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1. 发明授权

US06798887B1 Key click masker and method for masking key clicks 失效
标题翻译：主要点击掩码和屏蔽关键点击的方法
公开(公告)号：US06798887B1
公开(公告)日：2004-09-28
申请号：US09344049
申请日：1999-06-25
申请人： Robert Floyd Andre
发明人： Robert Floyd Andre
IPC分类号： H04R302
CPC分类号： G06F21/83 , G06F3/16
摘要： A key click masker and method for disguising key clicks protect sensitive information by randomly varying key click echo generated by a computer system. The key click masker and method disguise the actual keystrokes by generating sounds that would confuse a listener trying to determine the actual keystrokes entered by a user while the user is inputting sensitive information on an input device.
摘要翻译：用于伪装关键点击的关键点击掩码程序和方法通过随机改变由计算机系统生成的按键回放来保护敏感信息。关键点击掩码和方法通过产生声音来伪装实际的击键，这些声音将使用户在用户在输入设备上输入敏感信息时试图确定用户输入的实际击键而混淆听众。

2. 发明授权

US06259792B1 Waveform playback device for active noise cancellation 失效
标题翻译：用于主动噪声消除的波形播放装置
公开(公告)号：US06259792B1
公开(公告)日：2001-07-10
申请号：US08895802
申请日：1997-07-17
申请人： J. Andrew Lambrecht
发明人： J. Andrew Lambrecht
IPC分类号： H04R302
CPC分类号： H04R5/02
摘要： A noise environment is sampled via microphone. A processor generates a cancellation signal to offset the effects of the noise to a listener. The cancellation signal is converted into a sample signal compatible with a synthesizer. The synthesizer adjusts the pitch, amplitude and timing of a sample of a patch set to create a substantially continuous output cancellation signal. The continuous output cancellation signal is output via a speaker. The output cancellation signal combines with the noise environment to reduce the effects of the noise environment on the listener. Alternatively, in previously characterized noise environments, one or more cancellation signals may be stored in processor. The processor receives a user input selecting the appropriate cancellation signal and adjusting the parameters of the cancellation signal. After the processor has calculated or selected the cancellation signal and transferred the sampled signal to the synthesizer, the processor is no longer involved in the generation of the cancellation signal. Therefore, the noise cancellation function requires relatively little processing power and is accomplished without the need for special purpose hardware.
摘要翻译：通过麦克风对噪声环境进行采样。处理器产生消除信号以抵消噪声对听众的影响。消除信号被转换成与合成器兼容的采样信号。合成器调整贴片组的样本的音调，幅度和时序以产生基本上连续的输出消除信号。连续输出消除信号通过扬声器输出。输出消除信号与噪声环境相结合，以减少噪声环境对听众的影响。或者，在先前描述的噪声环境中，一个或多个消除信号可以存储在处理器中。处理器接收选择合适的消除信号并调整消除信号的参数的用户输入。在处理器计算或选择了消除信号并将采样的信号传送到合成器之后，处理器不再涉及消除信号的产生。因此，噪声消除功能需要相对较小的处理能力，并且在不需要专用硬件的情况下实现。

3. 发明授权

US06690800B2 Method and apparatus for communication operator privacy 有权
标题翻译：沟通操作员隐私的方法和装置
公开(公告)号：US06690800B2
公开(公告)日：2004-02-10
申请号：US09683741
申请日：2002-02-08
申请人： Andrew M. Resnick
发明人： Andrew M. Resnick
IPC分类号： H04R302
CPC分类号： H04R3/02
摘要： Disclosed is a device for use with communications equipment to provide privacy for the operator and reduce acoustic noise from the operator's voice in the area. The device uses active acoustic cancellation to silence the voice of the operator once past, and captured by the microphone. Embodiments include the all types of microphones for any type of telephone, transmitting radio, intercom or other communication devices where a operator speaks out loud to communicate with another location.
摘要翻译：公开了一种与通信设备一起使用的设备，以便为操作者提供隐私，并减少该区域中操作者的声音的噪声。该设备使用主动声学消除，使操作者的声音一度过去，并被麦克风捕获。实施例包括用于任何类型的电话的所有类型的麦克风，发射无线电，对讲或其他通信设备，其中操作员大声说出与另一位置通信。

