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    • 1. 发明授权
    • Acoustic conditioner
    • 声学调理器
    • US06442279B1
    • 2002-08-27
    • US09687799
    • 2000-10-13
    • David A. PrevesRobert L. MillierLawrence T. HagenNing Shen
    • David A. PrevesRobert L. MillierLawrence T. HagenNing Shen
    • H03G700
    • H04R25/502H04R25/356
    • An acoustic conditioning apparatus. The mechanism includes an attenuator to limit excessive noise levels. The attenuator includes a circuit for compressing an output sound pressure level below a desired level, such as 90 dBA over an eight-hour period. The mechanism also includes an amplifier for conditioning ambient sound level in accordance with the normal needs of a hearing impaired person using the conditioning apparatus. Additionally included is a switch in an electrical circuit to enable selection of attenuation of excessive noise levels or normal amplification. The switch can be controlled either manually by means of a toggle on a housing enclosing the various components, or automatically in response to the sensed noise level.
    • 声音调节装置。 该机构包括一个衰减器以限制过高的噪音水平。 衰减器包括用于将输出声压级压缩到低于期望水平的电路,例如在八小时内的90dBA。 该机构还包括用于根据使用调节装置的听障人士的正常需要来调节环境声级的放大器。 另外包括电路中的开关,以便能够选择过大噪声电平或正常放大的衰减。 可以通过在包围各种部件的外壳上的肘节手动地控制开关,或者响应于感测到的噪声水平而自动地控制开关。
    • 2. 发明授权
    • Acoustics conditioner
    • 声学护发素
    • US06359992B1
    • 2002-03-19
    • US08795545
    • 1997-02-06
    • David A. PrevesRobert L. MillierLawrence T. HagenNing Shen
    • David A. PrevesRobert L. MillierLawrence T. HagenNing Shen
    • H04R2500
    • H04R25/502H04R25/356
    • An acoustic conditioning apparatus. The mechanism includes an attenuator to limit excessive noise levels. The attenuator includes a circuit for compressing an output sound pressure level below a desired level, such as 90 dBA over an eight-hour period. The mechanism also includes an amplifier for conditioning ambient sound level in accordance with the normal needs of a hearing impaired person using the conditioning apparatus. Additionally included is a switch in an electrical circuit to enable selection of attenuation of excessive noise levels or normal amplification. The switch can be controlled either manually by means of a toggle on a housing enclosing the various components, or automatically in response to the sensed noise level.
    • 声音调节装置。 该机构包括一个衰减器以限制过高的噪音水平。 衰减器包括用于将输出声压级压缩到低于期望水平的电路,例如在八小时内的90dBA。 该机构还包括用于根据使用调节装置的听障人士的正常需要来调节环境声级的放大器。 另外包括电路中的开关,以便能够选择过大噪声电平或正常放大的衰减。 可以通过在包围各种部件的外壳上的肘节手动地控制开关,或者响应于感测到的噪声水平而自动地控制开关。