CN104246870B - 在耳用扬声器通道中的适应性噪音消除(anc)的协调控制 - Google Patents

在耳用扬声器通道中的适应性噪音消除(anc)的协调控制 Download PDF

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CN104246870B
CN104246870B CN201380022422.2A CN201380022422A CN104246870B CN 104246870 B CN104246870 B CN 104246870B CN 201380022422 A CN201380022422 A CN 201380022422A CN 104246870 B CN104246870 B CN 104246870B
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CN104246870A (zh
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J·D·亨德里克斯
杰弗里·奥尔德森
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Cirrus Logic Inc
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Abstract

一种包括耳用扬声器的个人音频设备，包括适应性噪音消除(ANC)电路，其从测量周围音频的至少一个麦克风信号适应性地产生对每个耳用扬声器的抗噪音信号，并且该抗噪音信号与源音频组合来提供对耳用扬声器的输出。该抗噪音信号导致在相应耳用扬声器处的周围音频声音的消除。处理电路使用麦克风信号来产生该抗噪音信号，其可以由适应性滤波器产生。该处理电路控制适应性滤波器的适应以便当检测到在其中一个适应性滤波器的适应上的事件请求动作时，在另一个适应性滤波器上采取动作。ANC系统的另一个特征使用在两个耳用扬声器处提供的麦克风信号来执行在接收用户的语言的语音麦克风信号上的处理。

Description

在耳用扬声器通道中的适应性噪音消除(ANC)的协调控制
技术领域
本发明总体上涉及包括适应性噪音消除(ANC)的个人音频设备，例如耳机，并且更具体地，涉及ANC系统的架构特征，在ANC系统中在通道之间协调用作独立耳用扬声器的ANC系统的控制。
背景技术
无线电话例如移动电话/蜂窝式电话、无绳电话及其他消费性音频设备例如mp3播放器应用广泛。可通过使用麦克风量测周围声事件及随后使用信号处理将抗噪音信号插入至设备的输出中以消除周围声事件提供噪音消除而改进这些设备在清晰度方面的效能。
因为在个人音频设备例如无线电话和耳用扬声器周围的声事件会取决于存在的噪音源和设备它们本身的位置而戏剧性地改变，所以期望调适噪音消除以将这种环境改变考虑进来。
因此，期望提供一种包括在可变声事件中提供噪音消除的耳用扬声器的个人音频系统。
发明内容
提供一种包括在可变声事件中提供噪音消除的耳用扬声器的个人音频系统的上述目标在一种个人音频系统、一种操作方法以及一种集成电路中完成。
个人音频系统包括一对耳用扬声器，每个具有用于重现音频信号的输出变换器，音频信号包括用于回播给听者的源音频和用于抵抗在相应变换器的声输出中的周围音频声音的作用的相应抗噪音信号两者。个人音频设备还包括集成电路以功能性地提供适应性噪音消除(ANC)。所述方法是操作个人音频系统和集成电路的方法。至少一个麦克风提供指示周围音频声音的至少一个麦克风信号。个人音频系统还包括用于从至少一个麦克风信号适应性地产生抗噪音信号的ANC处理电路，以便抗噪音信号导致在相应变换器处的周围音频声音的基本消除。ANC电路还检测什么时候应该在其中一个适应性滤波器的适应上采取动作，以及响应地在另一个适应性滤波器上采取另一个动作。
