |
| 5446413 |
Impedance circuit for a miniature hearing aid |
August 29, 1995 |
| An impedance matching, reducing, or buffering circuit for permitting smooth signal flow from a first transmission medium to a second transmission medium. The circuit provides a first node adapted for coupling to the first transmission medium and for receiving a signal from the first |
| 5408534 |
Electret microphone assembly, and method of manufacturer |
April 18, 1995 |
| An electret microphone assembly, such as for a hearing aid comprises an electret microphone having a diaphragm and a charged plate, a substrate spaced from the charged plate, and a wire loop having first and second ends and a mid-portion. The first and second ends are secured to the |
| 5353244 |
Computer controlled transversal equalizer |
October 4, 1994 |
| An adjustable equalizer network has a series chain of N all pass amplifier stages driving N+1 scaling circuits connected to a final summing circuit that includes circuitry to adjust the frequency response at M+1 frequency control points to obtain a predetermined ripple free minimum phase |
| 5337011 |
Pre-amplifier |
August 9, 1994 |
| A tiny pre-amplifier for a small, low voltage, high impedance signal source, usually an electret microphone, exhibiting near unity gain, has an input cascode stage connected to the microphone and a matched balancing cascode stage; both cascode stages are energized from the same power |
| 5335286 |
Electret assembly |
August 2, 1994 |
| A tiny electret assembly for an electroacoustic hearing aid transducer, either a microphone or a sound reproducer, includes a thin, flexible, planar diaphragm and a planar backplate, the diaphragm and the backplate constituting the electret electrodes. One of the two electrodes is pe |
| 5319717 |
Hearing aid microphone with modified high-frequency response |
June 7, 1994 |
| A microphone for a hearing aid having a modified high frequency response is disclosed. The hearing aid comprises a hollow housing having an upper wall, a lower wall and a depending wall disposed between the upper wall and the lower wall. The upper, lower and depending walls define a main |
| 5297075 |
Computer controlled transversal equalizer |
March 22, 1994 |
| An adjustable equalizer network has a series chain of N all pass amplifier stages driving N+1 scaling circuits connected to a final summing circuit that adjusts the frequency response at M+1 frequency control points to obtain a predetermined ripple free minimum phase shift frequency resp |
| 5259035 |
Automatic microphone mixer |
November 2, 1993 |
| An automatic microphone mixer for a multi-microphone audio system in which each microphone audio channel is provided with a control channel including a comparator that compares the microphone output, as an A.C. signal, with a D.C. threshold signal, and that switches the microphone channe |
| 5222050 |
Water-resistant transducer housing with hydrophobic vent |
June 22, 1993 |
| An immersion-resistant housing adapted to receive a vibratable diaphragm spanning the interior of the housing to divide the housing into first and second chambers includes a first port communicating between the first chamber and the exterior environment. The first port is configured as a |
| 5193116 |
Hearing and output transducer with self contained amplifier |
March 9, 1993 |
| An integrated hearing aid receiver is disclosed. The receiver comprises a housing having first and second outlet ports. Disposed within the housing is a diaphragm defining an output chamber and a motor chamber. An armature is disposed within the motor chamber, and has an operative elemen |
| 5101435 |
Combined microphone and magnetic induction pickup system |
March 31, 1992 |
| An ear insertable hearing aid having both a miniature microphone and a magnetic induction pickup which can be used simultaneously or alternately. The invention includes a core for the magnetic induction device that maximizes the surface area usable for sensing changes in magnetic flux bu |
| 5083095 |
Plural source follower amplifier |
January 21, 1992 |
| An amplifier having improved input impedance and reduced susceptibility to power supply ripple, particularly suited for use with a high impedance signal source, utilizes at least two field-effect transistors; the signal source is connected to the gate of the first FET, which is connected |
| 5068901 |
Dual outlet passage hearing aid transducer |
November 26, 1991 |
| An improved high-frequency characteristic is achieved, in an otherwise conventional hearing aid receiver transducer, by connecting each of the acoustic chambers on the two sides of the receiver diaphragm, in the receiver housing, directly through an outlet port and a sound transmission |
