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1. 发明授权

US08553898B2 Method and system for reducing acoustical reverberations in an at least partially enclosed space 有权
标题翻译：用于减少至少部分封闭空间中的声音混响的方法和系统
公开(公告)号：US08553898B2
公开(公告)日：2013-10-08
申请号：US12627608
申请日：2009-11-30
申请人： Emmet Raftery
发明人： Emmet Raftery
IPC分类号： H04B3/20 , A61F11/06 , G10K11/16 , H03B29/00
CPC分类号： G10K11/178 , G10K2210/12 , G10K2210/505
摘要： A method of increasing the intelligibility of an audio broadcast in an at least partially enclosed space from at least one amplified audio source. An input microphone receives an incident audio wavefront at a first position in the at least partially enclosed space. An active noise control system is employed to generate a cancelling audio wavefront having a magnitude substantially equal to the magnitude of incident audio wavefront and a phase substantially opposite to the phase of the incident audio wavefront. The cancelling audio wavefront is broadcast at a second position in the at least partially enclosed space adjacent to a reflective surface of the at least partially enclosed space so as to attenuate the incident audio wavefront substantially at or near the reflective surface in order to reduce reverberations of the incident audio wavefront. In this manner, reverberations which could reduce the intelligibility of the audio broadcast to an audience is reduced.
摘要翻译：一种从至少一个放大的音频源增加至少部分封闭的空间中的音频广播的可懂度的方法。输入麦克风在至少部分封闭空间中的第一位置处接收入射音频波前。使用主动噪声控制系统来产生具有基本上等于入射音频波阵面的幅度的大小的消除音频波阵面和与入射音频波阵面的相位基本相反的相位。抵消音频波前在与至少部分封闭空间的反射表面相邻的至少部分封闭空间中的第二位置广播，以便基本上在反射表面处或附近衰减入射音频波阵面，以便减少反射表面的混响事件音频波前。以这种方式，可以降低音频广播对听众的清晰度的混响。

2. 发明申请

US20110129096A1 METHOD AND SYSTEM FOR REDUCING ACOUSTICAL REVERBERATIONS IN AN AT LEAST PARTIALLY ENCLOSED SPACE 有权
标题翻译：用于减少最小部分封闭空间的声学反射的方法和系统
公开(公告)号：US20110129096A1
公开(公告)日：2011-06-02
申请号：US12627608
申请日：2009-11-30
申请人： Emmet Raftery
发明人： Emmet Raftery
IPC分类号： H04B3/20 , H04B15/00
CPC分类号： G10K11/178 , G10K2210/12 , G10K2210/505
摘要： A method of increasing the intelligibility of an audio broadcast in an at least partially enclosed space from at least one amplified audio source. An input microphone receives an incident audio wavefront at a first position in the at least partially enclosed space. An active noise control system is employed to generate a cancelling audio wavefront having a magnitude substantially equal to the magnitude of incident audio wavefront and a phase substantially opposite to the phase of the incident audio wavefront. The cancelling audio wavefront is broadcast at a second position in the at least partially enclosed space adjacent to a reflective surface of the at least partially enclosed space so as to attenuate the incident audio wavefront substantially at or near the reflective surface in order to reduce reverberations of the incident audio wavefront. In this manner, reverberations which could reduce the intelligibility of the audio broadcast to an audience is reduced.
摘要翻译：一种从至少一个放大的音频源增加至少部分封闭的空间中的音频广播的可懂度的方法。输入麦克风在至少部分封闭空间中的第一位置处接收入射音频波前。使用主动噪声控制系统来产生具有基本上等于入射音频波阵面的幅度的大小的消除音频波阵面和与入射音频波阵面的相位基本相反的相位。抵消音频波前在与至少部分封闭空间的反射表面相邻的至少部分封闭空间中的第二位置广播，以便基本上在反射表面处或附近衰减入射音频波阵面，以便减少反射表面的混响事件音频波前。以这种方式，可以降低音频广播对听众的清晰度的混响。

3. 发明授权

US08199927B1 Conferencing system implementing echo cancellation and push-to-talk microphone detection using two-stage frequency filter 有权
标题翻译：使用两级频率滤波器实现回声消除和即按即说麦克风检测的会议系统
公开(公告)号：US08199927B1
公开(公告)日：2012-06-12
申请号：US11933366
申请日：2007-10-31
申请人： Emmet Raftery
发明人： Emmet Raftery
IPC分类号： H04B15/02 , H04B3/20 , H04M9/08 , H04B15/00 , H04R27/00 , H04M9/00
CPC分类号： H04M9/082 , H04R27/00 , H04R2227/009
摘要： Disclosed herein are conferencing products implementing an acoustic echo cancellation system that utilizes converging coefficients and a detector of turn-off and/or turn-on events of push-to-talk microphones, and, further, that mitigates against divergence and/or drift of coefficients and other variables of an echo canceller. A push-to-talk detector may be used that includes a high-pass filter, a transient detector, or an adjustable high-pass filter. An echo canceller may be disabled as to a push-to-talk microphone that has been turned off.
摘要翻译：这里公开的是实现使用会聚系数的声学回声消除系统的会议产品以及即按即说麦克风的关断和/或开启事件的检测器，并且进一步减轻了对发散和/或漂移回波消除器的系数和其他变量。可以使用包括高通滤波器，瞬态检测器或可调节高通滤波器的一键通检测器。对于已经关闭的按键通话麦克风可能禁用回声消除器。

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