在另一个特征中，个人音频系统包括两个麦克风，每个麦克风用于每个耳用扬声器。个人音频系统利用两个麦克风的相应一个测量在耳用扬声器处的周围音频，并且产生供应到耳用扬声器的相应变换器的相应抗噪音信号。个人音频系统还测量个人音频系统的用户的近端语言，并且与两个耳用扬声器的每个的输出一致地执行在近端语言上的进一步处理。
如附图所示，可更具体地从本发明的较佳实施例的下列描述中了解本发明的上述及其他目的、特征及优点。
附图说明
图1A为联接到一对耳塞EB1和EB2的无线电话10的视图，其是个人音频系统的示例，本文公开的技术可以在该个人音频系统中实施。
图1B为在图1A中的电信号路径和声信号路径的视图。
图2为在图1A的无线电话10和/或耳塞EB1和EB2内的电路的方框图。
图3为描述在图2的音频集成电路20A、20B的ANC电路30内的信号处理电路和功能模块的方框图。
图4为描述图3的近端语言处理器50的示例性实施例的方框图。
图5为描述在如实施本文公开的ANC系统的集成电路内的信号处理电路和功能模块的方框图。
具体实施方式
公开了噪音消除技术和电路，其可以实施在个人音频设备例如无线电话中。个人音频系统包括一对耳用扬声器，每个具有相应的适应性噪音消除(ANC)通道，其测量周围声环境并且产生被注入到耳用扬声器变换器中以消除周围声事件的信号。麦克风，其可以是一对麦克风—在每个耳用扬声器上有一个，设置来测量周围声环境，其被提供给ANC通道的适应性滤波器以产生被提供给变换器以消除周围音频声音的抗噪音信号。执行ANC通道的控制以便当检测到需要在第一通道的适应性滤波器的适应上作出动作的事件时，也在另一个通道上作出动作。在所公开设备的另一个特征中，由近端语言麦克风测量的近端语言可以根据由设置在耳用扬声器上的一对麦克风获得的周围声音测量值来处理。
图1A表示无线电话10和一对耳塞EB1和EB2，每个附接到听着的相应耳朵5A、5B。图示无线电话10是本文的技术可以在其中实施的设备的一示例，但应该理解不是在无线电话10中或者在后续图解说明中描述的电路中图示的所有元件或配置是必需的。无线电话10通过有线或无线连接例如BLUETOOTHTM连接(BLUETOOTHTM是Bluetooth SIG有限公司的商标)连接到耳塞EB1和EB2。耳塞EB1和EB2每个具有相应的变换器，例如扬声器SPKR1、SPKR2，其重现源音频，包括从无线电话10接收的远端语言，铃声，存储的音频程序材料，以及注入的近端语言(即无线电话10的用户的语言)。源音频还包括要求无线电话10重现的任何其他音频，例如来自由无线电话10接收的网页或其他网络通信的源音频，以及音频指示，例如电量不足和其他系统事件通知。参考麦克风R1、R2设置在相应耳塞EB1和EB2的壳体的表面上用于测量周围声环境。设置另一对麦克风，误差麦克风E1、E2，以便当耳塞EB1、EB2插入到耳朵5A、5B的外部中时，通过提供与由靠近耳朵5A、5B的相应扬声器SPKR1、SPKR2重现的音频组合在一起的周围音频的测量来进一步改进ANC操作。
无线电话10包括适应性噪音消除(ANC)电路和特征，其将抗噪音信号注入到扬声器SPKR1、SPKR2中以提高由扬声器SPKR1、SPKR2重现的远端语言和其他音频的清晰度。在无线电话10内的示例性电路14包括音频集成电路20，其从参考麦克风R1、R2，近端语言麦克风NS，以及误差麦克风E1、E2接收信号，并且与其他集成电路例如包含无线电话收发器的RF集成电路12对接。在其他实施例中，本文公开的电路和技术可以结合在包含用于实施整个个人音频设备的控制电路和其他功能性的单个集成电路中，例如MP3播放器片上集成电路。替代地，ANC电路可以包括在耳塞EB1、EB2的壳体内或者包括在沿着在无线电话10与耳塞EB1、EB2之间的有线连接布置的模块中。为了图解说明之目的，ANC电路将描述为设置在无线电话10内，但上述变形是本领域的技术人员可以理解的，并且可以容易地为这些变形确定在耳塞EB1、EB2，无线电话10以及如果必要第三模块之间的结果信号。近端语言麦克风NS设置在无线电话10的壳体处以捕捉从无线电话10传送给其他通话参与者的近端语言。替代地，近端语言麦克风NS可以设置在耳塞EB1、EB2其中一个的壳体的外表面上，在附接到耳塞EB1、EB2其中一个的话筒上，或者在设置于无线电话10与耳塞EB1、EB2任意一个或两个之间的挂件上。
