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1. 发明申请

WO2017218399A1 SPATIAL ENCODING DIRECTIONAL MICROPHONE ARRAY 审中-公开
标题翻译：空间编码方向麦克风阵列
公开(公告)号：WO2017218399A1
公开(公告)日：2017-12-21
申请号：PCT/US2017/036988
申请日：2017-06-12
申请人： MH ACOUSTICS, LLC
发明人： ELKO, Gary, W. , GAENSLER, Tomas, F. , MEYER, Jens, M. , DIETHORN, Eric, J.
IPC分类号： H04R1/40
CPC分类号： H04R1/406 , H04R3/005 , H04R2201/405 , H04R2499/11
摘要： In certain embodiments, an article of manufacture, such as a cell phone, has a device body with a non-spheroidal shape, such as a parallelepiped, and microphones configured at different locations on the device body. A signal processing system processes the microphone signals to generate a plurality of different output beampatterns in at least two non-parallel directions, wherein, in generating at least one of the output beampatterns, the signal processing system takes into account effects of the device body on the incoming acoustic signal. Four or more microphones can be used to generate B format output beampatterns, such as three dipole beampatterns and an omnidirectional beampattern.
摘要翻译：在某些实施例中，诸如蜂窝电话的制造物品具有非球形形状的装置主体（诸如平行六面体）以及配置在装置主体上的不同位置处的麦克风。信号处理系统处理麦克风信号以在至少两个非平行方向上生成多个不同的输出波束图，其中，在生成至少一个输出波束图中，信号处理系统考虑到装置主体对输入的声音信号。可以使用四个或更多麦克风来生成B格式输出波束图，例如三个偶极波束图和全向波束图。

2. 发明申请

WO2011087770A2 SURFACE-MOUNTED MICROPHONE ARRAYS ON FLEXIBLE PRINTED CIRCUIT BOARDS 审中-公开
标题翻译：柔性印刷电路板上的表面安装麦克风阵列
公开(公告)号：WO2011087770A2
公开(公告)日：2011-07-21
申请号：PCT/US2010/061445
申请日：2010-12-21
申请人： MH ACOUSTICS, LLC , ELKO, Gary, W.
发明人： ELKO, Gary, W.
CPC分类号： H04R1/04 , H04R3/005 , H04R19/01 , H04R19/016 , H04R2201/003 , H04R2430/23
摘要： A microphone array, having a three-dimensional (3D) shape, has a plurality of microphone devices mounted onto (at least one) flexible printed circuit board (PCB), which is bent to achieve the 3D dimensional shape. Output signals from the microphone devices can be combined (e.g., by weighted or unweighted summation or differencing) to form sub-element output signals and/or element output signals, and ultimately a single array output signal for the microphone array. The PCB may be uniformly flexible or may have rigid sections interconnected by flexible portions. Possible 3D shapes include (without limitation) cylinders, spirals, serpentines, and polyhedrons, each formed from a single flexible PCB. Alternatively, the microphone array may be an assembly of multiple, interconnecting sub-arrays, each having two or more rigid portions separated by one or more flexible portions, where each sub-array has at least one cut-out portion for receiving a rigid portion of another sub-array.
摘要翻译：具有三维（3D）形状的麦克风阵列具有安装到（至少一个）柔性印刷电路板（PCB）上的多个麦克风装置，其被弯曲以实现3D尺寸形状。来自麦克风装置的输出信号可以被组合（例如，通过加权或非加权求和或差分）以形成子元件输出信号和/或元件输出信号，最终用于麦克风阵列的单个阵列输出信号。 PCB可以是均匀柔性的，或者可以具有通过柔性部分互连的刚性部分。可能的3D形状包括（但不限于）圆柱体，螺旋，蛇形和多面体，每个由单个柔性PCB形成。或者，麦克风阵列可以是多个互连子阵列的组件，每个子阵列具有由一个或多个柔性部分分开的两个或更多个刚性部分，其中每个子阵列具有至少一个切口部分，用于接收刚性部分的另一个子阵列。

