公开(公告)号：WO2008090342A3

公开(公告)日：2008-10-30

申请号：PCT/GB2008000237

申请日：2008-01-23

Applicant: WOLFSON MICROELECTRONICS PLC ,  SIBBALD ALASTAIR ,  HOWLE MARTIN

Inventor： SIBBALD ALASTAIR ,  HOWLE MARTIN

IPC: H04R3/00 ,  G10K11/178

CPC classification number: H04R3/00 ,  G10K11/178 ,  G10K2210/1081 ,  H04R1/1083

Abstract: The invention provides improved ambient noise reduction for ear-worn devices, such as earphones and headphones and for other devices worn upon or used in close proximity to the ear, such as cellular telephone handsets, and it provides, in particular, improvements to "feed-forward" ambient noise-reduction systems. Most feed-forward noise-reduction systems available hitherto purport to operate only below about 1 kHz and, even then, provide only relatively modest amounts of noise reduction. In accordance with this invention, predetermined filter parameters, such as the gain and cut-off frequency of a selected filter stage used in the noise-reduction processing, are mathematically modelled and the model is adjusted in real-time, in response to user-interpretation of a graphical display of a predicted residual noise amplitude spectrum. This allows the user to inspect the predicted residual noise level amplitude spectrum and to iteratively adjust the filter parameters to minimise residual noise in a chosen environment. Instead of being made manually by a user, the iterative adjustments may be automated and implemented under computer control, using known data-fitting methods and/or neural networks.

Abstract translation: 本发明为诸如耳机和头戴式耳机之类的耳戴式设备以及佩戴在耳朵上或靠近耳朵使用的其他设备（诸如蜂窝式电话手持设备）提供了改善的环境噪声降低，并且特别地提供了对“馈送 前向“环境降噪系统。 迄今为止，大多数可用的前馈降噪系统只能在约1kHz以下工作，即使这样，也只能提供相对适中的降噪量。 根据本发明，响应于用户定义的参数，在数学上建模预定的滤波器参数（例如在降噪处理中使用的选定滤波器级的增益和截止频率）并且实时调节模型， 解释预测的残余噪声振幅谱的图形显示。 这允许用户检查预测的残余噪声电平幅度谱并且迭代地调整滤波器参数以最小化所选环境中的残余噪声。 使用已知的数据拟合方法和/或神经网络，代替由用户手动进行，迭代调整可以被自动化并且在计算机控制下实现。

公开(公告)号：WO2008090342A2

公开(公告)日：2008-07-31

申请号：PCT/GB2008/000237

申请日：2008-01-23

Applicant: WOLFSON MICROELECTRONICS PLC ,  SIBBALD, Alastair ,  HOWLE, Martin

Inventor： SIBBALD, Alastair ,  HOWLE, Martin

IPC: H04R3/00 ,  G10K11/178

CPC classification number: H04R3/00 ,  G10K11/178 ,  G10K2210/1081 ,  H04R1/1083

Abstract: The invention provides improved ambient noise reduction for ear-worn devices, such as earphones and headphones and for other devices worn upon or used in close proximity to the ear, such as cellular telephone handsets, and it provides, in particular, improvements to "feed-forward" ambient noise-reduction systems. Most feed-forward noise-reduction systems available hitherto purport to operate only below about 1 kHz and, even then, provide only relatively modest amounts of noise reduction. In accordance with this invention, predetermined filter parameters, such as the gain and cut-off frequency of a selected filter stage used in the noise-reduction processing, are mathematically modelled and the model is adjusted in real-time, in response to user-interpretation of a graphical display of a predicted residual noise amplitude spectrum. This allows the user to inspect the predicted residual noise level amplitude spectrum and to iteratively adjust the filter parameters to minimise residual noise in a chosen environment. Instead of being made manually by a user, the iterative adjustments may be automated and implemented under computer control, using known data-fitting methods and/or neural networks.