图1B表示音频集成电路20A、20B的简化示意图，音频集成电路20A、20B包括设置在相应耳塞EB1和EB2内的ANC处理，其在联接到参考麦克风R1、R2时提供由在音频集成电路20A、20B内的ANC处理电路滤波的周围音频声音Ambient1、Ambient2的测量值。音频集成电路20A、20B可以替代地组合到单个集成电路中例如在无线电话10内的集成电路20。音频集成电路20A、20B给它们相应的通道产生输出，其由放大器A1、A2相关一个放大并且其被提供给扬声器SPKR1、SPKR2的相应一个。音频集成电路20A、20B(取决于具体的配置为有线地或无线地)从参考麦克风R1、R2，近端语言麦克风NS，以及误差麦克风E1、E2接收信号。音频集成电路20A、20B还与其他集成电路例如包含如图1A所示的无线电话收发器的RF集成电路12对接。在其他配置中，本文公开的电路和技术可以结合在包含用于实施整个个人音频设备的控制电路和其他功能性的单个集成电路中，例如MP3播放器片上集成电路。替代地，可以使用多个集成电路，例如，当从每个耳塞EB1、EB2到无线电话10设置有无线连接时和/或当在耳塞EB1、EB2内或者沿着将无线电话10连接到耳塞EB1、EB2的线缆布置的模块内执行一些或所有ANC处理时。
一般而言，本文描述的ANC技术测量冲击参考麦克风R1、R2的周围声事件(与扬声器SPKR1、SPKR2和/或近端语言的输出相对)并且还测量冲击在误差麦克风E1、E2上的相同周围声事件。集成电路20A、20B的ANC处理电路单独地调适从相应参考麦克风R1、R2的输出产生的抗噪音信号以具有使在相应误差麦克风E1、E2处的周围声事件的幅度最小的特征。因为声路径P1(z)从参考麦克风R1延伸到误差麦克风E1，所以在音频集成电路20A中的ANC电路主要结合去除电声路径S1(z)的作用来估计声路径P1(z)，其表示音频集成电路20A的音频输出电路和扬声器SPKR1的声/电传输函数的响应。估计的响应包括在特定声环境中在扬声器SPKR1与误差麦克风E1之间的耦合，其受到耳朵5A和其他可能靠近耳塞EB1的物体和人体头部结构的影响。相似地，音频集成电路20B结合去除电声路径S2(z)的作用来估计声路径P2(z)，其表示音频集成电路20B的音频输出电路的响应和扬声器SPKR2的声/电传输函数。
现在参考图2，在耳塞EB1、EB2和无线电话10内的电路表示在方框图中。如图2所示的电路还应用到上面所述的其他配置中，除了当音频集成电路20A、20B设置在无线电话10外部例如在相应耳塞EB1、EB2内时，在CODEC集成电路20与在无线电话10内的其他单元之间发信号由线缆或无线连接来提供。在该配置中，当音频集成电路20设置在无线电话10内时，在单个集成电路20与误差麦克风E1、E2，参考麦克风R1、R2，以及扬声器SPKR1、SPKR2之间的发信号由有线连接或无线连接来提供。在图示的示例中，音频集成电路20A、20B示出为独立的并且是基本上相同的电路，所以下面将仅详细描述音频集成电路20A。
