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    Audio processing device and a method for estimating a signal-to-noise-ratio of a sound signal
    1.
    发明授权
    Audio processing device and a method for estimating a signal-to-noise-ratio of a sound signal 有权

    公开(公告)号：US10433076B2

    公开(公告)日：2019-10-01

    申请号：US16291899

    申请日：2019-03-04

    Applicant: Oticon A/S

    Inventor： Jesper Jensen ,  Andreas Thelander Bertelsen ,  Michael Syskind Pedersen

    IPC: G10L15/20 ,  H04R25/00

    Abstract: An audio processing device comprises a) at least one input unit for providing a time-frequency representation Y(k,n) of an electric input signal representing sound consisting of target speech and noise signal components, where k and n are frequency band and time frame indices, respectively, b) a noise reduction system configured to: determine a first signal to noise ratio estimate γ(k,n) of said electric input signal, and determine a second signal to noise signal ratio estimate ζ(k,n) of said electric input signal from said first signal to noise ratio estimate γ(k,n) based on a recursive algorithm providing non-linear smoothing, and wherein parameters of said smoothing are determined in dependence of the first and/or the second signal to noise ratio estimates corresponding to a multitude of frequency band indices. The invention may be used in hearing aids, headsets, ear phones, active ear protection systems, handsfree telephone systems, mobile telephones, etc.

    Hearing aid comprising a directional microphone system
    5.
    发明授权
    Hearing aid comprising a directional microphone system 有权

    公开(公告)号：US10327078B2

    公开(公告)日：2019-06-18

    申请号：US15482006

    申请日：2017-04-07

    Applicant: Oticon A/S

    Inventor： Michael Syskind Pedersen ,  Andreas Thelander Bertelsen

    IPC: H04R25/00

    Abstract: A hearing aid comprises a BTE-part adapted for being located behind an ear (ear) of a user, and comprising a) a multitude M of microphones, which—when located behind the ear of the user—are characterized by respective transfer functions, HBTEi(θ, φ, r, k), representative of propagation of sound from sound sources S to the respective microphones b) a memory unit comprising complex, frequency dependent constants Wi(k)′, i=1, . . . , M, c) a beamformer filtering unit for providing a beamformed signal Y as a weighted combination of the microphone signals using said complex, frequency dependent constants The frequency dependent constants are determined to provide a resulting transfer function Hpinna(θ,φ,r,k)=Σi=1MWi(k)·HBTEi(θ,φ,r,k), so that a difference between the resulting transfer function Hpinna(θ, φ, r, k) and a transfer function HITE(θ, φ, r, k) of a microphone located close to or in the ear canal fulfills a predefined criterion.

    Binaural hearing aid system and a hearing aid comprising own voice estimation
    6.
    发明授权
    Binaural hearing aid system and a hearing aid comprising own voice estimation 有权

    公开(公告)号：US12137324B2

    公开(公告)日：2024-11-05

    申请号：US18379411

    申请日：2023-10-12

    Applicant: Oticon A/S

    Inventor： Michael Syskind Pedersen ,  Jan M. De Haan ,  Justyna Walaszek ,  Anders Vinther Olsen ,  Karsten Bonke ,  Matias Tofteby Bach ,  Sigurdur Sigurdsson ,  Mojtaba Farmani ,  Andreas Thelander Bertelsen ,  Angela Josupeit ,  Claus Forup Corlin Jespersgaard ,  Gusztáv Lõcsei

    IPC: H04R25/00

    Abstract: A binaural hearing aid system includes first and second hearing aids configured to be worn by a user at or in respective first and second ears of the user, each of the first and second hearing aids including: at least one input transducer configured to pick up a sound at the at least one input transducer and to convert the sound to at least one electric input signal representative of the sound, the sound at the at least one input transducer including a mixture of a target signal and noise; a controller for evaluating the sound at the at least one input transducer and providing a control signal indicative of a property of the sound; a transceiver configured to establish a communication link between the first and second hearing aids allowing the exchange of the control signal between the first and second hearing aids; a transmitter for establishing an audio link for transmitting the at least one electric input signal, or a processed version thereof, to another device. The controller is configured to: transmit the locally provided control signal to, and receive a corresponding remotely provided control signal from the opposite hearing aid via the communication link, and to compare the locally provided and the remotely provided control signals and to provide a comparison control signal in dependence thereof, and to transmit the at least one electric input signal, or a processed version thereof, to the another device via the audio link in dependence of the comparison control signal.

    Audio processing device and a method for estimating a signal-to-noise-ratio of a sound signal
    7.
    发明授权
    Audio processing device and a method for estimating a signal-to-noise-ratio of a sound signal 有权

    公开(公告)号：US11483663B2

    公开(公告)日：2022-10-25

    申请号：US17090448

    申请日：2020-11-05

    Applicant: Oticon A/S

    Inventor： Jesper Jensen ,  Andreas Thelander Bertelsen ,  Michael Syskind Pedersen

    IPC: H04R25/00

    Abstract: A hearing aid includes a) at least one input unit for providing a time-frequency representation Y(k,n) of an electric input signal representing sound consisting of target speech and noise signal components, where k and n are frequency band and time frame indices, respectively, b) a noise reduction system configured to b1) determine an a posteriori signal to noise ratio estimate γ(k,n) of the electric input signal, and to b2) determine an a priori signal to noise signal ratio estimate ζ(k,n) of the electric input signal from the a posteriori signal to noise ratio estimate γ(k,n) based on a recursive algorithm providing non-linear smoothing. The a posteriori signal to noise ratio estimate of said electric input signal is provided as a mixture of first and second different a posteriori signal to noise ratio estimates. The invention may be used in audio processing devices, such as hearing aids, headsets, etc.

