公开(公告)号：WO2004100690A3

公开(公告)日：2005-02-10

申请号：PCT/SG2004000128

申请日：2004-05-12

Applicant: BITWAVE PRIVATE LTD ,  HUI SIEW KOK ,  LOH KOK HENG ,  PANG PETER ,  WANG SHUNLI

Inventor： HUI SIEW KOK ,  LOH KOK HENG ,  PANG PETER ,  WANG SHUNLI

IPC: A41D20060101 ,  H04R1/00 ,  H04R1/40

CPC classification number: H04R1/406

Abstract: A facemask communication system includes a plurality of microphones (101) within the inside compartment of the facemask for detecting sounds voiced by the wearer. The microphones (101) have cardioid sound reception patterns even when the region at the rear of the microphones are blocked by channeling sound to the rear surfaces of the diaphragms through a sound guide. The signals from the microphones are wirelessly transmitted through the transparent window (205) of the facemask using electromagnetic radiation. After transmission through the transparent window (205), signal processing is performed on the signals. A digital signal processor processes the audio signal generated by the microphones in the time and frequency domain. The signal processor can include at least one adaptive filter to enhance a wanted signal in the audio signal and at least one adaptive filter to reduce an unwanted signal in the audio signal. Breathing noise in the signals is reduced using a plurality of microphones to provide signals to the signal processor. The system provides voice recognition for automatically responding to commands.

Abstract translation: 面罩通信系统包括在面罩的内部隔间内的多个麦克风（101），用于检测佩戴者发出的声音。 麦克风（101）即使当通过声音引导器将声音传播到隔膜的后表面而阻止麦克风的后面的区域时，也具有心形声音接收图案。 来自麦克风的信号通过使用电磁辐射的面罩的透明窗口（205）无线传输。 在通过透明窗口（205）传输之后，对信号进行信号处理。 数字信号处理器在时域和频域处理由麦克风产生的音频信号。 信号处理器可以包括至少一个自适应滤波器，以增强音频信号中的有用信号和至少一个自适应滤波器，以减少音频信号中不需要的信号。 使用多个麦克风来减少信号中的呼吸噪声以向信号处理器提供信号。 系统提供自动响应命令的语音识别。

公开(公告)号：WO03036614A2

公开(公告)日：2003-05-01

申请号：PCT/SG0200149

申请日：2002-07-02

Applicant: BITWAVE PRIVATE LTD ,  HUI SIEW KOK ,  LOH KOK HENG ,  LAU YEAN MING

Inventor： HUI SIEW KOK ,  LOH KOK HENG ,  LAU YEAN MING

IPC: G10L15/20 ,  G10L21/0208 ,  G10L21/0216 ,  H04M1/27 ,  H04M1/60 ,  H04M1/725 ,  G10L

CPC classification number: H04M1/6033 ,  G10L15/20 ,  G10L21/0208 ,  G10L2021/02161 ,  G10L2021/02168 ,  H04M1/271

Abstract: A headset system is proposed including a headset unit to be worn by a user and having two or more microphones, and a base unit in wireless communication with the headset. Signals received from the microphones are processed using a first adaptive filter to enhance a target signal, and then divided and supplied to a second adaptive filter arranged to reduce interference signals and a third filter arranged to reduce noise. The outputs of the second and third filters are combined, and are be subject to further processing in the frequency domain. The results are transmitted to a speech recognition engine.

Abstract translation: 提出一种耳机系统，其包括要由用户佩戴并具有两个或更多个麦克风的头戴耳机单元以及与耳机无线通信的基座单元。 使用第一自适应滤波器处理从麦克风接收的信号以增强目标信号，然后被分频并提供给布置成减少干扰信号的第二自适应滤波器和布置成降低噪声的第三滤波器。 第二和第三滤波器的输出被组合，并且在频域中被进一步处理。 结果被传送到语音识别引擎。