音频集成电路20A包括用于从参考麦克风R1接收参考麦克风信号并且产生参考麦克风信号的数字表示ref的模数转换器(ADC)21A。音频集成电路20A还包括用于从误差麦克风E1接收误差麦克风信号并且产生误差麦克风信号的数字表示err的ADC21B，以及用于从近端语言麦克风NS接收近端语言麦克风信号并且产生近端语言麦克风信号的数字表示ns的ADC21C。(音频集成电路20B经由上面所述的无线连接或有线连接从音频集成电路20A接收近端语言麦克风信号的数字表示ns。)音频集成电路20A从放大器A1产生用于驱动扬声器SPKR1的输出，放大器A1放大数模转换器(DAC)23的输出。DAC23接收组合器26的输出。组合器26将来自内部音频源24的音频信号ia和由ANC电路30产生的抗噪音信号anti-noise组合，它们通过变换具有与在参考麦克风信号ref中的噪音相同的极性，并且因此由组合器26相减。组合器26还组合近端语言信号ns的衰减部分，即侧音信息st，以便无线电话10的用户以与从射频(RF)集成电路22接收的下行链路语言ds成正比关系听到它们自己的声音。近端语言信号ns还提供给RF集成电路22并且作为上行链路语言经由天线ANT发送给服务提供者。
现在参考图3，示出了在图2的音频集成电路20A和20B内的示例性ANC电路30。适应性滤波器32接收参考麦克风信号ref并且在理想的情况下，将它的传递函数W(z)调适为P(z)/S(z)以产生抗噪音信号anti-noise，其被提供给如由图2的组合器26示例的输出组合器，输出组合器将抗噪音信号与准备由扬声器SPKR重现的音频组合。增益方框G1响应于控制信号mute以在如下面进一步详细描述的某些条件下减弱抗噪音信号。适应性滤波器32的系数由W系数控制方框31控制，W系数控制方框31使用两个信号的相关性来判定适应性滤波器32的响应，其通常在最小均方意义上使参考麦克风信号ref存在于误差麦克风信号err中的那些分量之间的误差最小。由W系数控制方框31处理的信号是由滤波器34B提供的路径S(z)的响应(即响应SECOPY(z))的估计的拷贝塑形的参考麦克风信号ref和包括误差麦克风信号err的另一个信号。通过用路径S(z)的响应的估计的拷贝，变换参考麦克风信号ref，响应SECOPY(z)并且在去除误差麦克风信号err归因于源音频的回播的分量之后使误差麦克风信号err最小，适应性滤波器32调适为P(z)/S(z)的期望响应。
除误差麦克风信号err以外，通过W系数控制方框31与滤波器34B的输出一起处理的其他信号包括相反数量的源音频(ds+ia)，其包括由具有响应SE(z)的滤波器34A处理的下行链路语音信号ds和内部音频ia，响应SE(z)的响应SECOPY(z)是一拷贝。通过注入已经由响应SE(z)滤波的相反数量的源音频(ds+ia)，防止适应性滤波器32调适为存在于误差麦克风信号err中的相对大量源音频。通过用路径S(z)的响应的估计变换源音频(ds+ia)的该反拷贝，在处理之前从误差麦克风信号err去除的源音频应与在误差麦克风信号err处重现的源音频(ds+ia)的预期版本匹配。源音频量匹配，因为S(z)的电路径及声路径为源音频(ds+ia)到达误差麦克风E处所采用的路径。滤波器34B本质上不是适应性滤波器，但具有可调响应，其被调适到匹配适应性滤波器34A的响应，以便滤波器34B的响应追踪适应性滤波器34A的调适。为了实施上面所述，适应性滤波器34A具有由SE系数控制方框33控制的系数。适应性滤波器34A处理源音频(ds+ia)以提供表示被递送到误差麦克风E的期望源音频的信号。适应性滤波器34A从而被调适来从源音频(ds+ia)产生一信号，其在从误差麦克风信号err减除时，形成包含误差麦克风信号err非归因于源音频(ds+ia)的含量的误差信号e。组合器36A从误差麦克风信号err去除已过滤源音频(ds+ia)以产生上面所述的误差信号e。
