CN101432798A - 利用主动降噪的头戴式耳机的通信 - Google Patents

利用主动降噪的头戴式耳机的通信 Download PDF

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CN101432798A
CN101432798A CNA2007800148914A CN200780014891A CN101432798A CN 101432798 A CN101432798 A CN 101432798A CN A2007800148914 A CNA2007800148914 A CN A2007800148914A CN 200780014891 A CN200780014891 A CN 200780014891A CN 101432798 A CN101432798 A CN 101432798A
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A·G·伯斯
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    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
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    • G10K11/17857—Geometric disposition, e.g. placement of microphones
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    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
    • G10K11/1781—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions
    • G10K11/17821—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions characterised by the analysis of the input signals only
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    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
    • G10K11/1787—General system configurations
    • G10K11/17873—General system configurations using a reference signal without an error signal, e.g. pure feedforward
    • G—PHYSICS
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    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
    • G10K11/1787—General system configurations
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    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
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    • G10K11/17885—General system configurations additionally using a desired external signal, e.g. pass-through audio such as music or speech
    • G—PHYSICS
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    • G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
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    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/10—Applications
    • G10K2210/108—Communication systems, e.g. where useful sound is kept and noise is cancelled
    • G10K2210/1081—Earphones, e.g. for telephones, ear protectors or headsets

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Abstract

主动降噪的头戴式受话器具有：在降噪电路中的降噪麦克风(11)、外部麦克风、信号输入端(24)和外部麦克风(41)输出端(S1B)以及用于选择性地将该头戴式受话器耦合到信号输入(S1A)和麦克风输出端(S1B)之一的开关(SI)。

Description

利用主动降噪的头戴式耳机的通信
技术领域
本发明一般涉及利用主动降噪的头戴式耳机进行通信，并且特别地涉及使用主动降噪的头戴式耳机的新颖的装置和技术，该主动降噪的头戴式耳机具有可在用于接收外部电信号的连接器与用于转换头戴式耳机外部的语音的麦克风之间选择性地连接的头戴式受话器。
背景技术
作为背景技术，参考了2005年9月29日公开的US 2005/021377 A1的第〔002〕段阐述的信息，在2004年6月15日提交的未决美国申请No.10/868,318，现于2005年12月15日公开为US 2005/0276421 A1，以及在1996年3月12日公开的日本未审专利申请公开No.H8-70493，在此通过引用的方式包含其全部内容。
发明内容
根据本发明，主动降噪的头戴式耳机具有在用于接收外部电信号的连接器与用于转换头戴式耳机外部的语音的麦克风之间选择性地连接的头戴式受话器。
通过结合附图阅读以下详细描述，本发明的其它特征、目的和优点将变得明显。
附图说明
图1是根据本发明的系统的逻辑配置的框图；
图2示出在接收外部语音的每个头戴式受话器上具有麦克风的头戴式耳机；以及
图3是使用前向反馈主动降噪的本发明的一个实施例的框图。
具体实施方式
参考附图并且更为具体地参考其中的图1，示出了说明根据本发明的系统的逻辑配置的框图。在这个实施例中，信号合并器30用代数方式合并期望由头戴式受话器在输入端24上重现的信号和由内部麦克风前置放大器35所提供的反馈信号，其中输入端24连接到如图所示连接的开关S1的开关端子S1A。信号合并器30提供已合并的信号给压缩器31，其限制高电平信号的电平。压缩器31的输出被施加到补偿器31A。补偿器31A包括补偿电路，用以确保开环增益满足奈奎斯特稳定性标准，从而系统在闭环时不会振荡。所示出的系统针对左边和右边耳朵各复制一次。
功率放大器32放大来自补偿器31A的信号，并且激励头戴式受话器驱动器17以在腔12中提供声信号，其与从表示为声音输入端25的区域进入腔12的外部噪音信号相合并，从而在腔12中产生合并的声压信号(这被表示为圆圈36)，该合并的声压信号被施加到内部麦克风11并由内部麦克风11进行转换。内部麦克风前置放大器35放大经转换的信号，并将其递送到信号合并器30。
通过将开关S1连接到端子S1B，来自通过外部麦克风前置放大器42(优选地，具有被限制在语音频谱的带通滤波器)而耦合的外部麦克风41的经转换的信号被递送给信号合并器30。
当与诸如
Figure A200780014891D00051
QuietComfort Acoustic Noise
Figure A200780014891D0005100004QIETU
的具有附加的麦克风的头戴式受话器之类的主动降噪的头戴式耳机一起使用时，本发明具有许多优点。诸如飞机乘客之类的佩戴者可切换开关S1以接收航班乘务员的经转换的语音信号，例如其因为主动降噪的好处而被清晰地听到。切换开关以连接到端子S1A，从而允许用户收听输入端24上的电音频信号，诸如音乐或电影的声道，或者可选地，不施加任何信号，从而在诸如飞机之类的吵杂环境中享受极大地降噪后的宁静。
参考图2，示出被连到诸如43和44的头戴式受话器帽的诸如41和41’的外部麦克风的图示。
参考图3，示出通过外部前向反馈麦克风11’来使用反馈的本发明的一个实施例的方框示意图，该外部前向反馈麦克风11’通过反相放大器51和滤波器52而耦合，滤波器52通常选择性地传输预先确定的音频带宽内的频谱分量以实现在该带宽内降低噪音。滤波器52的输出被耦合到合并器36’的一个输入。合并器36’的另一个输入被耦合到开关S1”的臂，开关S1”选择性地接收端子S1A”上的音频输入信号或接收端子S1B”上由外部麦克风41”所转换的放大的声音信号。合并器36’的输出被耦合到功率放大器32’，其驱动头戴式受话器驱动器17’。前向反馈麦克风11’总是被耦合到合并器36’的输入以实现主动降低噪音。
已经描述了用于改善吵杂环境中的通信的新颖的装置和技术。显然，本领域的普通技术人员在不偏离本发明概念的条件下，可以对在此所公开的特定装置和技术进行许多应用和修改并且可以与在此所公开的特定装置和技术有所不同。因此，本发明应该被理解成包括此处所公开的装置和技术所提出或拥有的每一个新颖特征和新颖的特征组合，本发明仅仅受限于所附权利要求书的精神和范围。

