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    Communication device with echo suppression
    3.
    发明授权
    Communication device with echo suppression 有权

    公开(公告)号：US09819805B2

    公开(公告)日：2017-11-14

    申请号：US14323577

    申请日：2014-07-03

    Applicant: Sennheiser Communications A/S

    Inventor： Svend Feldt ,  Adam Dyrby ,  Stig Petri

    IPC: H04M9/08 ,  H04B3/21

    CPC classification number: H04M9/082 ,  H04B3/21 ,  H04M9/087

    Abstract: The application relates to a communication device, e.g. a speakerphone, comprising a microphone signal path, MSP, and a loudspeaker signal path, SSP, the microphone signal path comprising a microphone unit, an MSP-filter, and a transmitter unit operationally connected to each other and configured to transmit a processed signal originating from an input sound picked up by the microphone, the loudspeaker signal path comprising a receiver unit, an SSP-filter, and a loudspeaker unit operationally connected to each other and configured to provide an acoustic sound signal originating from a signal received by the receiver unit. The communication device comprises a control unit for dynamically controlling the filtering characteristics of the MSP and SSP-filters based on one or more control input signals. This has the advantage of providing a simple and flexible scheme for decreasing echo in a communication device, while ensuring an acceptable sound quality in the transmitted signal.

    Loudspeaker system comprising equalization dependent on volume control
    4.
    发明授权
    Loudspeaker system comprising equalization dependent on volume control 有权

    公开(公告)号：US09706302B2

    公开(公告)日：2017-07-11

    申请号：US14173651

    申请日：2014-02-05

    Applicant: Sennheiser Communications A/S

    Inventor： Anders Røser Hansen ,  Poul Peder Hestbek

    IPC: H04R3/04 ,  H03G5/00 ,  H03G5/16 ,  H03G9/02

    CPC classification number: H04R3/04 ,  H03G5/005 ,  H03G5/165 ,  H03G9/025 ,  H04R2430/01

    Abstract: The application relates to a loudspeaker system including an input unit providing an electric input audio signal; an equalization unit for modifying said electric input audio signal in dependence on frequency and to provide an equalized electric audio signal according to a predefined equalization function, a loudspeaker unit for converting said equalized electric audio signal to an acoustic output sound signal, and a user interface for modifying a volume level of said output sound signal in a multitude (N) of steps V0, V1, . . . , VN. The application further relates to a method communication device comprising the loudspeaker system and to its use. The present application provides an improved loudspeaker system in which the equalization unit is configured to apply a specific equalization function EQ0, EQ1, . . . , EQN to the electric input audio signal in each of said multitude of steps V0, V1, . . . , VN of the volume level.

    MICROPHONE BOOM
    9.
    发明申请
    MICROPHONE BOOM 有权
    麦克风加热

    公开(公告)号：US20140161296A1

    公开(公告)日：2014-06-12

    申请号：US14103368

    申请日：2013-12-11

    Applicant: SENNHEISER COMMUNICATIONS A/S

    Inventor： Esge Brandt ANDERSEN ,  Claus BENJAMINSEN ,  Svend FELDT ,  Christian WANG ,  Torben CHRISTIANSEN ,  Brian BRORSBØL

    IPC: H04R1/02

    CPC classification number: H04R1/02 ,  H04R1/08 ,  H04R1/083 ,  H04R1/1041 ,  H04R1/406

    Abstract: A microphone boom is provided with extendable microphone arrays, and a headset having such a microphone boom. The headset comprise a casing accommodating the signal transmission circuitry and further comprises a speaker adapted to serve a sound signal at the proximity of a users ear and the speaker is protruding from the casing at a speaker-end of the casing and one microphone array is fixated relative to the casing distally with respect to the speaker-end.

    Abstract translation: 麦克风臂具有可伸缩的麦克风阵列，以及具有这种麦克风的头戴式耳机。 耳机包括容纳信号传输电路的壳体，并且还包括适于在用户耳朵附近服务声音信号的扬声器，并且扬声器在壳体的扬声器端处从壳体突出并且一个麦克风阵列被固定 相对于外壳相对于扬声器端向远侧。

    ADAPTIVE FILTER UNIT FOR BEING USED AS AN ECHO CANCELLER
    10.
    发明申请
    ADAPTIVE FILTER UNIT FOR BEING USED AS AN ECHO CANCELLER 审中-公开

    公开(公告)号：US20190222699A1

    公开(公告)日：2019-07-18

    申请号：US16362156

    申请日：2019-03-22

    Applicant: Sennheiser Communications A/S

    Inventor： Stig PETRI ,  Svend FELDT

    IPC: H04M9/08 ,  G10L21/0232 ,  H04R3/02 ,  G10L21/0208 ,  G06F17/14 ,  H04B3/23 ,  H03H21/00

    CPC classification number: H04M9/082 ,  G06F17/142 ,  G10L21/0208 ,  G10L21/0232 ,  G10L2021/02082 ,  H03H21/0027 ,  H04B3/23 ,  H04R1/1091 ,  H04R3/02 ,  H04R25/453

    Abstract: The invention relates to an adaptive filter unit, in particular for being used as an echo canceller, comprising a first filter input, configured to receive a first electric audio signal, indicative of a first audio signal A(t), a second filter input, configured to receive a second electric audio signal, indicative of a second audio signal B(t), a processor and a filter output. The processor is configured to calculate and provide audio estimation data X(fn, A(t1, . . . , tM(fn))) in the frequency domain; to calculate a transformed second audio signal Y(fn, B(t)), formed by a transformation of the second audio signal B(t) into the frequency domain; and to calculate a filtered audio signal by subtracting delayed audio estimation data from the transformed second audio signal, wherein the delayed audio estimation data is provided by a memory unit of the adaptive filter unit, which is arranged to provide a data exchange with the processor, and wherein the delayed audio estimation data comprises a frequency dependent time delay compared to the transformed second audio signal.

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