在ANC电路30内，监督控制逻辑38响应于在一个或两个ANC通道中检测到的各种情况来执行各种动作，其通常导致在两个ANC通道上采取动作，如下面将更详细公开。监督控制逻辑38产生多个控制信号，包括控制信号halt W，其暂停W系数控制方框31的调适，控制信号halt SE，其暂停SE系数控制方框33的调适，控制信号W gain，其可以使用来减少或复位响应W(z)的增益，以及控制信号mute，其控制增益方框G1以逐渐减弱抗噪音信号。下面的表1描述可以在图1的无线电话10的环境中发生的一系列周围音频事件或情况，与ANC操作一起出现的问题，以及在检测到特定周围事件或情况时由ANC处理电路采取的响应。
表1
如图3所示，W系数控制方框31提供系数信息给计算方框37，其计算塑形适应性滤波器32的响应的系数Wn(z)的幅度的和∑|Wn(z)|的时间偏导数，其是适应性滤波器32的响应的可变整体增益的表示。在和∑|Wn(z)|中的较大变化表示，机械噪音例如易于由风产生在参考麦克风R1、R2相应一个上的机械噪音，或者在相应耳塞EB1、EB2的壳体上的变化机械接触(例如刮擦)，或者其他情况例如太大并且导致不稳定情况的调适步长，已经使用在系统中。比较器K1将和∑|Wn(z)|的时间偏导数与阈值比较以提供指示值Wind/Scratch给机械噪音情况的监督控制38。在听者的耳朵与耳塞EB1、EB2的相应一个之间的耦合程度可以由耳朵压力估计方框35来估计。耳朵压力估计方框35产生在听者的耳朵与耳塞EB1、EB2的相应一个之间的耦合程度的指示，控制信号Pressure。监督控制38然后可以使用控制信号Pressure来确定什么时候暂停两个通道的W(z)的调适，以及减少在耳塞EB1、EB2的相对一个中的W(z)的增益。可以使用来实施耳朵压力估计方框35的用于确定在听者的耳朵与无线电话10之间的耦合程度的技术公开在名称为“EAR-COUPLING DETECTION AND ADJUSTMENTOF ADAPTIVE RESPONSE IN NOISE-CANCELING IN PERSONAL AUDIO DEVICES(在个人音频设备中的噪音消除中的耳朵耦合检测和适应性响应调节)”的美国专利申请公开号No.US20120207317A1中，其公开在此通过参考并入本文。适应性滤波器32还提供指示clip，其指示由适应性滤波器32产生的数字值已经削波，或者什么时候期望在代表抗噪音的后续模拟或数字信号中发生削波。响应于指示clip的断定，监督控制采取动作例如在表1中指示的那些动作并且根据一个示例性实施例，在与在其中断定指示clip的通道相对的通道上较长时间周期地采取动作，以便确保导致削波的周围情况已经结束。连接信号link提供在对应于耳塞EB1、EB2的每个通道的ANC电路30之间，以便当监督控制38检测到需要作用到适应性滤波器32的调适上的动作以及其他动作例如减弱抗噪音信号的情况时，可以是与上述提及的动作不同的恰当动作也可以被采用到相对通道上。
参考图4，示出了可以包括在图3的ANC电路30内的近端语言处理器50的细节。如图所示，近端语言处理器50仅是在两个参考麦克风信号ref1和ref2可从相应耳塞EB1、EB2获得并且语言在提供近端语言麦克风信号ns的第三近端语言麦克风NS处接收时被执行的这种类型处理的简化示例。在图示的示例中，每个参考麦克风信号ref1、ref2和近端语言麦克风信号ns提供给相应低通滤波器52A－52C，其去除高频分量，因为高频分量，在参考麦克风信号ref1、ref2和近端语言麦克风信号ns之间的相位由于在相应麦克风之间的物理距离而会是不确定的。已滤波参考麦克风信号和近端语言麦克风信号由构成波束生成器的组合器53求和，因为图1的参考麦克风R1、R2大体上是与近端语言源(听者的嘴)等距离的，所以对参考麦克风信号ref1、ref2求和将趋于消除来自除了直接在参考麦克风R1、R2之间指向的方向的声音。滤波器52C的相位响应可能需要相对于滤波器52A和52B调节，以便匹配由参考麦克风信号ref1、ref2形成的波束的相位和近端语言麦克风信号ns的相位。组合器53的输出可以使用为增强的近端语言输出信号nsout，其具有相对于周围噪音的增大幅度。近端语言处理器50的另一个特征使用增强的近端语言输出信号nsout来提高语音活性检测(VAD)。近端语言输出信号ns的水平由检测器54检测，其提供到VAD逻辑方框56的输入，以便区分语音活性什么时候充足能量地存在于周围声音上。
