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1. 发明申请

WO1995000947A1 REDUCED VLF OVERLOAD SUSCEPTIBILITY ACTIVE NOISE CANCELLATION HEADSET 审中-公开
标题翻译：减少VLF过载可靠性主动噪声消除头
公开(公告)号：WO1995000947A1
公开(公告)日：1995-01-05
申请号：PCT/US1994007058
申请日：1994-06-22
申请人： ACTIVE NOISE AND VIBRATION TECHNOLOGIES, INC.
发明人： ACTIVE NOISE AND VIBRATION TECHNOLOGIES, INC. , JONES, Owen
IPC分类号： G10K11/16
CPC分类号： G10K11/178 , G10K2210/1081 , G10K2210/3028 , G10K2210/3039 , G10K2210/3045
摘要： The susceptibility of an active noise cancellation system to overloading due to very low frequencies is reduced by subtracting the low frequency components of an applied noise field from the residual signal. Low frequency components of the applied noise field outside the normal range of human hearing are detected by an external sensor (14) and isolated by a filter circuit (15). The isolated low frequency signal is subtracted from the residual signal, resulting in a modified residual signal with reduced low frequency components. The cancellation system thus eliminates very low frequency cancellation signals, without sacrificing bandwidth or system performance within the audible range.
摘要翻译：通过从残余信号中减去所施加的噪声场的低频分量，减少了由于极低频率而导致的主动噪声消除系统对过载的敏感性。通过外部传感器（14）检测出由人体听觉正常范围以外的施加噪声场的低频分量，并由滤波器电路（15）隔离。从残留信号中减去隔离的低频信号，导致修改后的残差信号具有降低的低频分量。因此，消除系统消除了非常低的频率消除信号，而不会在可听范围内牺牲带宽或系统性能。

2. 发明申请

WO1994023420A1 HYBRID ANALOG/DIGITAL VIBRATION CONTROL SYSTEM 审中-公开
标题翻译：混合模拟/数字振动控制系统
公开(公告)号：WO1994023420A1
公开(公告)日：1994-10-13
申请号：PCT/US1994003853
申请日：1994-04-07
申请人： ACTIVE NOISE AND VIBRATION TECHNOLOGIES, INC.
发明人： ACTIVE NOISE AND VIBRATION TECHNOLOGIES, INC. , GIFFORD, Carl, S. , JONES, Owen , TRINDER, Michael, Charles, John
IPC分类号： G10K11/16
CPC分类号： F16F15/002 , F16F13/26 , F16F15/02 , G10K11/178 , G10K2210/121 , G10K2210/1282 , G10K2210/129 , G10K2210/1291 , G10K2210/3013 , G10K2210/30232 , G10K2210/3026 , G10K2210/3027 , G10K2210/3032 , G10K2210/3037 , G10K2210/3042 , G10K2210/3045 , G10K2210/3211 , G10K2210/3213 , G10K2210/501 , G10K2210/503 , G10K2210/511
摘要： A vibration control system includes a processor-based circuit which monitors and controls an analog vibration control circuit. The system includes a sensor to detect the undesirable vibrations and a synchronous pulse generator for determining the fundamental frequency of the vibrations emitted by the source. An actuator produces anti-noise to counter unwanted vibrations. The processor circuit tests the system, monitors system functions, and adjusts various parameters to provide optimal performance.
摘要翻译：振动控制系统包括监视和控制模拟振动控制电路的基于处理器的电路。该系统包括用于检测不期望的振动的传感器和用于确定由该源发出的振动的基频的同步脉冲发生器。执行器产生抗噪声以防止不必要的振动。处理器电路测试系统，监控系统功能，并调整各种参数以提供最佳性能。

