1
Eberhard Zwicker, Thomas Beckenbauer: Hearing aid with locating microphones. Siemens Aktiengesellschaft, Hill Van Santen Steadman & Simpson, September 20, 1988: US04773095 (97 worldwide citation)

A hearing aid which can be built into a frame, such as eyeglasses, to be worn by a hearing-impaired person has a first microphone arrangement having a directional reception pattern, and a second microphone arrangement for sound locating. The second microphone arrangement includes a first locating mi ...


2
Manfred Zollner, Christian Hoffmann, Eberhard Zwicker: Method for the electrical stimulation of the auditory nerve and multichannel hearing prosthesis for carrying out the method. Siemens Aktiengesellschaft, Hill Van Santen Steadman & Simpson, January 31, 1984: US04428377 (84 worldwide citation)

In the exemplary embodiments, the sound signals are converted into electrical signals, which are wirelessly transmitted to an implanted receiver, and from the latter, electric stimuli in electrode channels are brought to act on the auditory nerve. The transmission proceeds in the time division multi ...


3
Eberhard Zwicker, Thomas Beckenbauer, Guenther Beer: Directional microphone arrangement. Siemens Aktiengesellschaft, Hill Van Santen Steadman & Simpson, December 8, 1987: US04712244 (74 worldwide citation)

A directional microphone arrangement has a number of discrete microphones each having an electrical output and elements for deriving first and second electrical signals which are 180.degree. out of phase with respect to each other from the outputs of the microphones. A third signal is also derived t ...


4
Eberhard Zwicker, Klaus Deuter: Method and system of background noise suppression in an audio circuit particularly for car radios. Blaupunkt Werke, Frishauf Holtz Goodman & Woodward, September 19, 1989: US04868881 (38 worldwide citation)

To improve the fidelity of reproduction of automobile radios during conditions of extraneous in the passenger compartment, noise signals are derived, for example from a microphone installed in the engine compartment of the vehicle. The audio program signals are conducted through a multichannel equal ...


5
Christian Hoffmann, Manfred Zollner, Eberhard Zwicker: Method and apparatus for generating electrocutaneous stimulation patterns for the transmission of acoustic information. Siemens Aktiengesellschaft, Hill Van Santen Steadman Chiara & Simpson, June 28, 1983: US04390756 (35 worldwide citation)

In an exemplary embodiment, the point of departure is that of a substitute signal system for deaf individuals which codes acoustical signals, in particular speech sound, into electrocutaneous stimulation patterns. Current pulse patterns serve as substitute signals which, via skin surface electrodes, ...


6
Manfred Zollner, Christian Hoffmann, Eberhard Zwicker: Method for generating acoustical speech signals which can be understood by persons extremely hard of hearing and a device for the implementation of said method. Siemens Aktiengesellschaft, Hill Van Santen Steadman & Simpson, September 6, 1983: US04403118 (24 worldwide citation)

In the illustrated embodiments, the signals to be transmitted are converted into electrical signals and are divided by means of filters into a plurality of frequency bands. The envelopes of the signals coming out of the filters are then employed for the modulation of tones. Finally, the original ton ...


7
Manfred Zollner, Christian Hoffmann, Eberhard Zwicker: Method for generating acoustical voice signals for persons extremely hard of hearing and a device for implementing this method. Siemens Aktiengesellschaft, Hill Van Santen Steadman Chiara & Simpson, September 15, 1981: US04289935 (23 worldwide citation)

In an exemplary embodiment, the signals to be transmitted are converted into electric signals and resolved into a multiplicity of frequency bands by means of filters. The signals coming from the filters are then employed for the modulation of tone signals. Finally, original tones are supplied to the ...


8
Eberhard Zwicker, Thomas Beckenbauer, Guenther Beer: Hearing aid with adjustable frequency response. Siemens Aktiengesellschaft, Hill Van Santen Steadman & Simpson, September 3, 1991: US05046102 (22 worldwide citation)

A hearing aid has a sound-receiving microphone from which an incoming signal is supplied to a number of different channels, each channel being allocated to a different frequency range within a total expected range of frequencies for the incoming signal. Each channel includes a circuit for measuring ...


9
Eberhard Zwicker: Electro-acoustical measuring device and method. Siemens Aktiengesellschaft, Hill Van Santen Steadman Chiara & Simpson, June 28, 1983: US04390748 (14 worldwide citation)

In an exemplary embodiment, for testing the chronological resolution of hearing, acoustic signals are supplied to the ear to be tested via an earpiece and consist of a test tone which can be interrupted and of a masking sound which can be modulated, their frequency and amplitude level being adjustab ...


10
Eberhard Zwicker, Wolfgang Daxer: Method for operating a speech recognition device. Siemens Aktiengesellschaft, Hill Van Santen Steadman & Simpson, December 27, 1983: US04423291 (6 worldwide citation)

Speech recognition is improved by time-standardization of reference and unknown words of constant bit-length formed by suppressing bits or generating copy bits.