现在参考图5，ANC系统的方框图示出了用于实施如图3所述的ANC技术，并且具有如可以在图2的音频集成电路20A、20B内实施的处理电路40，其图示为组合在一个电路内，但可以实施为内部互连通信的两个或更多个处理电路。处理电路40包括联接到存储器44的处理器核42，在存储器44中存储有程序指令，包括计算机编程产品，其可以实施上面所述ANC技术的一些或全部，以及其他信号处理。可选地，专用数字信号处理(DSP)逻辑46可以提供来实施由处理电路40提供的ANC信号处理的一部分，或替代地全部。处理电路40还包括ADC21A－21E，分别用于接收参考麦克风R1、误差麦克风E1、近端语言麦克风NS、参考麦克风R2以及误差麦克风E2的输入。在其中参考麦克风R1、误差麦克风E1、近端语言麦克风NS、参考麦克风R2以及误差麦克风E2的一个或多个具有数字输出或作为数字信号与远程ADC通信的替代实施例中，ADC21A－21E的相应ADC省略并且数字麦克风信号直接对接到处理电路40。DAC23A和放大器A1也由处理电路40提供用于给扬声器SPKR1提供扬声器输出信号，包括如上所述的抗噪音。相似地，DAC23B和放大器A2给扬声器SPKR2提供另一个扬声器输出信号。扬声器输出信号可以是数字输出信号，用于提供给声学地重现数字输出信号的模块。
虽然已特别参考本发明的优选实施例展示及描述本发明，但是本领域的技术人员理解可在不脱离本发明的精神及范围的情况下在其中作出上述及其他形式及细节的改变。

Claims (25)

1.一种个人音频系统，包括：
第一耳用扬声器，用于重现第一音频信号，第一音频信号包括用于回播给听者的第一源音频和用于抵抗在第一耳用扬声器的声输出中的周围音频声音的作用的第一抗噪音信号两者；
第二耳用扬声器，用于重现第二音频信号，第二音频信号包括用于回播给听者的第二源音频和用于抵抗在第二耳用扬声器的声输出中的周围音频声音的作用的第二抗噪音信号两者；
至少一个麦克风，用于提供指示周围音频声音的至少一个麦克风信号；以及
处理电路，其利用第一适应性滤波器从至少一个麦克风信号产生第一抗噪音信号以与所述至少一个麦克风信号一致地减少周围音频声音在第一耳用扬声器处的存在，其中该处理电路利用第二适应性滤波器从至少一个麦克风信号产生第二抗噪音信号以与所述至少一个麦克风信号一致地减少周围音频声音在第二耳用扬声器处的存在，其中所述处理电路确定在第一耳用扬声器与听者的耳朵之间的第一耦合程度并且确定在第二耳用扬声器与听者的另一耳朵之间的第二耦合程度，并且其中所述处理电路响应于检测到第一耦合程度指示第一耳用扬声器松弛地连接到听者的耳朵或检测到所述第二耦合程度指示所述第二耳用扬声器松弛地连接到听者的耳朵，暂停所述第一适应性滤波器和所述第二适应性滤波器的系数的更新，而继续产生所述第一抗噪音信号和所述第二抗噪音信号。
2.根据权利要求1所述的个人音频系统，其中所述至少一个麦克风包括安装在第一耳用扬声器的壳体上的第一麦克风和安装在第二耳用扬声器的壳体上的第二麦克风，其中所述处理电路从第一麦克风产生第一抗噪音信号，并且其中所述处理电路从第二麦克风产生第二抗噪音信号。
3.根据权利要求1所述的个人音频系统，其中所述处理电路还响应于检测到第一耦合程度指示第一耳用扬声器松弛地连接到听者的耳朵，进一步减少第二适应性滤波器的响应的增益。