Claims (5)

1.通信装置，其包括，
降噪的头戴式受话器，
输入端，其用于接收电输入信号，
外部麦克风，其附接到所述头戴式受话器，被构建和安排成用于通过限制在语音频谱的带通滤波器将所述头戴式受话器外部的信号电声地转换成对应的电语音信号，
开关，其耦合到所述头戴式受话器，所述开关具有耦合到所述输入端的第一端子和耦合到所述外部麦克风的第二端子，其被构建和安排成用于选择性地将所述头戴式受话器耦合到所述第一端子和所述第二端子中的仅仅一个，以及
降噪麦克风，其用于将不期望的声信号电声地转换成对应的不期望的声电信号，
合并器，其被构建和安排成用于合并所述第一端子和第二端子中已被所述开关选择的那个端子上的期望信号与所述不期望的声电信号以提供经合并的信号，以及
功率放大器，其将所述经合并的信号耦合到所述头戴式受话器，以减少所述头戴式受话器的用户对所述不期望的声信号的可听度。
2.根据权利要求1所述的通信装置，其中所述降噪麦克风处于所述头戴式受话器的内部并且包括负反馈电路，被构建和安排成用于减少所述头戴式受话器的用户对所述不期望的声信号的可听度。
3.根据权利要求1所述的通信装置，其中所述降噪麦克风处于所述头戴式受话器的外部并且包括前向反馈电路，被构建和安排成用于减少所述头戴式受话器的用户对所述不期望的声信号的可听度。
4.根据权利要求1所述的通信装置，并且进一步包括第二头戴式受话器，其中所述开关被耦合到所述两个头戴式受话器以选择性地将所述头戴式受话器耦合到所述第一端子和所述第二端子中的仅仅一个。
5.根据权利要求4所述的通信装置，并且进一步包括被附接到所述第二头戴式受话器的第二外部麦克风，被构建和安排成用于通过限制在语音频谱的第二带通滤波器将所述第二头戴式受话器外部的信号电声地转换成对应的电语音信号。
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