PROCESADO DE SEÑALES DE AUDIO.
    121.
    发明专利

    公开(公告)号:ES2235937T3

    公开(公告)日:2005-07-16

    申请号:ES00960006

    申请日:2000-09-08

    Inventor: WOODS WILLIAM S

    Abstract: Un procedimiento para procesar señales de audio que comprende: el procesado de una señal (102) de audio de entrada con una o más componentes de realimentación asociados a un camino (130) de realimentación acústica para proporcionar una señal procesada h(t); y inhibición de al menos una componente de realimentación; caracterizado por: la detección de al menos una componente de realimentación en la señal de audio de entrada y la emisión de una señal (318) parámetro indicador de la realimentación; la generación de una señal de sonda de banda estrecha para sondear el camino de realimentación acústica con una señal de sonda acústica subaudible de banda estrecha de alta relación señal a ruido; estando generada la señal de sonda de banda estrecha por un generador de sonda (110) receptivo a la señal procesada h(t) y a la señal de parámetro indicador de la realimentación; y la inhibición de al menos una componente de realimentación mediante el ajuste de un filtro (134) inhibidor de la realimentaciónusando la señal de sonda de banda estrecha.

    LOW POWER AMPLITUDE MODULATION DETECTOR

    公开(公告)号:CA2547714A1

    公开(公告)日:2005-06-23

    申请号:CA2547714

    申请日:2004-12-01

    Inventor: TERRY JOHN DAVID

    Abstract: An AM demodulator using totem pole complementary metal oxide semiconductor transistors having a feedback to provide a common gate voltage of approximately half that across the transistors in the totem pole. The AM demodulator used in a hearing assistance device and in a programmer of a hearing assistance device.

    TRANSMIT-RECEIVE SWITCHING IN WIRELESS HEARING AIDS

    公开(公告)号:CA2547414A1

    公开(公告)日:2005-06-16

    申请号:CA2547414

    申请日:2004-11-24

    Abstract: Systems, devices and methods are provided to switch between transmit and receive modes in wireless hearing aids. One aspect relates to an apparatus f or use within a communication system that has an inductive coil connected to a tuning capacitor at a node. An amplifier is connected to the node through a DC blocking capacitor to receive an induced signal in the inductive coil in a receive mode. A driver energizes the inductive coil with a driven signal in a transmit mode. According to various embodiments, the apparatus transforms th e inductive coil, the tuning capacitor and the DC blocking capacitor into an equivalent series resonant circuit to reduce an inductive load in the transm it mode, and transforms the inductive coil, the tuning capacitor and the DC blocking capacitor into an equivalent parallel resonant circuit to increase an inductive load in the receive mode.

    124.
    发明专利
    未知

    公开(公告)号:AT289152T

    公开(公告)日:2005-02-15

    申请号:AT00960006

    申请日:2000-09-08

    Inventor: WOODS WILLIAM S

    Abstract: Systems, devices, and methods are provided to inhibit at least one feedback component of an input audio signal by adjusting a feedback-inhibiting filter through a narrowband subaudible signal. The level of the signal may be determined using an audibility model so as to yield its subaudible quality.

    126.
    发明专利
    未知

    公开(公告)号:AT225553T

    公开(公告)日:2002-10-15

    申请号:AT99957536

    申请日:1999-11-10

    Inventor: WOODS WILLIAM S

    Abstract: A system for measuring speech content in sound. The system determining time local speech-to-noise ratio for one or more bands. The system using a signal related to the power of the input signal or envelope and generating a time-dependent mean of the envelope and deviation of the envelope from the mean to estimate a time-dependent speech-to-noise ratio. The system providing single band or multiband speech-to-noise estimates for signal processing applications. The system realizable in analog, digital or analog and digital combinations.

    HEARING AID SYSTEMS
    128.
    发明专利

    公开(公告)号:CA2396771A1

    公开(公告)日:2001-07-26

    申请号:CA2396771

    申请日:2001-01-18

    Abstract: Systems, structures, and methods are provided to fit, program, or upgrade a hearing aid system to a patient. One embodiment includes the use of a mobile device to interact with the hearing aid system through a short-range network . The mobile device is also adapted to communicate with a server through a lon g- range wireless network. The server may reside on the Internet.

    Audio signal processing
    129.
    发明专利

    公开(公告)号:AU7123100A

    公开(公告)日:2001-04-10

    申请号:AU7123100

    申请日:2000-09-08

    Inventor: WOODS WILLIAM S

    Abstract: Systems, devices, and methods are provided to inhibit at least one feedback component of an input audio signal by adjusting a feedback-inhibiting filter through a narrowband subaudible signal. The level of the signal may be determined using an audibility model so as to yield its subaudible quality.

    SYSTEM FOR MEASURING SIGNAL TO NOISE RATIO IN A SPEECH SIGNAL

    公开(公告)号:CA2351195A1

    公开(公告)日:2000-05-18

    申请号:CA2351195

    申请日:1999-11-10

    Inventor: WOODS WILLIAM S

    Abstract: A system for measuring speech content in sound. The system determining time local speech-to noise ratio for one or more bands. The system using a signal related to the power of the input signal or envelope and generating a time- dependent mean of the envelope and deviation of the envelope from the mean t o estimate a time-dependent speech-to-noise ratio. The system providing single band or multiband speech-to-noise estimates for signal processing applications. The system realizable in analog, digital or analog and digital combinations.

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