4.根据权利要求1所述的个人音频系统，其中所述处理电路检测在包括第一适应性滤波器的第一音频路径中和包括第二适应性滤波器的第二音频路径中的削波，并且其中所述处理电路响应于检测到在第一音频路径或第二音频路径任意一个中的削波，在第一适应性滤波器和第二适应性滤波器两者的调适上采取动作。
5.根据权利要求4所述的个人音频系统，其中所述处理电路响应于在第一音频路径中检测到削波，在第二适应性滤波器上采取动作的时间周期比在第一适应性滤波器上采取动作的时间周期更长。
6.根据权利要求1所述的个人音频系统，其中所述处理电路检测到达第一麦克风的周围音频声音已经超过预定幅度阈值，并且响应于检测到周围音频声音已经超过预定幅度阈值，所述处理电路暂停第一适应性滤波器和第二适应性滤波器两者的调适。
7.根据权利要求1所述的个人音频系统，所述其中处理电路检测到在第一耳用扬声器的第一壳体上的刮擦或在第一耳用扬声器处的风噪音，并且没有检测到在第二耳用扬声器的第二壳体上的刮擦或在第二耳用扬声器处的风噪音，并且响应于检测到在第一耳用扬声器的第一壳体上的刮擦或在第一耳用扬声器处的风噪音，减弱第一抗噪音信号以及暂停第一适应性滤波器的调适并且不减弱第二抗噪音信号。
8.根据权利要求7所述的个人音频系统，其中所述处理电路响应于检测到在第一耳用扬声器的第一壳体上的刮擦或在第一耳用扬声器处的风噪音，减少第二适应性滤波器的增益。
9.一种用个人音频系统抵抗周围音频声音的作用的方法，所述方法包括：
利用第一适应性滤波器从至少一个麦克风信号首先产生第一抗噪音信号以与所述至少一个麦克风信号一致地减少周围音频声音在第一耳用扬声器处的存在；
利用第二适应性滤波器从至少一个麦克风信号其次产生第二抗噪音信号以与所述至少一个麦克风信号一致地减少周围音频声音在第二耳用扬声器处的存在；
确定在第一耳用扬声器与听者耳朵之间的第一耦合程度；
确定在第二耳用扬声器与听者耳朵之间的第二耦合程度以及
响应于检测到第一耦合程度指示第一耳用扬声器松弛地连接到听者的耳朵或检测到所述第二耦合程度指示所述第二耳用扬声器松弛地连接到听者的耳朵，暂停所述第一适应性滤波器和所述第二适应性滤波器的系数的更新，而继续所述首先产生和其次产生；
响应于检测到请求在第一适应性滤波器的调适上采取动作的事件，采取动作到第二适应性滤波器的调适上。
10.根据权利要求9所述的方法，其中至少一个麦克风包括安装在第一耳用扬声器的壳体上的第一麦克风和安装在第二耳用扬声器的壳体上的第二麦克风，其中所述首先产生从第一麦克风产生第一抗噪音信号，并且其中所述其次产生从第二麦克风产生第二抗噪音信号。
11.根据权利要求10所述的方法，其中所述采取动作还包括响应于检测到第一耦合程度指示第一耳用扬声器松弛地连接到听者的耳朵，减少第二适应性滤波器的响应的增益。
12.根据权利要求9所述的方法，还包括检测在包括第一适应性滤波器的第一音频路径中和包括第二适应性滤波器的第二音频路径中的削波，并且还包括响应于检测到在第一音频路径或第二音频路径任意一个中的削波，在第一适应性滤波器和第二适应性滤波器两者的调适上采取动作。
13.根据权利要求12所述的方法，其中响应于在第一音频路径中检测到削波，所述暂停所述第二适应性滤波器的系数的更新的持续时间比暂停所述第二适应性滤波器的系数的更新的持续时间长。
14.根据权利要求9所述的方法，其中所述检测检测到达第一麦克风的周围音频声音已经超过预定幅度阈值，并且还包括响应于检测到周围音频声音已经超过预定幅度阈值，暂停第一适应性滤波器和第二适应性滤波器两者的调适。
15.根据权利要求9所述的方法，还包括检测到在第一耳用扬声器的第一壳体上的刮擦或在第一耳用扬声器处的风噪音，并且没有检测到在第二耳用扬声器的第二壳体上的刮擦或在第二耳用扬声器处的风噪音，并且还包括响应于检测到在第一耳用扬声器的第一壳体上的刮擦或在第一耳用扬声器处的风噪音，减弱第一抗噪音信号以及暂停第一适应性滤波器的调适并且不减弱第二抗噪音信号。
16.根据权利要求15所述的方法，还包括响应于检测到在第一耳用扬声器的第一壳体上的刮擦或在第一耳用扬声器处的风噪音，减少第二适应性滤波器的增益。
