公开(公告)号：WO00068936A1

公开(公告)日：2000-11-16

申请号：PCT/GB2000/001715

申请日：2000-05-05

IPC: G10L15/20 ,  G10L21/0208 ,  H04R3/02 ,  G10L21/02

CPC classification number: G10K11/175 ,  G10L15/20 ,  G10L21/0208

Abstract: System for cancellation of non-stationary interfering signals, particularly for use for mitigating effects of such interferers produced by in-car entertainment (ECAD) devices for speech recognition applications. The system spectrally analyses signals output by the ECAD before and after they are passed through an in-car acoustic channel. A model of the acoustic channel is built by the system's algorithm. For speech recognition the model is spectrally subtracted from a signal received at a microphone in order to recover a wanted speech signal. The acoustic channel model is built by estimating frequency domain acoustic transfer functions between each loudspeaker used by the ECAD and the microphone.

Abstract translation: 用于消除非平稳干扰信号的系统，特别是用于减轻由用于语音识别应用的车载娱乐（ECAD）设备产生的这种干扰源的影响。 该系统光谱分析ECAD在通过车载声道之前和之后输出的信号。 声道的模型是由系统的算法构建的。 对于语音识别，该模型在从麦克风接收到的信号中被频谱地减去，以便恢复所需的语音信号。 通过估计ECAD和麦克风使用的每个扬声器之间的频域声学传递函数来建立声道模型。

公开(公告)号：WO00019605A2

公开(公告)日：2000-04-06

申请号：PCT/US1999/022757

申请日：1999-09-30

IPC: H04R3/02 ,  H03H21/00 ,  H04B3/23 ,  H04R25/00

CPC classification number: H04R25/453 ,  H03H21/0012

Abstract: An improved method for adaptively cancelling acoustic feedback in hearing aids and other audio amplification devices. Feedback cancellation is limited to a frequency band that encompasses all unstable frequencies. By limiting the bandwidth of the feedback cancellation signal, the distortion due to the adaptive filter is minimized and limited only to the unstable feedback regions. A relatively simple signal processing algorithm is used to produce highly effective results with minimal signal distortion.

Abstract translation: 自适应抑制助听器和其他放大音频设备中拉森效应的改进方法。 拉森效应的抑制仅限于包含所有不稳定频率的频带。 通过限制拉尔森消除信号的频带，自适应滤波器引起的失真被最小化，该失真仅限于反馈效应的不稳定区域。 使用相对简单的信号处理算法来获得令人信服的结果，并使信号失真最小。

公开(公告)号：WO99057938A1

公开(公告)日：1999-11-11

申请号：PCT/EP1999/003031

申请日：1999-05-04

IPC: G10L15/20 ,  G10L21/02 ,  H04R3/02

CPC classification number: H04R3/02

Abstract: The invention relates to a method and a device for operating voice-controlled systems, such as communication and/or intercommunication systems in motor vehicles. According to the invention voice signals are received in a multiple microphone system and transmitted to at least one loudspeaker. The aim of the invention is to eliminate feedback with a method and device of this kind. To this end the invention provides for the voice signal or voice signal spectrum first to be subjected to a low-value DELTA F frequency shift before being transmitted to the loudspeaker(s) or the input of a voice-controlled device.

Abstract translation: 本发明涉及一种方法和装置，用于操作语音控制系统，例如通信和/或语音/在机动车辆内部通信设备，其特征在于，在多麦克风阵列记录的语音信号，并且传递到至少一个扬声器。 为了保证在一个方法，并且此类型的反馈被消除的装置，根据本发明，提出的是，语音信号或语音信号的频谱是由少量DELTA F和随后的第一中，或扬声器或到输入偏移的第一频率 所述受控设备被添加。

公开(公告)号：WO99041898A1

公开(公告)日：1999-08-19

申请号：PCT/DE1999/000094

申请日：1999-01-18

IPC: H04R3/02 ,  H04B3/20 ,  H04M1/60 ,  H04M9/08

CPC classification number: H04M9/08

Abstract: The present invention relates to a method for improving acoustic noise attenuation in hand-free devices essentially used in automobiles, wherein said method uses a level balance (22) as well as a plurality of echo-compensation adaptive filters (34) each for processing a given partial band. In at least one partial band, another adaptive filter (shadow filter 36) of a lower order is connected in parallel to an adaptive echo-compensation filter (34). Spatial modifications can thus be determined on the basis of a combined estimation which comprises a correlation analysis as well as a residual-error comparison of the two concurring filters (34, 36).

