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| Number | Title | Issue Date |
| 5289543 | FM receiver and communication systems including same An FM receiver includes an FM discriminator having a comparator for converting the FM signal to a series of discrete square-wave pulses all of the same amplitude and of a repetition rate varying with the frequency of the FM signals; and an integrator circ... | 02/22/1994 |
| 5285499 | Ultrasonic frequency expansion processor A method and apparatus for ultrasonic frequency expansion is characterized by expanding audiometric frequencies before translation into the ultrasonic range. The audiometric signals are first expanded in time by a factor of 1/ଲ where ଲ | 02/08/1994 |
| 5259032 | contact transducer assembly for hearing devices A contact transducer assembly for an electromagnetically driven hearing device such as a hearing aid or other audio signal reproducing device worn by a user is described. The contact transducer assembly includes a transducer which is attached to a biocomp... | 11/02/1993 |
| 5202927 | Remote-controllable, programmable, hearing aid system A remote-controllable, programmable hearing aid system, including of a hearing aid (2) with incorporated amplifier and with a signal processing circuit whose transmission characteristic can be determined at any time by a set of control parameters, and an ... | 04/13/1993 |
| 5165017 | Automatic gain control circuit in a feed forward configuration An input signal representing speech is preamplified, filtered, and fed foward in parallel to Automatic Gain Control (AGC) circuitry and to a gain controllable amplifier. The AGC detects the peak absolute value of the input signal, charing a capacitor in a... | 11/17/1992 |
| 5159639 | Assistive listening device An assistive listening device detachably securable to a temple frame of eyeglasses. A carrier engages the frame and has one or more clips to which the instrument housing attaches. The housing contains a speaker, microphone and amplifier circuitry. The pow... | 10/27/1992 |
| 5144675 | Variable recovery time circuit for use with wide dynamic range automatic gain control for hearing aid A gain control voltage is applied to a control terminal of a variable gain hearing aid amplifier which is logarithmically related to a signal voltage level which is sensed at either an input terminal or an output terminal of the amplifier and which is bel... | 09/01/1992 |
| 5033999 | Method and apparatus for endodontically augmenting hearing An audiodontic device includes a transducer implanted in a dental post hole drilled into a root canal of a tooth, preferably a maxillary molar. The transducer imparts vibratory signals to the tooth in response to applied audio signals. A precision attachm... | 07/23/1991 |
| 4941179 | Method for the regulation of a hearing aid, a hearing aid and the use thereof A hearing aid for relieving high frequency hearing loss, includes a volume control that allows the user to gradually adjust and increase the degree of compensation at a pace which corresponds to their particular need. The volume control changes the slope ... | 07/10/1990 |
| 4918757 | Hearing aid headband support In a hearing aid support, an elongated adjustable headband surrounds the head from the forehead hairline in the vicinity of the ears to the nape of the neck. Strip forming slits in the headband at the predetermined position of the skull bone support a bon... | 04/24/1990 |
| 4918737 | Hearing aid with wireless remote control A hearing aid has a housing which can be worn at the head, such as in or behind the ear, and which contains the basic electrical and acoustic elements of the hearing aid. The housing has a portion adapted for introduction into the auditory canal, and a co... | 04/17/1990 |
| 4901353 | Auditory prosthesis fitting using vectors Hearing improvement device, auditory prosthesis, hearing aid, fitting device for these apparatus and method of fitting or determining new auditory characteristic by selecting and applying a vector consisting of relative changes to a plurality of individua... | 02/13/1990 |
| 4845755 | Remote control hearing aid A hearing aid with wireless remote control of at least one of its controllable functions. The microphone of the hearing aird is used as a receiving element for the control signals. Energy (such as ultrasound) which the hearing aid microphone can transform... | 07/04/1989 |
| 4840178 | Magnet for installation in the middle ear A magnet assembly for location around portions of bones in the middle ear where one portion of the assembly is a magnet and another portion of the assembly is a magnetic material, the portions being hinged to one another so that they are held around the b... | 06/20/1989 |
| 4821323 | Stereo headphone A stereo headphone has a generally "U"-shaped head band provided with a pair of head band support rails at opposite ends thereof. End portions of the head band are received for sliding extension and retraction withing the support rails. A speaker support ... | 04/11/1989 |
| 4817607 | Magnetic ossicular replacement prosthesis An ossicular replacement prosthesis containing a magnet in the head of the prosthesis so that when used with a magnetic induction hearing aid having a coil producing a magnetic field, the hearing losses resulting from insertion of the prosthesis and any o... | 04/04/1989 |
| 4783815 | Manufacturing miniature hearing aid having a multi-layer circuit arrangement As opposed to standard circuit board fabrication techniques, whereby plated holes are commonly bored through all the layers of a multilayer board, the circuit board for a hearing aid according to the invention is fabricated by alternatingly forming plated... | 11/08/1988 |
| 4777474 | Alarm system for the hearing impaired The present invention is an alarm for the hearing impaired. A base station includes alarm receiving circuits for receipt of alarm signals. These alarm signals could be a telephone ringing signal, a smoke/fire alarm, a doorbell signal or the like. Upon det... | 10/11/1988 |
| 4756312 | Magnetic attachment device for insertion and removal of hearing aid A direct contact hearing aid apparatus adapted to be mounted deep within the ear canal is disclosed, including an output electromechanical transducer for converting audio output signals into mechanical movement of an output coupling element without the pr... | 07/12/1988 |
| 4742887 | Open-air type earphone An earphone has a housing divided by a driver unit into front and back cavities with a sound generation opening at the front thereof, a duct extending from the back cavity of the housing and having a length substantially larger than its diameter, and a ca... | 05/10/1988 |