Abstract translation: 本发明提供了用于诸如耳机和耳机的耳戴设备以及佩戴在耳朵附近或用于其附近的其他设备（诸如蜂窝电话手机）的改进的环境噪声降低，并且特别地提供了对“馈送” 前向“环境降噪系统。 迄今为止，大多数前馈降噪系统仅在低于约1 kHz的情况下运行，即使如此，仅提供相对适量的降噪。 根据本发明，在数学上对噪声降低处理中使用的所选滤波器级的增益和截止频率等预定滤波器参数进行数学建模，并且响应于用户 - 解释预测残差噪声振​​幅谱的图形显示。 这允许用户检查预测的残余噪声电平振幅谱，并且迭代地调整滤波器参数以使所选择的环境中的残余噪声最小化。 使用已知的数据拟合方法和/或神经网络，不是由用户手动进行的，而是可以在计算机控制下实现迭代调整。

公开(公告)号：WO2010013031A1

公开(公告)日：2010-02-04

申请号：PCT/GB2009/050915

申请日：2009-07-23

Applicant: WOLFSON MICROELECTRONICS PLC ,  SIBBALD, Alastair ,  HOWLE, Martin

Inventor： SIBBALD, Alastair ,  HOWLE, Martin

IPC: H04R29/00

CPC classification number: H04R29/001 ,  H04M1/24

Abstract: An ear simulator has an inlet port (62), for receiving sounds from a speaker (18) of a communications device such a mobile phone handset (12), and has an outlet port (38) in an opposite surface. The ear simulator has at least one additional aperture (60) in the same surface as the inlet port (62), representing acoustic leakage around a mobile phone held against a user's ear. This allows the ear simulator to provide measurement results that more accurately represent the frequency dependent phase response of the transfer function from the handset loudspeaker driver to the ear of a user of the handset.

Abstract translation: 耳模拟器具有入口端口（62），用于从诸如移动电话听筒（12）的通信设备的扬声器（18）接收声音，并且在相对表面中具有出口端口（38）。 耳模拟器在与入口端口（62）相同的表面中具有至少一个额外的孔（60），表示围绕用户耳朵的移动电话周围的声学泄漏。 这允许耳模拟器提供测量结果，该测量结果更准确地表示传递函数从手机扬声器驱动器到听筒用户的耳朵的频率相关相位响应。

公开(公告)号：WO2008099137A1

公开(公告)日：2008-08-21

申请号：PCT/GB2008/000400

申请日：2008-02-06

Applicant: WOLFSON MICROELECTRONICS PLC ,  SIBBALD, Alastair ,  HOWLE, Martin

Inventor： SIBBALD, Alastair ,  HOWLE, Martin

IPC: H04R1/22 ,  H04R1/10

CPC classification number: H04R3/002 ,  H04R1/1008 ,  H04R1/1016 ,  H04R1/1083 ,  H04R1/2873

Abstract: An ear-worn speaker carrying device ("ESD") incorporating active ambient noise reduction circuitry is provided with a seal intended to contact or surround the ear of a user; the seal being intended to present a substantial impedance to inward or outward transmission of sound to or from the ear. At least one acoustic channel of predetermined dimensions bypasses the seal to providing an acoustic leakage path of known characteristics, thereby permitting predetermined levels of sound to enter and exit by way of the channel, such that minor variations in leakage, dependent, for example, upon precise mounting of the seal to the ear as used from time to time, are rendered relatively unimportant. In a preferred embodiment, the device further comprises an acoustic conduit connected to vent the speaker's rear surface to the external ambient, and respective exit apertures for the acoustic channel and the acoustic conduit are so relatively located that sounds exiting from them tend to cancel each other, reducing sound emissions from the device.

Abstract translation: 包含有效环境噪声降低电路的耳式扬声器承载装置（“ESD”）具有旨在接触或围绕使用者耳朵的密封件; 密封件旨在呈现对来自耳朵或从耳朵的声音的向内或向外传输的实质阻抗。 具有预定尺寸的至少一个声通道绕过密封件以提供已知特性的声学泄漏路径，从而允许预定水平的声音通过通道进入和离开，使得泄漏的微小变化依赖于例如 不时将密封件精确地安装到耳朵上是相对不重要的。 在优选实施例中，该装置还包括连接到扬声器后表面以将外部环境排放的声导管，并且用于声学通道和声导管的相应出口孔相对定位，使得从它们离开的声音倾向于彼此抵消 ，减少设备的声音排放。