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    Dynamically configurable ANR filter block topology
    21.
    发明授权
    Dynamically configurable ANR filter block topology 有权
    动态配置ANR滤波器块拓扑

    公开(公告)号：US09589557B2

    公开(公告)日：2017-03-07

    申请号：US14807040

    申请日：2015-07-23

    申请人： Bose Corporation

    发明人： Ricardo F. Carreras ,  Marcel Joho

    IPC分类号： G10K11/16 ,  G10L21/0208 ,  G10K11/00

    CPC分类号： G10K11/16 ,  G10K11/002 ,  G10L21/0208

    摘要： An active noise reduction (ANR) circuit includes a digital feed-forward ANR pathway coupled to a feed-forward microphone, to detect environmental sounds in an environment external to a casing, and to a first acoustic driver to output sounds within the casing. The digital feed-forward ANR pathway applies a plurality of filters using a first set of coefficients to convert signals from the feed-forward microphone to feed-forward anti-noise sounds to reduce environmental sounds within the casing. In response to a stimulus, the digital feed-forward ANR pathway applies the plurality of filters using a second set of coefficients, which reduce the degree of feed-forward ANR to enable human speech sounds in the environment external to the casing to be conveyed from the feed-forward microphone to the acoustic driver with less reduction than provided by the first plurality of filters.

    摘要翻译： 有源降噪（ANR）电路包括耦合到前馈麦克风的数字前馈ANR路径，以检测外壳环境中的环境声音，以及第一声学驱动器，以在壳体内输出声音。 数字前馈ANR路径使用第一组系数应用多个滤波器以将来自前馈麦克风的信号转换为前馈抗噪声声音，以减少壳体内的环境声音。 响应于刺激，数字前馈ANR路径使用第二组系数应用多个滤波器，这降低了前馈ANR的程度，以使壳体外部的环境中的人类语音能够从 所述前馈麦克风到所述声学驱动器具有比由所述第一多个滤波器提供的减小更少的衰减。

    Method for suppressing the late reverberation of an audio signal
    24.
    发明授权
    Method for suppressing the late reverberation of an audio signal 有权
    用于抑制音频信号的后期混响的方法

    公开(公告)号：US09520137B2

    公开(公告)日：2016-12-13

    申请号：US14907216

    申请日：2014-07-21

    申请人： ARKAMYS

    发明人： Nicolas Lopez ,  Gaël Richard ,  Yves Grenier

    IPC分类号： H04B3/20 ,  H04R29/00 ,  H03G3/00 ,  H04B15/00 ,  G10L19/06 ,  G10L21/02 ,  G10K11/00 ,  G10L19/02 ,  G10L21/0208

    CPC分类号： G10L19/06 ,  G10K11/002 ,  G10L19/0212 ,  G10L21/02 ,  G10L2021/02082

    摘要： A method for suppressing the late reverberation of an audio signal. A plurality of prediction vectors are calculated. A plurality of observation vectors from the modulus of the complex time-frequency transform of an input signal is generated. A plurality of synthesis dictionaries from the plurality of observation vectors are constructed. A late reverberation spectrum from the plurality of synthesis dictionaries and the plurality of prediction vectors are estimated. A plurality of observation vectors are filtered to eliminate the late reverberation spectrum and obtain a dereverberated signal modulus.

    摘要翻译： 一种用于抑制音频信号的后期混响的方法。 计算多个预测矢量。 产生来自输入信号的复数时频变换的模数的多个观测向量。 从多个观察向量构成多个合成词典。 估计来自多个合成字典和多个预测向量的后期混响频谱。 对多个观察矢量进行滤波以消除后期混响频谱，并获得反混响信号模数。

    PRIVACY-PRESERVING ENERGY-EFFICIENT SPEAKERS FOR PERSONAL SOUND
    25.
    发明申请
    PRIVACY-PRESERVING ENERGY-EFFICIENT SPEAKERS FOR PERSONAL SOUND 审中-公开
    保护个人声音的能量效能扬声器

    公开(公告)号：US20160336022A1

    公开(公告)日：2016-11-17

    申请号：US14709453

    申请日：2015-05-11

    申请人： Microsoft Technology Licensing, LLC

    发明人： Dinei Florencio ,  Zhengyou Zhang

    IPC分类号： G10L21/0272 ,  H04R3/12 ,  G10K11/00

    CPC分类号： G10L21/0272 ,  G10K11/002 ,  H04R3/12 ,  H04R27/00 ,  H04R2217/03 ,  H04S2420/01

    摘要： The privacy-preserving energy-efficient speaker implementations described herein improve user privacy while a user is listening to audio and can reduce the energy necessary to output the audio. This can be done by using parametric speakers and/or traditional loud-speakers. Signal splitting and masking can be used to improve user privacy. Additionally, a signal modulation technique which significantly reduces power requirements to output an audio signal, especially in the context of using parametric speakers, can also be employed.

    摘要翻译： 本文所述的保护隐私的节能扬声器实现在用户正在收听音频的同时改善用户隐私，并且可以减少输出音频所需的能量。 这可以通过使用参数扬声器和/或传统扬声器来完成。 信号分割和掩蔽可用于提高用户隐私。 此外，特别是在使用参数扬声器的上下文中，可以采用显着降低输出音频信号的功率需求的信号调制技术。

    IMPEDANCE MATCHING LAYER FOR ULTRASONIC TRANSDUCERS WITH METALLIC PROTECTION STRUCTURE
    26.
    发明申请
    IMPEDANCE MATCHING LAYER FOR ULTRASONIC TRANSDUCERS WITH METALLIC PROTECTION STRUCTURE 审中-公开
    具有金属保护结构的超声波传感器的阻抗匹配层

    公开(公告)号：US20160332198A1

    公开(公告)日：2016-11-17

    申请号：US15152226

    申请日：2016-05-11

    申请人： Measurement Specialties, Inc.

    发明人： Minoru Toda

    IPC分类号： B06B1/06 ,  B06B3/00 ,  H01L41/22 ,  H01L41/08

    CPC分类号： H01L41/22 ,  B06B1/067 ,  G10K9/122 ,  G10K11/002

    摘要： An ultrasonic transducer comprising a piezoelectric element, an acoustic matching layer arranged on a surface of the piezoelectric element and having a thickness of at least one-quarter of a wavelength of a center resonant frequency of the transducer, and a front metal layer arranged on a surface of the acoustic matching layer opposite that of the piezoelectric element and having a thickness equal to one-half of the wavelength of the center resonant frequency.

    摘要翻译： 一种超声换能器，包括压电元件，声匹配层，其布置在所述压电元件的表面上，并且具有厚度为所述换能器的中心谐振频率的至少四分之一波长的厚度，以及布置在所述压电元件上的前金属层 声匹配层的表面与压电元件的表面相反，并且具有等于中心谐振频率的波长的一半的厚度。