公开(公告)号：WO2008003135A1

公开(公告)日：2008-01-10

申请号：PCT/AU2007/000927

申请日：2007-07-03

Applicant: DYNAMIC HEARING PTY LTD ,  STEELE, Brenton, Robert ,  GRANT, Michael, John

Inventor： STEELE, Brenton, Robert ,  GRANT, Michael, John

IPC: H04B15/00 ,  H04R25/00

CPC classification number: H04R25/453

Abstract: A system and technique for feedback cancellation. An off-line feedback estimation filter is adaptive in response to an error signal. An on-line feedback cancellation filter produces a feedback cancellation signal. The on-line feedback cancellation filter is updated by deriving on-line filter taps from taps of the off-line filter, with the update occurring when a tonality measure determined from the off-line filter taps meets a pre-defined criterion. The tonality measure may include reference to non-causal filter taps.

Abstract translation: 用于反馈取消的系统和技术。 离线反馈估计滤波器响应于误差信号而自适应。 在线反馈消除滤波器产生反馈消除信号。 通过从离线滤波器的抽头导出在线滤波器抽头来更新在线反馈消除滤波器，当从离线滤波器抽头确定的音调度量符合预定义的准则时，更新发生。 音调测量可能包括非因果滤波器抽头。

公开(公告)号：WO2007095664A1

公开(公告)日：2007-08-30

申请号：PCT/AU2006/001778

申请日：2006-11-23

Applicant: DYNAMIC HEARING PTY LTD ,  DICKSON, Bonar ,  STEELE, Brenton, Robert

Inventor： DICKSON, Bonar ,  STEELE, Brenton, Robert

IPC: H03H17/02

CPC classification number: H03H21/0012 ,  G10L21/0364 ,  H03H17/0211 ,  H03H17/0294 ,  H03H21/0016 ,  H04R25/505 ,  H04R2225/43

Abstract: Adaptively processing an input signal, such as an input signal of a hearing aid. The input signal is passed through an adaptive time domain filter to produce an output signal. At least one of the input signal and the output signal is used as an analysis signal. The analysis signal is transformed into a transform domain to produce a transformed analysis signal, which is analysed to produce a desired gain for each respective transform domain sub-band. A minimum phase time domain filter characteristic is synthesised which approaches the desired gains. The adaptive filter is updated with the synthesised filter characteristic.

Abstract translation: 自适应地处理输入信号，例如助听器的输入信号。 输入信号通过自适应时域滤波器产生输出信号。 使用输入信号和输出信号中的至少一个作为分析信号。 将分析信号变换为变换域以产生经变换的分析信号，其被分析以产生每个相应变换域子带的期望增益。 合成接近期望增益的最小相位时域滤波器特性。 自适应滤波器用合成滤波器特性进行更新。

公开(公告)号：WO2006058361A1

公开(公告)日：2006-06-08

申请号：PCT/AU2004/001691

申请日：2004-12-04

Applicant: DYNAMIC HEARING PTY LTD ,  BLAMEY, Peter, John ,  DICKSON, Bonar ,  STEELE, Brenton, Robert ,  STEINBERG, Margaret, Jane

Inventor： BLAMEY, Peter, John ,  DICKSON, Bonar ,  STEELE, Brenton, Robert ,  STEINBERG, Margaret, Jane

IPC: G10L21/02 ,  H04R25/00

CPC classification number: H04R5/04

Abstract: An input sound signal (210) is processed in order to meet a target dynamic range (910, 920). At least one gain, specific to the input sound signal (210), is applied to the input sound signal (210) to produce a processed sound signal (214). A dynamic range of the processed sound signal is measured, and a match of the measured dynamic range with the target dynamic range (910, 920) is determined. The gain is adjusted in accordance with at least one input sound signal -specific parameter, to improve the match of dynamic range of the processed sound signal (214) to the target dynamic range (910, 920). The input sound signal -specific parameter is adaptive in response to at least one monitored signal condition.

Abstract translation: 处理输入声音信号（210）以便满足目标动态范围（910,920）。 特定于输入声音信号（210）的至少一个增益被施加到输入声音信号（210）以产生经处理的声音信号（214）。 测量经处理的声音信号的动态范围，并且确定所测量的动态范围与目标动态范围（910,920）的匹配。 根据至少一个输入声音信号特定参数来调整增益，以改善处理后的声音信号（214）的动态范围与目标动态范围（910,920）的匹配。 输入声音信号特定参数响应于至少一个监视信号条件而自适应。

公开(公告)号：WO2005055644A1

公开(公告)日：2005-06-16

申请号：PCT/AU2004/001071

申请日：2004-08-11

Applicant: DYNAMIC HEARING PTY LTD ,  STEELE, Brenton, Robert

Inventor： STEELE, Brenton, Robert

IPC: H04R3/00

CPC classification number: H04R1/406 ,  H04R3/005 ,  H04R25/407 ,  H04R2499/11

Abstract: The invention relates to adaptive directional systems, and more particularly to a method and apparatus for producing adaptive directional signals. The invention may be applied to the provision of audio frequency adaptive directional microphone systems for devices such as hearing aids and mobile telephones. The method involves constructing the adaptive directional signal (46) from a weighted sum of a first signal (42A) having an omni-directional polar pattern and a second signal (42B) having a bi-directional polar pattern, wherein the weights are calculated to give the combined signal a constant gain in a predetermined direction and to minimise the power of the combined signal. The mehtod has particular application in producing signals in digital hearing aids, the predetermined direction being in the forward direction with respect to the wearer.

Abstract translation: 本发明涉及自适应定向系统，更具体地涉及用于产生自适应方向信号的方法和装置。 本发明可以应用于为诸如助听器和移动电话的设备提供音频自适应定向麦克风系统。 该方法包括从具有全向极坐标图案的第一信号（42A）和具有双向极坐标图案的第二信号（42B）的加权和构建自适应方向信号（46），其中权重被计算为 给予组合信号在预定方向上的恒定增益并且使组合信号的功率最小化。 mehtod特别适用于在数字助听器中产生信号，预定方向相对于佩戴者在向前方向。