3. 发明申请

WO2009009568A2 AUGMENTED ELLIPTICAL MICROPHONE ARRAY 审中-公开
标题翻译：增强型椭圆麦克风阵列
公开(公告)号：WO2009009568A2
公开(公告)日：2009-01-15
申请号：PCT/US2008/069483
申请日：2008-07-09
申请人： MH ACOUSTICS, LLC , MEYER, Jens, M. , ELKO, Gary, W.
发明人： MEYER, Jens, M. , ELKO, Gary, W.
IPC分类号： H04R1/40 , H04R3/00
CPC分类号： H04R3/005 , H04R1/406 , H04R2201/401 , H04R2201/405 , H04R2410/01 , H04R2430/20
摘要： In one embodiment, an audio system has a microphone array and a signal processing subsystem that processes audio signals generated by the microphone array to produce an output beampattern. The microphone array has (i) a plurality of microphones arranged in a circular portion and (ii) a center microphone. The signal processing subsystem has (1) a decomposer that spatially decomposes the microphone audio signals to generate a plurality of eigenbeams and (2) a beamformer that generates the output beampattern as a weighted sum of the eigenbeams. By adding the center microphone, the audio system is able to provide some degree of control over the beamforming in the vertical direction as well as provide reduction of modal aliasin.
摘要翻译：在一个实施例中，音频系统具有麦克风阵列和信号处理子系统，其处理由麦克风阵列产生的音频信号以产生输出波束图。麦克风阵列具有（i）布置在圆形部分中的多个麦克风和（ii）中央麦克风。信号处理子系统具有（1）分解器，其对麦克风音频信号进行空间分解以生成多个特征波束，以及（2）波束生成器，其生成输出波束图作为特征波束的加权和。通过增加中心麦克风，音频系统可以对垂直方向的波束形成提供某种程度的控制，并减少模态混叠。

4. 发明申请

WO2007106399A2 NOISE-REDUCING DIRECTIONAL MICROPHONE ARRAY 审中-公开
标题翻译：噪声减少方向麦克风阵列
公开(公告)号：WO2007106399A2
公开(公告)日：2007-09-20
申请号：PCT/US2007/006093
申请日：2007-03-09
申请人： MH ACOUSTICS, LLC , ELKO, Gary, W. , GAENSLER, Thomas, Fritz , MEYER, Jens, M.
发明人： ELKO, Gary, W. , GAENSLER, Thomas, Fritz , MEYER, Jens, M.
IPC分类号： H04R3/00 , H04R25/00
CPC分类号： H04R1/326 , G10L21/0216 , G10L21/0264 , G10L2021/02166 , H04R3/005 , H04R3/04 , H04R25/407 , H04R2410/01 , H04R2410/07 , H04R2430/20 , H04R2430/21 , H04R2430/23
摘要： In one embodiment, a directional microphone array having (at least) two microphones generates forward and backward cardioid signals from two (e.g., omnidirectional) microphone signals. An adaptation factor is applied to the backward cardioid signal, and the resulting adjusted backward cardioid signal is subtracted from the forward cardioid signal to generate a (first-order) output audio signal corresponding to a beampattern having no nulls for negative values of the adaptation factor. After low-pass filtering, spatial noise suppression can be applied to the output audio signal. Microphone arrays having one (or more) additional microphones can be designed to generate second- (or higher-) order output audio signals.
摘要翻译：在一个实施例中，具有（至少）两个麦克风的定向麦克风阵列产生来自两个（例如全向）麦克风信号的前向和后向心形信号。将适应因子应用于后向心形信号，并且从前向心形信号中减去所得到的调整的后向心形信号，以产生对应于对于自适应因子的负值而不具有空值的波形图案的（一阶）输出音频信号。在低通滤波后，可以对输出音频信号应用空间噪声抑制。具有一个（或多个）附加麦克风的麦克风阵列可被设计成产生第二（或更高）级的输出音频信号。