    Portable device comprising a directional system
    8.
    发明授权
    Portable device comprising a directional system 有权

    公开(公告)号：US11330366B2

    公开(公告)日：2022-05-10

    申请号：US16855232

    申请日：2020-04-22

    Applicant: Oticon A/S

    Inventor： Michael Syskind Pedersen ,  Carsten Scheel ,  Martin Bergmann ,  Henrik Bay ,  Morten Pedersen ,  Bent Krogsgaard ,  Jacob Mikkelsen ,  Stefan Gram ,  Jan M. De Haan ,  Andreas Thelander Bertelsen

    IPC: H04R25/00 ,  H04R1/40

    Abstract: A sound capture device configured to be worn by a person and/or to be located on a surface is configured to pick up target sound from a target sound source s. The sound capture device comprises a) an input unit providing a multitude of electric input signals, each comprising a target signal component and a noise signal component; b) a directional noise reduction system comprising a beamformer unit coupled to said multitude of input signals and configured to provide an estimate of the target sound s. The beamformer unit comprises b1) target maintaining, reference beamformer providing a current reference signal; and b2) a target cancelling beamformer providing a current target cancelling sign. The directional noise reduction system is configured to operate in at least two modes in dependence of a mode control signal, 1) in a directional mode and 2) in a non-directional, omni-directional mode. The sound capture device further comprises c) antenna and transceiver circuitry for establishing an audio link to another device, and to transmit said estimate of the target sound s to said another device, and d) a mode controller for determining said mode control signal in dependence of said current reference signal and said current target cancelling signal. A method of operating a sound capture device is further disclosed.

    Hearing device comprising a noise reduction system
    9.
    发明授权
    Hearing device comprising a noise reduction system 有权

    公开(公告)号：US11245993B2

    公开(公告)日：2022-02-08

    申请号：US16785167

    申请日：2020-02-07

    Applicant: Oticon A/S

    Inventor： Asger Heidemann Andersen ,  Jesper Jensen ,  Michael Syskind Pedersen ,  Nels Hede Rohde ,  Anders Brødløs Olsen ,  Michael Smed Kristensen ,  Thomas Bentsen ,  Andreas Thelander Bertelsen

    IPC: G06N3/08 ,  G10L25/51 ,  H04R25/00

    Abstract: A hearing device, e.g. a hearing aid, is configured to be worn by a user at or in an ear or to be fully or partially implanted in the head at an ear of the user. The hearing device comprises a) an input unit for providing at least one electric input signal in a time frequency representation k, m, where k and m are frequency and time indices, respectively, and k represents a frequency channel, the at least one electric input signal being representative of sound and comprising target signal components and noise components; and b) a signal processor comprising b1) an SNR estimator for providing a target signal-to-noise ratio estimate for said at least one electric input signal in said time frequency representation; and b2) an SNR-to-gain converter for converting said target signal-to-noise ratio estimate to respective gain values in said time frequency representation. The signal processor comprises a neural network, wherein the weights of the neural network have been trained with a plurality of training signals. A method of operating a hearing aid is further disclosed. The invention may e.g. be used in audio devices, such as hearing aids, headsets, mobile telephones, etc., operating in noisy acoustic environments.

    HEARING AID COMPRISING A DIRECTIONAL MICROPHONE SYSTEM
    10.
    发明申请
    HEARING AID COMPRISING A DIRECTIONAL MICROPHONE SYSTEM 审中-公开

    公开(公告)号：US20190222942A1

    公开(公告)日：2019-07-18

    申请号：US16362056

    申请日：2019-03-22

    Applicant: Oticon A/S

    Inventor： Michael Syskind Pedersen ,  Andreas Thelander Bertelsen

    IPC: H04R25/00

    CPC classification number: H04R25/407 ,  H04R25/405 ,  H04R25/505 ,  H04R25/558 ,  H04R25/70 ,  H04R2225/021 ,  H04R2225/025 ,  H04R2225/43

    Abstract: A hearing aid comprises a BTE-part adapted for being located behind an ear (ear) of a user, and comprising a) a multitude M of microphones, which—when located behind the ear of the user—are characterized by respective transfer functions, HBTEi(θ, φ, r, k), representative of propagation of sound from sound sources S to the respective microphones b) a memory unit comprising complex, frequency dependent constants Wi(k)′, i−1, . . . , M, c) a beamformer filtering unit for providing a beamformed signal Y as a weighted combination of the microphone signals using said complex, frequency dependent constants The frequency dependent constants are determined to provide a resulting transfer function Hpinna(θ, φ, r, k)=Σi=1MWi(k)·HBTEi(θ, φ, r, k), so that a difference between the resulting transfer function Hpinna(θ, φ, r, k) and a transfer function HITE(θ, φ, r, k) of a microphone located close to or in the ear canal fulfils a predefined criterion.

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