Electroacoustic devices with noise-reducing capability
    1.
    发明授权
    Electroacoustic devices with noise-reducing capability 有权
    具有降噪能力的电声设备

    公开(公告)号:US07466838B1

    公开(公告)日:2008-12-16

    申请号:US11007397

    申请日:2004-12-08

    IPC分类号: H04R25/00 G10K11/16 H04R1/10

    摘要: New and improved electroacoustic devices each including at least one transducer assembly having one or more microphones typically mounted on a baffle plate and disposed in substantially the same acoustic plane as a speaker or speakers. In the various embodiments, at least one microphone and at least one speaker face the same or opposite directions. Each microphone may be parallel to or oriented at an angle with respect to the speaker. In other embodiments, the speaker includes a central opening or cavity in which a microphone having one of various orientations is provided. The orientations of the microphone or microphones with respect to the speaker or speakers minimize adverse noise reduction effects associated with the differences in sensitivities, frequency responses and phase responses and acoustic time delays between the microphones and the speaker or speakers, as well as minimize sound reflections that are picked up by the microphone or microphones.

    摘要翻译: 新的和改进的电声装置每个包括至少一个具有一个或多个麦克风的换能器组件,通常安装在挡板上并且设置在与扬声器或扬声器基本上相同的声学平面中。 在各种实施例中,至少一个麦克风和至少一个扬声器面向相同或相反的方向。 每个麦克风可以相对于扬声器平行或以一定角度定向。 在其他实施例中,扬声器包括中心开口或空腔,其中提供具有各种取向之一的麦克风。 麦克风或麦克风相对于扬声器或扬声器的取向最小化与麦克风和扬声器或扬声器之间的灵敏度,频率响应和相位响应以及声学时间延迟的差异相关的不利降噪效果,以及最小化声音反射 由麦克风或麦克风拾取。

    Method and apparatus for performing noise cancelling and headphoning
    2.
    发明授权
    Method and apparatus for performing noise cancelling and headphoning 失效
    用于进行噪声消除和头晕的方法和装置

    公开(公告)号:US5138663A

    公开(公告)日:1992-08-11

    申请号:US600185

    申请日:1990-10-19

    摘要: A device for performing electroacoustic functions including noise cancellation, communication interface, and headphone functions. The device includes a composite transducer which is connected to a control unit. The composite transducer, which is adapted for use with the human ear, includes: at least one input transducer for converting acoustic waves into electrical signals, and an output transducer facing the ear for converting electrical signals into acoustic waves. The transducers are oriented to be substantially coplanar to each other. The control unit includes circuitry for driving the output transducer based on electrical signals from the input transducer(s) with an amplitude and phase to perform the noise cancellation, sound filtering, communication interface, and headphone functions. The composite transducer includes a multiple baffle acoustic diffuser which performs frequency filtering, allows sound origin selection, and lengthens the paths of selected sounds entering the composite transducer.

    摘要翻译: 一种用于执行电声功能的设备,包括噪声消除,通信接口和耳机功能。 该装置包括连接到控制单元的复合换能器。 适用于人耳的复合传感器包括:用于将声波转换为电信号的至少一个输入传感器,以及面向耳朵的输出传感器,用于将电信号转换成声波。 换能器被定向为彼此基本共面。 控制单元包括用于基于来自具有幅度和相位的输入换能器的电信号来驱动输出换能器的电路,以执行噪声消除,声音滤波,通信接口和耳机功能。 复合换能器包括执行频率滤波的多挡板声扩散器,允许声源选择,并且延长进入复合换能器的所选声音的路径。

    Electroacoustic device for hearing needs including noise cancellation
    3.
    发明授权
    Electroacoustic device for hearing needs including noise cancellation 失效
    用于听觉需要的电声装置,包括噪声消除

    公开(公告)号:US5001763A

    公开(公告)日:1991-03-19

    申请号:US392264

    申请日:1989-08-10

    IPC分类号: A61F11/14 G10K11/178 H04R1/10

    摘要: A device for performing electroacoustic functions including noise cancellation, hearing aid, communication interface, headset, feed for recording device, and headphone functions. The device includes composite transducers connected to a control unit. The composite transducers can be mounted on a headband and are configured to include input transducers for converting acoustic waves into electrical signals for processing by a control unit, and output transducers for converting the processed electrical signals to processed sound waves. The control unit includes an inverter/amplifier and a mixer/output amplifier for inverting the electrical input and controlling the gain for either adjusting the gain to maximize a noise cancellation function or increasing the gain beyond the minimum level heard by the ear to a desired level for a hearing aid function. Connectors for connecting recorders and a boom microphone, and function selection switches are provided by the control means for connecting circuit components of the control unit selectively for performing the above functions. The input and output transducers have oppositely oriented diaphragms mounted in a common plane to provide an inverted acoustic wave in real time for combining with and substantially cancelling an incoming acoustic wave. 1