5. 发明申请

WO2006110230A1 POSITION-INDEPENDENT MICROPHONE SYSTEM 审中-公开
标题翻译：位置独立麦克风系统
公开(公告)号：WO2006110230A1
公开(公告)日：2006-10-19
申请号：PCT/US2006/007800
申请日：2006-03-06
申请人： MH ACOUSTICS, LLC , ELKO, Gary, W. , MEYER, Jens, M.
发明人： ELKO, Gary, W. , MEYER, Jens, M.
IPC分类号： H04S3/00
CPC分类号： H04R3/005 , H04S3/002
摘要： An audio system generates position-independent auditory scenes using harmonic expansions based on me audio signals generated by a microphone array. In one embodiment, a plurality of audio sensors are mounted on the surface of a sphere. The number and location of the audio sensors on the sphere are designed to enable the audio signals generated by those sensors to be decomposed into a set of eigenbeam outputs. Compensation data corresponding to at least one of the estimated distance and the estimated orientation of the sound source relative to the array are generated from eigenbeam outputs and used to generate an auditory scene. Compensation based on estimated orientation involves steering a beam formed from the eigenbeam outputs in the estimated direction of the sound source to increase direction independence, while compensation based on estimated distance involves frequency compensation of the steered beam to increase distance independence.
摘要翻译：音频系统使用基于由麦克风阵列产生的音频信号的谐波扩展来产生与位置无关的听觉场景。在一个实施例中，多个音频传感器安装在球体的表面上。球体上的音频传感器的数量和位置被设计成使得由这些传感器产生的音频信号能够被分解成一组本征光束输出。相对于声源相对于阵列的估计距离和估计取向中的至少一个的补偿数据从本征波束输出产生并用于产生听觉场景。基于估计取向的补偿涉及到在声源的估计方向上由本征光束输出形成的光束来导向，以增加方向独立性，而基于估计距离的补偿涉及转向光束的频率补偿以增加距离独立性。

6. 发明申请

WO2016114988A2 REVERBERATION SUPPRESSION USING MULTIPLE BEAMFORMERS 审中-公开
标题翻译：使用多个光束的反射抑制
公开(公告)号：WO2016114988A2
公开(公告)日：2016-07-21
申请号：PCT/US2016/012609
申请日：2016-01-08
申请人： MH ACOUSTICS, LLC
发明人： ELKO, Gary, W. , DIETHORN, Eric, J. , BACKER, Steven , MEYER, Jens, M. , GAENSLER, Tomas, F.
IPC分类号： H04R3/00 , G10L21/0208
CPC分类号： H04R3/005 , G10L21/0208 , G10L21/0264 , G10L2021/02082 , G10L2021/02165 , G10L2021/02166 , H04R1/406 , H04R2201/403 , H04R2410/01 , H04R2410/05 , H04R2430/03
摘要： In one embodiment, an audio processing system reduces reverberation in an audio signal. A first beamformer generates a first, directional beampattern, and a second beamformer generates a second beampattern. A signal-processing subsystem (i) processes the first and second beampatterns to generate suppression factors corresponding to the reverberation and (ii) applies the suppression factors to one of the first and second beampatterns to reduce the reverberation in the beampattern. In one implementation, the beampatterns are crossed-beam beampatterns, and the signal- processing subsystem generates the suppression factors based on coherence estimates for the beampatterns. In another implementation, the beampatterns are disjoint beampatterns, and the signal-processing subsystem generates the suppression factors based on short-time and long-time envelope estimates for the beampatterns. Depending on the implementation, the beamformers may be co-located with differently shaped beampatterns or non-co-located with differently or equally shaped beampatterns.
摘要翻译：在一个实施例中，音频处理系统减少音频信号中的混响。第一波束形成器生成第一方向波形图，而第二波束形成器产生第二波形图。信号处理子系统（i）处理第一和第二波形图以产生与混响相对应的抑制因子，以及（ii）将抑制因子应用于第一和第二波形图中的一个，以减少波峰图案中的混响。在一个实现中，波形图是交叉波束图案，信号处理子系统基于波形图的相干估计产生抑制因子。在另一个实现中，波形图是不相交的波形图，信号处理子系统基于波形图的短时间和长时间包络估计产生抑制因子。根据实施方案，波束形成器可以与不同形状的波束形状共同定位，或者与不同或等同形状的波峰图案非共同定位。