17.一种用于实施个人音频系统的至少一部分的集成电路，包括：
第一输出，用于给第一耳用扬声器提供第一输出信号，其包括用于回播给听者的第一源音频和用于抵抗在第一耳用扬声器的第一声输出中的周围音频声音的作用的第一抗噪音信号两者；
第二输出，用于给第二耳用扬声器提供第二输出信号，其包括用于回播给听者的第二源音频和用于抵抗在第二耳用扬声器的声输出中的周围音频声音的作用的第二抗噪音信号两者；
至少一个麦克风输入，用于接收指示周围音频声音的至少一个麦克风信号；以及
处理电路，其利用第一适应性滤波器从至少一个麦克风信号产生第一抗噪音信号以与所述至少一个麦克风信号一致地减少周围音频声音在第一耳用扬声器处的存在，其中该处理电路利用第二适应性滤波器从至少一个麦克风信号产生第二抗噪音信号以与所述至少一个麦克风信号一致地减少周围音频声音在第二耳用扬声器处的存在，其中该处理电路确定在第一耳用扬声器与听者的耳朵之间的第一耦合程度并且确定在第二耳用扬声器与听者的另一耳朵之间的第二耦合程度，并且其中所述处理电路响应于检测到第一耦合程度指示第一耳用扬声器松弛地连接到听者的耳朵或检测到所述第二耦合程度指示所述第二耳用扬声器松弛地连接到听者的耳朵，暂停所述第一适应性滤波器和所述第二适应性滤波器的系数的更新，而继续产生所述第一抗噪音信号和所述第二抗噪音信号。
18.根据权利要求17所述的集成电路，其中所述至少一个麦克风信号包括从安装在第一耳用扬声器的壳体上的第一麦克风提供的第一麦克风信号和从安装在第二耳用扬声器的壳体上的第二麦克风提供的第二麦克风信号，其中所述处理电路从第一麦克风信号产生第一抗噪音信号，并且其中所述处理电路从第二麦克风信号产生第二抗噪音信号。
19.根据权利要求18所述的集成电路，其中所述处理电路确定在第一耳用扬声器与听者的耳朵之间的第一耦合程度并且确定在第二耳用扬声器与听者的另一个耳朵之间的第二耦合程度，并且其中所述处理电路响应于检测到第一耦合程度指示第一耳用扬声器松弛地连接到听者的耳朵，暂停第二适应性滤波器的调适。
20.根据权利要求17所述的集成电路，其中所述处理电路还响应于检测到第一耦合程度指示第一耳用扬声器松弛地连接到听者的耳朵，进一步减少第二适应性滤波器的响应的增益。
21.根据权利要求17所述的集成电路，其中所述处理电路检测在包括第一适应性滤波器的第一音频路径中和包括第二适应性滤波器的第二音频路径中的削波，并且其中所述处理电路响应于检测到在第一音频路径或第二音频路径任意一个中的削波，在第一适应性滤波器和第二适应性滤波器两者的调适上采取动作。
22.根据权利要求21所述的集成电路，其中所述处理电路响应于在第一音频路径中检测到削波，在第二适应性滤波器上采取动作的时间周期比在第一适应性滤波器上采取动作的时间周期更长。
23.根据权利要求17所述的集成电路，其中所述处理电路检测到达第一麦克风的周围音频声音已经超过预定幅度阈值，并且响应于检测到周围音频声音已经超过预定幅度阈值，所述处理电路暂停第一适应性滤波器和第二适应性滤波器两者的调适。
24.根据权利要求17所述的集成电路，其中所述至少一个麦克风信号包括从安装在第一耳用扬声器的壳体上的第一麦克风提供的第一麦克风信号和从安装在第二耳用扬声器的壳体上的第二麦克风提供的第二麦克风信号，其中所述处理电路检测到在第一麦克风信号中的刮擦或风噪音，并且没有检测到在第二麦克风信号中的刮擦或风噪音，并且响应于检测到在第一麦克风信号中的刮擦或风噪音，减弱第一抗噪音信号以及暂停第一适应性滤波器的调适并且不减弱第二抗噪音信号。
25.根据权利要求24所述的集成电路，其中所述处理电路响应于检测到在第一麦克风信号中的刮擦或风噪音，减少第二适应性滤波器的增益。
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