    摘要翻译: 一种用于执行电声功能的装置,包括噪声消除,助听器,通信接口,耳机,用于记录装置的馈送和耳机功能。 该装置包括连接到控制单元的复合换能器。 复合换能器可以安装在头带上,并且被配置为包括用于将声波转换成电信号以用于由控制单元处理的输入换能器,以及用于将经处理的电信号转换成经处理的声波的输出换能器。 控制单元包括反相器/放大器和混频器/输出放大器,用于反相电输入并控制增益以调整增益以使噪声消除功能最大化或将超过耳朵所听到的最小电平的增益增加到期望的水平 用于助听器功能。 用于连接记录器和吊杆麦克风的连接器以及功能选择开关由控制装置提供,用于选择性地连接控制单元的电路部件以执行上述功能。 输入和输出传感器具有安装在公共平面中的相对定向的膜片,以实时提供倒置的声波,以与输入声波组合并基本上抵消入射的声波。

    Method and apparatus for performing noise cancelling and headphoning
    4.
    发明授权
    Method and apparatus for performing noise cancelling and headphoning 失效
    用于进行噪声消除和头晕的方法和装置

    公开(公告)号:US5134659A

    公开(公告)日:1992-07-28

    申请号:US558342

    申请日:1990-07-27

    摘要: A device for performing electroacoustic functions including noise cancellation, communication interface, and headphone functions. The device includes a composite transducer which is connected to a control unit. The composite transducer, which is adapted for use with the human ear, includes at least three transducers, oriented to be substantially coplanar to each other: two oppositely oriented input transducers for converting acoustic waves into electrical signals, and at least one output transducer oriented facing the ear for converting electrical signals into acoustic waves. The control unit includes circuitry for driving the output transducer based on electrical signals from the input transducers with an amplitude and phase to perform the noise cancellation, sound filtering, communication interface, and headphone functions. The input transducer which is oriented facing the ear picks up residual noise present in the ear canal which was not cancelled by the first input transducer to output transducer signal path due to non-ideal frequency and amplitude characteristics. The second input transducer supplies an electrical signal corresponding to the residual noise to the control circuitry to cancel the residual noise. Additionally, the path of acoustic energy from a noise source, through the composite transducer, and to the ear canal can be lengthened by the addition of a baffle around which the acoustic energy must travel.

    摘要翻译: 一种用于执行电声功能的设备,包括噪声消除,通信接口和耳机功能。 该装置包括连接到控制单元的复合换能器。 适于与人耳一起使用的复合传感器包括至少三个换向器,其被定向为彼此基本共面:两个相反方向的输入换能器,用于将声波转换成电信号;以及至少一个输出换能器 用于将电信号转换成声波的耳朵。 控制单元包括用于基于具有振幅和相位的输入换能器的电信号驱动输出换能器的电路,以执行噪声消除,声音滤波,通信接口和耳机功能。 面向耳朵的输入传感器拾取耳道中存在的残留噪声,由于非理想的频率和幅度特性,第一输入变换器没有被第一输入变换器取消,从而输出换能器信号路径。 第二输入传感器将对应于残余噪声的电信号提供给控制电路以消除残余噪声。 此外,通过添加声能必须行进的挡板,可以延长来自噪声源,通过复合换能器和耳道的声能的路径。

    Electroacoustic device for hearing needs including noise cancellation
    6.
    发明授权
    Electroacoustic device for hearing needs including noise cancellation 失效
    用于听觉需要的电动装置,包括噪声消除

    公开(公告)号:US5117461A

    公开(公告)日:1992-05-26

    申请号:US532323

    申请日:1990-07-10

    摘要: A device for performing electroacoustic functions including noise cancellation, hearing aid, communication interface, headset, feed for recording device, and headphone functions. The device includes composite transducers connected to a control unit. The composite transducers can be mounted on a headband and are configured to include input transducers for converting acoustic waves into electrical signals for processing by a control unit, and output transducers for converting the processed electrical signals to processed sound waves. The control unit includes an inverter/amplifier and a mixer/output amplifier for inverting the electrical input and controlling the gain for either adjusting the gain to maximize a noise cancellation function or increasing the gain beyond the minimum level heard by the ear to a desired level for a hearing aid function. Connectors for connecting recorders and a boom microphone, and function selection switches are provided by the control means for connecting circuit components of the control unit selectively for performing the above functions. The input and output transducers have oppositely oriented diaphragms mounted in a common plane to provide an inverted acoustic wave in real time for combining with and substantially cancelling an incoming acoustic wave. In this embodiment, an isolation wall means may also be incorporated to prevent sound from the output transducer from propagating back into the input transducer. In a second embodiment, the input and output transducer are both oriented in the same direction toward the user's ear canal.