Abstract translation: 改善在免提设备的声侧音衰减，特别是用于机动车辆中使用，其包括一个电平鉴别器（22）和多个自适应回声补偿滤波器（34），其中的每一个处理每个子带的的方法，其中进一步的自适应滤波器（阴影过滤器（在至少一个子带36） ）低阶并联连接到自适应回声消除滤波器（34）和空间变化鉴定通过相关性分析的组合的评价和残留误差比较两个竞争自适应滤波器（34，36）。

公开(公告)号：WO99021396A1

公开(公告)日：1999-04-29

申请号：PCT/JP1998/004744

申请日：1998-10-20

IPC: G01H3/08 ,  H04B15/00 ,  H04R3/02

CPC classification number: H04R3/02

Abstract: A howling eliminator comprises a frequency analyzing means (32) for detecting the howling frequency, means (20) for removing the howling frequency band detected by the frequency analyzing means, and means (30) for controlling the characteristics of both the frequency analyzing means and the band removing means. The input frequency is subjected to wideband division and divided into a plurality of frequency bands, the frequency analyzing means detects the howling state of the divided frequency bands. When howling is detected in a specific divided frequency band, the frequency band is subdivided into a plurality of narrow bands and the narrow bands including howling are detected. A band removing means is controlled to remove the frequency band in which howling is taking place. Howling detecting time is shortened while minimizing the hardware.

Abstract translation: 啸声消除器包括用于检测啸叫频率的频率分析装置（32），用于去除由频率分析装置检测的啸叫频带的装置（20），以及用于控制频率分析装置和 带去除装置。 输入频率经过宽带划分并分成多个频带，频率分析装置检测分频频带的啸叫状态。 当在特定分频带中检测到啸声时，将频带细分为多个窄带，并且检测包括啸叫的窄带。 控制带去除装置以去除发生啸叫的频带。 啸声检测时间缩短，同时最小化硬件。

公开(公告)号：WO99014985A1

公开(公告)日：1999-03-25

申请号：PCT/US1998/019237

申请日：1998-09-15

IPC: H04R25/00 ,  H04R3/02

CPC classification number: H04R25/453 ,  H04R25/502

Abstract: At least one, and advantageously two, accelerometers (14, 16) are physically secured to parts of a hearing aid, advantageously a CIC hearing aid. The accelerometers are operatively connected with a feedback processor (18). When the outputs from the accelerometers indicate that feedback is occurring, the feedback processor processes the audio signal from the microphone (10) in such a manner as to eliminate the feedback or at least to hold it to an inaudible level.

Abstract translation: 至少一个有利的两个加速度计（14,16）被物理地固定到助听器的一部分，有利地是CIC助听器。 加速度计与反馈处理器（18）可操作地连接。 当来自加速度计的输出指示正在发生反馈时，反馈处理器以这样的方式处理来自麦克风（10）的音频信号，以消除反馈或至少将其保持在听不到的水平。

公开(公告)号：WO98047276A1

公开(公告)日：1998-10-22

申请号：PCT/FR1998/000757

申请日：1998-04-15

IPC: H04R3/02 ,  G10K15/00 ,  G10L21/02 ,  H04M1/60 ,  H04M9/08 ,  H04M11/06 ,  H04S1/00

CPC classification number: H04M9/082

Abstract: In order to cancel echo on several sound signal channels, the method consists in generating on each channel a synthetic signal having the spectral characteristics of a white noise; computing the frequency masking thresholds in several adjacent frequency bands using auditory perception properties; bringing in each frequency channel the synthetic signal level to the associated masking threshold value, so as to obtain an auxiliary signal, which is added to the signal associated with the loudspeaker of the channel concerned; supplying the resulting signal to an adaptive filter; adding the output signals of the associated adaptive filters to each microphone channel; subtracting the resulting signal received by the microphone of this channel; deducing an estimation error, on the basis of which the coefficients of the adaptive filters associated with this channel are corrected.