| 4723293 | Hearing aid apparatus A hearing aid apparatus has a housing containing components such as a microphone, an amplifier and an earphone,and to which a terminal having contacts for connection to a signal line is applied. The terminal also has contacts for derivation of signals fro... | 02/02/1988 |
| 4689819 | Class D hearing aid amplifier A sub-miniature power amplifier for hearing aids configured to be completely self-contained and to fit within the user's ear features a Class D amplifier stage providing a peak-to-peak output voltage greater than the power supply voltage. By configuring a... | 08/25/1987 |
| 4674123 | Test bench for the adjustment of electro-acoustic channels and particularly of devices for auditory correction Test bench for the adjustment of electro-acoustic channels and particularly auditory corrective apparatus. The present invention has for its object a test bench for the adjustment of electro-acoustic channels and particularly auditory corrective apparatus ... | 06/16/1987 |
| 4622440 | Differential hearing aid with programmable frequency response A differential input hearing aid with a programmable frequency response provides the hard of hearing with the capability to listen to individual conversations in the midst of high ambient background noise, and to have the frequency response of the hearing... | 11/11/1986 |
| 4617536 | Amplitude modulation apparatus and method An apparatus and a method modulate a carrier signal so that the resultant modulated signal varies between a value substantially equal to the quiescent level of the carrier signal and peak values up to several hundred percent of the quiescent level of the ... | 10/14/1986 |
| 4593696 | Auditory stimulation using CW and pulsed signals An improvement in noise susceptibility is realized in auditory stimulation of the deaf by electrical signals. At least one analog electrical signal is applied to implanted electrodes in a patient, and at least one pulsatile signal is applied to implanted ... | 06/10/1986 |
| 4592087 | Class D hearing aid amplifier A subminiature power amplifier for hearing aids configured to be completely self-contained and fit within the user's ear features a Class D amplifier stage. By configuring all signal elements as digital units, circuit balance is readily maintained. A subs... | 05/27/1986 |
| 4581491 | Wearable tactile sensory aid providing information on voice pitch and intonation patterns A wearable tactile sensory aid which presents a vibratory signal representative of voice pitch and intonation patterns to the skin. The vibratory signal consists of a constant amplitude square wave having a frequency equal to, or some fraction of, the fun... | 04/08/1986 |
| 4539439 | Plugs, receptacles and hearing aids A connecting cord has a plug at each end. Either such plug may be plugged into the receptacle of a hearing aid and the other plug may be plugged into an external microphone. The contacts of each plug are connected in a different circuit configuration to t... | 09/03/1985 |
| 4509022 | Amplifier circuit with automatic gain control and hearing aid equipped with such a circuit An amplifier system comprising an input transducer, an amplifier and an output transducer connected in cascade, and an automatic gain control circuit comprising a variable resistor for taking off a voltage which varies with the signal from the input trans... | 04/02/1985 |
| 4509193 | Miniature acoustical transducer with filter/regulator power supply circuit A battery-powered miniature acoustical transducer system for a hearing aid, including a microphone and an amplifier, has a combination filter and voltage regulator incorporated in its power supply circuit; the filter/regulator includes a field-effect tran... | 04/02/1985 |
| 4498555 | Hearing aid nubbin and acoustic damper An improved nubbin and acoustic damper for the elimination or production of resonance in the sound transmission tubing of a hearing aid. The nubbin and nubbin sound conduit include a right angle corner. The damper comprises a plug having three body portio... | 02/12/1985 |
| 4495384 | Real time cochlear implant processor A real time cochlear implant processor (10) receives an audio input signal and extracts spectrum segments by operation of bandpass filters (18, 20). In each channel temporal circuitry detects the zero slope points of the filtered audio input signal and ge... | 01/22/1985 |
| 4490585 | Hearing aid A hearing aid is made up of an automatic filter circuit for transmitting an input signal in a predetermined characteristic, and a low frequency component detecting circuit for detecting the low frequency component of the input signal, to change the charac... | 12/25/1984 |
| 4471171 | Digital hearing aid and method To match the operation of a digital hearing aid directly to user requirements, and to reprogram the hearing aid as the hearing aid and/or user response characteristics change, a digital data processing element (12) processing digitized audio signals is co... | 09/11/1984 |
| 4467145 | Hearing aid In an exemplary embodiment, switches are provided for controlling operating state, and the like, of a miniature hearing aid. In such hearing aids, it is a precondition that all components, thus the switches as well, be designed very small and function rel... | 08/21/1984 |
| 4440982 | Hearing aid A hearing aid includes a duct (10) for transmitting the sound from the receiver (2) to the exterior of the housing (1) of the hearing aid. The duct is formed in a component (9) which is constituted by a body of an elastic damping material and which also s... | 04/03/1984 |
| 4441202 | Speech processor A system for converting a speech signal into a data signal for controlling an implantable stimulation electrode array hearing prosthesis. An input speech signal is passed through three circuit arms, comprising filter circuits, zero crossing counter circui... | 04/03/1984 |
| 4381830 | Continuous flow earmold tubing connector A connector connects sound conduction tubing from a hearing aid to a sound conduction bore in an earmold. The connector is an elbow-shaped member with one end receiving an end of the sound conduction tubing while the other end has latching means that latc... | 05/03/1983 |
| 4380689 | Electroacoustic transducer for hearing aids An electroacoustic transducer is disclosed which is small in size so as to allow its use in hearing aids or like structure, but which maintains the performance characteristics of larger transducers. The transducer minimizes its cross-sectional dimensions ... | 04/19/1983 |