7. 发明申请

WO2014062152A1 NOISE-REDUCING DIRECTIONAL MICROPHONE ARRAY 审中-公开
标题翻译：噪声减少方向麦克风阵列
公开(公告)号：WO2014062152A1
公开(公告)日：2014-04-24
申请号：PCT/US2012/060198
申请日：2012-10-15
申请人： MH ACOUSTICS, LLC
发明人： ELKO, Gary, W. , MEYER, Jens, M. , GAENSLER, Tomas, F.
IPC分类号： H04R3/00
CPC分类号： G10L21/0208 , G10K11/16 , H04R3/005 , H04R25/453 , H04R2410/01 , H04R2410/07
摘要： In one embodiment, a directional microphone array having (at least) two microphones mounted on opposite sides of a device generates forward and backward base signals from two (e.g., omnidirectional) microphone signals using diffraction filters and equalization filters. Each diffraction filter implements a (possibly different) transfer function representing the response of an audio signal traveling from a corresponding microphone around the device to the other microphone. A scale factor is applied to, for example, the backward base signal, and the resulting scaled backward base signal is combined with (e.g., subtracted from) the forward base signal to generate a first-order differential audio signal. After low-pass filtering, spatial noise suppression can be applied to the first-order differential audio signal. Microphone arrays having one (or more) additional microphones can be designed to generate second- (or higher-) order differential audio signals.
摘要翻译：在一个实施例中，具有安装在设备的相对侧上的（至少）两个麦克风的定向麦克风阵列使用衍射滤波器和均衡滤波器从两个（例如，全向）麦克风信号产生正向和反向基本信号。每个衍射滤波器实现（可能不同的）传递函数，其表示从设备周围的相应麦克风传播到另一麦克风的音频信号的响应。比例因子被应用于例如反向基本信号，并且所得到的缩放的后向基本信号与（例如，从前向基础信号中减去）组合以产生一阶差分音频信号。在低通滤波之后，空间噪声抑制可以应用于一阶差分音频信号。具有一个（或多个）附加麦克风的麦克风阵列可被设计成产生第二（或更高）级的差分音频信号。

8. 发明申请

WO2015013058A1 ADAPTIVE BEAMFORMING FOR EIGENBEAMFORMING MICROPHONE ARRAYS 审中-公开
标题翻译：用于微波炉阵列的自适应波束形成
公开(公告)号：WO2015013058A1
公开(公告)日：2015-01-29
申请号：PCT/US2014/046607
申请日：2014-07-15
申请人： MH ACOUSTICS, LLC
发明人： ELKO, Gary, W. , MEYER, Jens, M.
IPC分类号： H04R3/00
CPC分类号： H04R1/326 , H04R3/005 , H04R3/04 , H04R2201/401 , H04R2430/23 , H04S2400/15
摘要： An exemplary audio signal processing system includes a modal decomposer and an adaptive modal beamformer. The modal decomposer generates a plurality of zeroth-order eigenbeams from audio signals from an (e.g., spherical) array of audio sensors. The adaptive modal beamformer (i) steers the zeroth-order eigenbeams to a specified direction, (ii) adaptively generates a plurality of weighting coefficients for the plurality of zeroth-order eigenbeams, where the plurality of weighting coefficients satisfy a constraint of having only non-negative values, (iii) respectively applies the plurality of adaptively generated weighting coefficients to the plurality of steered, zeroth-order eigenbeams to generate a plurality of weighted, steered, zeroth-order eigenbeams, and (iv) combines the plurality of weighted, steered, zeroth-order eigenbeams to generate an output audio signal. Some embodiments have a further constraint that the weighting coefficients sum to a specified value (e.g., one).
摘要翻译：示例性音频信号处理系统包括模态分解器和自适应模态波束形成器。模态分解器从音频传感器（例如，球面）阵列的音频信号产生多个零级本征束。自适应模态波束形成器（i）将第零阶本征波束引导到指定方向，（ii）自适应地生成多个零阶本征波束的多个加权系数，其中多个加权系数满足只有非零阶本征波束的约束，（iii）分别将多个自适应生成的加权系数分别应用于多个转向零阶本征束，以生成多个加权的，转向的零级本征束，并且（iv）将多个加权的，转向，零阶本征波束以产生输出音频信号。一些实施例具有进一步的约束，即加权系数与指定值（例如，一个）相加。