Abstract translation: 为了消除多个声音信道上的回波，该方法在于在每个信道上生成具有白噪声的频谱特性的合成信号; 使用听觉感知特性计算几个相邻频带中的频率屏蔽阈值; 将每个频道中的合成信号电平引入相关联的掩蔽阈值，以获得附加到与所述信道的扬声器相关联的信号的辅助信号; 将所得到的信号提供给自适应滤波器; 将相关联的自适应滤波器的输出信号添加到每个麦克风通​​道; 减去由该通道的麦克风接收的结果信号; 推导出估计误差，在此基础上校正与该信道相关联的自适应滤波器的系数。

公开(公告)号：WO2023081645A1

公开(公告)日：2023-05-11

申请号：PCT/US2022/079056

申请日：2022-11-01

Applicant: SHURE ACQUISITION HOLDINGS, INC.

Inventor： MOLES, Steven, Christopher ,  MOORE, Stephen, David ,  LESTER, Michael, Ryan

IPC: H04R3/00 ,  G06F3/16 ,  G10L21/0208 ,  H04B1/20 ,  H04R1/40 ,  H04R27/00 ,  H04R3/02 ,  H04M9/08

Abstract: Systems and methods are disclosed for operating a wireless audio network including a plurality of wireless microphone units (e.g., wireless delegate units) and a central access point having a mixer. The wireless microphone units may perform voice detection and level sensing, and make a preliminary gating decision. The central access point may make a final gating decision, determine the granting of wireless communications channels, and generate a final mixed audio output signal.

公开(公告)号：WO2023276424A1

公开(公告)日：2023-01-05

申请号：PCT/JP2022/018597

申请日：2022-04-22

Applicant: パナソニック　インテレクチュアル　プロパティ　コーポレーション　オブ　アメリカ

Inventor： 古川　博基 ,  杠　慎一

IPC: H04R3/02

Abstract: ハウリング抑圧装置（１００）は、スピーカ（３）へ出力される出力信号を参照信号として、スピーカ（３）からマイクロホン（１）に入力される音響フィードバック音の特性を表す音響フィードバック特性を推定し、推定した音響フィードバック特性を用いて、マイクロホン（１）から得られる入力信号から音響フィードバック音を消去する適応フィルタ部（１０１）と、音響フィードバック特性に基づいて、周波数領域の音響フィードバック振幅周波数特性を推定する推定部（１０２）と、音響フィードバック振幅周波数特性から、音響フィードバック振幅周波数特性の周波数ピークを平坦化するための周波数領域の抑圧ゲインを算出する抑圧ゲイン算出部（１０３）と、抑圧ゲインを用いて、適応フィルタ部（１０１）からの出力信号を周波数領域で抑圧する抑圧部（１０４）とを備える。

公开(公告)号：WO2022240878A1

公开(公告)日：2022-11-17

申请号：PCT/US2022/028596

申请日：2022-05-10

Applicant: VESPER TECHNOLOGIES INC.

Inventor： CARFORE, Michael ,  SARAF, Tomer

IPC: H04R3/02 ,  H04R3/04 ,  H04R3/06 ,  H04R3/08 ,  H04R19/04 ,  H01L41/1132 ,  H04R2201/003 ,  H04R3/002 ,  H04R3/007

Abstract: Illustrative embodiments enable a MEMS transducer to quickly recover from, acoustic overload events by quickly resetting signal processing circuitry downstream from a MEMS transducer. An acoustic overload sensor detects occurrence of an acoustic overload event, and triggers a reset circuit to operate a set of switches to rapidly drain charge from a corresponding set of capacitances within the transducer, or within the signal processing circuitry, thereby resetting the signal processing circuitry more rapidly than would occur if said transducer or circuitry were allowed to recover on its own.