4. 发明授权

US06594365B1 Acoustic system identification using acoustic masking 有权
标题翻译：使用声学掩蔽的声学系统识别
公开(公告)号：US06594365B1
公开(公告)日：2003-07-15
申请号：US09195294
申请日：1998-11-18
申请人： Graham P. Eatwell
发明人： Graham P. Eatwell
IPC分类号： H04R302
CPC分类号： G10K11/17817 , G10K11/17881 , G10K2210/3018 , G10K2210/30232 , G10K2210/30351 , G10K2210/3049 , G10K2210/3053
摘要： A system for identifying a model of an acoustic system in the presence of an external noise signal is disclosed. The system includes an acoustic actuator for generating controlled sound within the acoustic system. A sensor receives the controlled sound and the external noise signal and produces a sensed signal. A control system generates a control signal in response to an error signal. The control system includes a system model for generating an estimated response signal. The control system also generates the error signal representing the difference between the sensed signal and the estimated response signal. A masking threshold generator receives the sensed signal and the error signal and produces spectral shaping parameters. A shaped signal generator for receives the spectral shaping parameters and produces a test signal which is provided as an input to the control system. A signal combining device receives the test signal and the control signal and produces an actuator drive signal for driving the acoustic actuator.
摘要翻译：公开了一种用于在存在外部噪声信号的情况下识别声学系统的模型的系统。该系统包括用于在声学系统内产生受控声音的声学致动器。传感器接收受控声音和外部噪声信号并产生感测信号。控制系统响应于误差信号产生控制信号。控制系统包括用于产生估计的响应信号的系统模型。控制系统还产生表示感测信号与估计的响应信号之差的误差信号。掩蔽阈值生成器接收感测信号和误差信号并产生频谱整形参数。一种成形信号发生器，用于接收频谱整形参数并产生作为输入提供给控制系统的测试信号。信号组合装置接收测试信号和控制信号，并产生用于驱动声致动器的致动器驱动信号。

5. 发明授权

US06188771B1 Personal sound masking system 有权
标题翻译：个人声音遮蔽系统
公开(公告)号：US06188771B1
公开(公告)日：2001-02-13
申请号：US09266186
申请日：1999-03-10
申请人： Thomas R. Horrall
发明人： Thomas R. Horrall
IPC分类号： H04R302
CPC分类号： G10K11/175 , H04K3/42 , H04K3/43 , H04K3/825 , H04K2203/12 , H04K2203/34 , H04R1/1041 , H04R1/1083 , H04R5/033
摘要： A personal sound masking system for use in an individual workspace provides an optimized acoustic background environment by delivering a sound masking signal that is specifically matched to the individual user's location and physical relationship to other nearby offices. The sound masking system employs multiple loudspeakers and multiple mutually incoherent channels in order to obtain a desired degree of diffuseness. A control module includes an erasable programmable read-only memory (EPROM) that stores data representing a number of samples of a masking signal segment, addressing logic that accesses the samples in the memory sequentially and repetitively to generate different series of data values each representing a different masking signal, digital to analog converters that convert the series of samples into analog masking signals, and power amplification circuitry that amplifies the analog masking signals to levels suitable for driving the loudspeakers. The sound masking system also includes a user-accessible volume control to enable the user to adjust the sound level to achieve optimum sound masking in his or her individual workspace.
摘要翻译：用于单个工作空间的个人声音掩蔽系统通过传递与各个用户的位置和与其他附近办公室的物理关系具体匹配的声屏蔽信号来提供优化的声学背景环境。声音掩蔽系统采用多个扬声器和多个相互不相干的通道，以便获得期望的扩散程度。控制模块包括可擦除可编程只读存储器（EPROM），该可擦除可编程只读存储器（EPROM）存储表示掩蔽信号段的采样数量的数据，顺序地重复地访问存储器中的采样的寻址逻辑，以产生不同的一系列数据值，不同的屏蔽信号，将一系列样本转换成模拟屏蔽信号的数模转换器，以及将模拟屏蔽信号放大到适合于驱动扬声器的电平的功率放大电路。声音掩蔽系统还包括用户可访问的音量控制，以使得用户能够调整声音水平以在他或她的单个工作空间中实现最佳声音屏蔽。

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