3. 发明申请

WO1995000946A1 VARIABLE GAIN ACTIVE NOISE CANCELLATION SYSTEM WITH IMPROVED RESIDUAL NOISE SENSING 审中-公开
标题翻译：可变增益主动噪声消除系统具有改进的残留噪声感知
公开(公告)号：WO1995000946A1
公开(公告)日：1995-01-05
申请号：PCT/US1994007027
申请日：1994-06-23
申请人： ACTIVE NOISE AND VIBRATION TECHNOLOGIES, INC.
发明人： ACTIVE NOISE AND VIBRATION TECHNOLOGIES, INC. , JONES, Owen
IPC分类号： G10K11/16
CPC分类号： G10K11/17857 , A61F2011/145 , G10K11/17855 , G10K11/17881 , G10K11/17885 , G10K2210/108 , G10K2210/1081 , G10K2210/3011 , G10K2210/3013 , G10K2210/3019 , G10K2210/3028 , G10K2210/3056 , G10K2210/3214 , G10K2210/503
摘要： An active noise cancellation system includes a series of features for more effective cancellation, greater reliability, and improved stability. A particular feature adapted for headset systems includes locating a residual microphone radially offset from the center of a sound generator to detect a signal more similar to that incident upon the eardrum of the user. In addition, an open back headset design includes perforations on the side of the headset instead of the back, so that the perforations are less susceptible to inadvertent blockage. The system also includes a mecchanism for detecting changes in the acoustic characteristics of the environment that may be caused, for example, by pressure exerted upon the earpieces, and that may destabilize the cancellation system. The system automatically responds to such changes, for example, by reducing the gain or the frequency response of the system to preserve stability. The system further includes other methods for detecting imminent instability and compensating, such as detecting the onset of signals within enhancement frequencies characteristic of the onset of instability, and adjusting the gain or frequency response of the system or suppressing the enhanced signals. The system further includes a mecchanism for conserving batteryl ife by turning the system off when sound levels are low, or adjusting the power supply to the system to correspond to the current power requirements of the system.
摘要翻译：主动噪声消除系统包括一系列功能，用于更有效的消除，更高的可靠性和更好的稳定性。适用于耳机系统的特定特征包括将距离声发生器中心径向偏移的剩余麦克风定位成检测更类似于在用户鼓膜上入射的信号的信号。此外，开放式耳机设计包括耳机侧面的穿孔而不是背部，使得穿孔不易受到意外的堵塞。该系统还包括用于检测例如通过施加在听筒上的压力可能引起的环境的声学特性的变化的机构，并且可能使取消系统不稳定。系统自动响应这种变化，例如，通过减小系统的增益或频率响应来保持稳定性。该系统还包括用于检测即将发生的不稳定性和补偿的其它方法，例如检测不稳定性开始特征的增强频率内的信号的开始，以及调整系统的增益或频率响应或抑制增强的信号。该系统还包括通过在声级较低时关闭系统来保护电池，或者调整系统的电源以对应于系统的当前功率需求的机构。

4. 发明申请

WO1994017513A1 EARPIECE FOR ACTIVE NOISE CANCELLING HEADSET 审中-公开
标题翻译：主动噪声消除头戴耳机
公开(公告)号：WO1994017513A1
公开(公告)日：1994-08-04
申请号：PCT/US1994000849
申请日：1994-01-28
申请人： ACTIVE NOISE AND VIBRATION TECHNOLOGIES, INC.
发明人： ACTIVE NOISE AND VIBRATION TECHNOLOGIES, INC. , JONES, Owen
IPC分类号： G10K11/16
CPC分类号： H04R1/1083 , A61F2011/145 , G10K11/178 , G10K2210/106 , G10K2210/1081 , G10K2210/3224 , G10K2210/509 , H04M1/19 , H04R1/1008 , H04R5/033
摘要： An earpiece (1) for active noise cancellation is disclosed. A headset embodying the earpiece, and a handset of a conventional telephone embodying the earpiece are also disclosed. The earpiece includes an outer shell (4); a baffle (6) including a compliant seal (7) for extending across the inside of the shell to define a closed volume (1a) therein; and a sound producer (8) such as a speaker mounted on the baffle for directing anti-noise sound towards the user's ear.
摘要翻译：公开了一种用于主动噪声消除的耳机（1）。还公开了体现耳机的耳机和体现耳机的传统电话的手机。听筒包括外壳（4）; 包括柔性密封件（7）的挡板（6），用于在壳体的内部延伸以在其中限定封闭的容积（1a）; 以及声音产生器（8），例如安装在挡板上的扬声器，用于将抗噪声声音引导到用户的耳朵。

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