9. 发明申请

WO2014055312A1 EARPHONES HAVING CONFIGURABLE MICROPHONE ARRAYS 审中-公开
标题翻译：具有可配置麦克风阵列的耳机
公开(公告)号：WO2014055312A1
公开(公告)日：2014-04-10
申请号：PCT/US2013/061789
申请日：2013-09-26
申请人： MH ACOUSTICS, LLC
发明人： DIETHORN, Eric, J. , ELKO, Gary, W. , MEYER, Jens, M. , GAENSLER, Tomas, F.
IPC分类号： H04R29/00 , H04R1/10
CPC分类号： H04R1/1091 , H04M1/05 , H04R1/10 , H04R29/005 , H04R2201/107
摘要： Accessories for a telephone include at least one earphone and at least one microphone array having multiple microphones used to generate outgoing audio signals for (i) processing by a signal processor and (ii) transmission by the telephone. In one embodiment, two earphones are connected by two corresponding wires, and two microphone arrays, respectively connected to the two wires, are mechanically and electronically configurable in a plurality of use modes to generate outgoing audio signals for processing by the signal processor. The use modes include one or more and possibly all of a single-sided mode, a two-sided mode, an enhanced directivity mode, a stereo recording mode, a multichannel recording mode, a conference mode, and a two-dimensional-array mode, where one of the use modes is automatically detected by the signal processor based on the audio signals generated by the two microphone arrays.
摘要翻译：用于电话的附件包括至少一个耳机和至少一个具有多个麦克风的麦克风阵列，用于产生输出音频信号，用于（i）由信号处理器处理和（ii）由电话进行的传输。在一个实施例中，两个耳机通过两个对应的导线连接，并且分别连接到两条导线的两个麦克风阵列以多种使用模式机械地和电子地配置，以产生输出音频信号以供信号处理器处理。使用模式包括单面模式，双面模式，增强指向性模式，立体声记录模式，多通道记录模式，会议模式和二维阵列模式中的一个或多个且可能全部其中，使用模式之一由信号处理器基于由两个麦克风阵列产生的音频信号自动检测。

10. 发明申请

WO2007059255A1 DUAL-MICROPHONE SPATIAL NOISE SUPPRESSION 审中-公开
标题翻译：双麦克风空间噪声抑制
公开(公告)号：WO2007059255A1
公开(公告)日：2007-05-24
申请号：PCT/US2006/044427
申请日：2006-11-15
申请人： MH ACOUSTICS, LLC , ELKO, Gary, W.
发明人： ELKO, Gary, W.
IPC分类号： H04R3/00
CPC分类号： H04R3/005 , H04R25/407 , H04R2201/403 , H04R2410/05 , H04R2430/20 , H04R2499/11
摘要： Spatial noise suppression for audio signals involves generating a ratio of powers of difference and sum signals of audio signals from two microphones and then performing noise suppression processing, e.g., on the sum signal where the suppression is limited based on the power ratio. In certain embodiments, at least one of the signal powers is filtered (e.g., the sum signal power is equalized) prior to generating the power ratio. In a subband implementation, sum and difference signal powers and corresponding the power ratio are generated for different audio signal subbands, and the noise suppression processing is performed independently for each different subband based on the corresponding subband power ratio, where the amount of suppression is derived independently for each subband from the corresponding subband power ratio. In an adaptive filtering implementation, at least one of the audio signals can be adaptively filtered to allow for array self-calibration and modal-angle variability.
摘要翻译：用于音频信号的空间噪声抑制涉及产生来自两个麦克风的音频信号的差分和和信号的比率，然后执行噪声抑制处理，例如基于功率比限制抑制的和信号。在某些实施例中，在产生功率比之前，将信号功率中的至少一个滤波（例如，和信号功率相等）。在子带实现中，针对不同的音频信号子带生成和差信号功率和相应的功率比，并且基于对应的子带功率比，针对每个不同的子带独立地执行噪声抑制处理，其中抑制的量被导出从每个子带独立地从相应的子带功率比。在自适应滤波实现中，音频信号中的至少一个可以被自适应地滤波以允许阵列自校准和模态角变化。

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