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公开(公告)号：US5377276A
公开(公告)日：1994-12-27
申请号：US117717
申请日：1993-09-08
IPC分类号： G10K11/178 , H03B29/00
CPC分类号： G10K11/1784 , G10K2210/1282 , G10K2210/3012 , G10K2210/3032 , G10K2210/3045
摘要： An active noise controller includes a prediction filter which includes a delayer for delaying the noise or error detection signal by a predetermined period of time, a first adaptive filter for processing the output of the delayer to deliver its periodic component, and a subtractor for subtracting the output of the first adaptive filter from the noise detection signal to deliver a random component of the signal. More specifically, the prediction filter is capable of dividing the noise or error detection signal into two, periodic and random, components. In addition, two, second and third, adaptive filters are provided for processing the periodic and random components respectively. Accordingly, the second and third adaptive filters become responsive precisely to their respective periodic and random components regardless of the ratio in level between the two components, whereby any undesired noise consisting of the two discrete components will be suppressed.
摘要翻译： 有源噪声控制器包括预测滤波器，该预测滤波器包括用于将噪声或误差检测信号延迟预定时间段的延迟器，用于处理延迟器的输出以递送其周期性分量的第一自适应滤波器，以及减法器 从噪声检测信号输出第一自适应滤波器以传送信号的随机分量。 更具体地，预测滤波器能够将噪声或误差检测信号分成两个，周期性和随机分量。 另外，提供两个，第二和第三个自适应滤波器用于分别处理周期性和随机分量。 因此，第二和第三自适应滤波器对于它们各自的周期性和随机分量而言都是精确地响应，而与两个分量之间的电平之比无关，由此将抑制由两个分立分量组成的任何不需要的噪声。
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公开(公告)号：US4790014A
公开(公告)日：1988-12-06
申请号：US30910
申请日：1987-03-30
申请人： Koji Watanabe , Katsuhiko Hayashi , Nobuaki Minakuchi , Masayuki Misaki , Kenichi Terai , Yasutoshi Nakama , Masaharu Morita
发明人： Koji Watanabe , Katsuhiko Hayashi , Nobuaki Minakuchi , Masayuki Misaki , Kenichi Terai , Yasutoshi Nakama , Masaharu Morita
摘要： An analog sound signal is outputted. Low-frequency components are selected from the outputted analog sound signal so that a low-pitched sound signal is derived from the analog sound signal. A key of the low-pitched sound signal is lowered so that a very-low-pitched sound signal is derived from the low-pitched sound signal. The analog sound signal and the very-low-pitched sound signal may be converted into corresponding sounds respectively.
摘要翻译： 输出模拟声音信号。 从输出的模拟声音信号中选择低频分量，从而从模拟声音信号导出低音声音信号。 降低声音信号的键被降低，从低音声信号得到非常低音的声音信号。 模拟声音信号和非常低音的声音信号可以分别转换成对应的声音。
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公开(公告)号：US07680286B2
公开(公告)日：2010-03-16
申请号：US10852239
申请日：2004-05-25
摘要： A wide frequency range signal from a test sound source is reproduced successively by a plurality of speakers, and the reproduced sound is detected by a plurality of microphones, after which the frequency characteristics are obtained at FFTs, while obtaining the frequency characteristics of the wide frequency range signal at an FFT. A high frequency range level is normalized with a low frequency range level, and a determination section compares the normalized value with a reference value stored in a reference value storage section to determine the number and positions of people in the sound field. The transfer functions between the speakers and the microphones are calculated at transfer function calculators, and impulse responses are obtained at IFFTs, after which a reverberation time calculator calculates the reverberation time based on the impulse responses. An audio signal is adjusted based on the results.
摘要翻译： 来自测试声源的宽频率范围信号由多个扬声器连续再现，并且由多个麦克风检测再现的声音，之后在FFT获得频率特性，同时获得宽频率的频率特性 FFT处的范围信号。 高频范围电平用低频范围电平进行归一化，判定部将归一化值与存储在基准值存储部中的基准值进行比较，以确定声场中的人的数量和位置。 扬声器和麦克风之间的传递函数在传递函数计算器中计算，并且在IFFTs获得脉冲响应，之后混响时间计算器基于脉冲响应计算混响时间。 根据结果调整音频信号。
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公开(公告)号：US5388160A
公开(公告)日：1995-02-07
申请号：US896043
申请日：1992-06-08
IPC分类号： G10K11/178 , H03B29/00
CPC分类号： G10K11/1784 , G10K2210/3012 , G10K2210/3028 , G10K2210/3045
摘要： In a noise suppressor, a noise signal detected by a first detector is inputted to an adaptive filter and a FIR filter. An output signal of the adaptive filter is reproduced by a speaker. The signal reproduced by the speaker and a noise signal from a noise source are detected by a second detector. The signal detected by the second detector is band-limited by a filter circuit and sent to a LMS computing circuit. The LMS computing circuit updates a coefficient of the adaptive filter so as to minimize an output signal of the filter circuit in response to an output signal of the FIR filter and an output signal of the filter circuit.
摘要翻译： 在噪声抑制器中，由第一检测器检测到的噪声信号被输入到自适应滤波器和FIR滤波器。 自适应滤波器的输出信号由扬声器再现。 由第二检测器检测由扬声器再现的信号和来自噪声源的噪声信号。 由第二检测器检测到的信号被滤波器电路限制并发送到LMS计算电路。 LMS计算电路更新自适应滤波器的系数，以便响应于FIR滤波器的输出信号和滤波器电路的输出信号来最小化滤波器电路的输出信号。
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公开(公告)号：US20070274528A1
公开(公告)日：2007-11-29
申请号：US11574137
申请日：2005-09-02
IPC分类号： H04S5/02
CPC分类号： H04S7/30 , H04S2400/11
摘要： A path of a virtual sound source moving through a virtual sound field space and move start and end conditions are input and an effective acoustic signal is generated. An acoustic processing device includes a sound source path input section 12 for inputting path data of a virtual sound source, a sound source position calculation section 13 for successively calculating the move position data of the virtual sound source in response to the path data, a sound source distance calculation section 14 for calculating the distance data between a listener and the virtual sound source, a distance coefficient storage section 15 previously storing coefficient data responsive to the distance between the listening position and the virtual sound source, and an effect sound generation section 17 for selecting any coefficient data in response to the distance data between the listening position and the virtual sound source and generating an effect sound signal obtained about an input sound source signal. According to the configuration, the move path of the virtual sound source moving through the virtual sound field space is specified, the distance to the listening position of the listener is sequentially calculated, and the effective sound signal based on a predetermined distance coefficient is continuously generated from the sound source signal.
摘要翻译： 输入虚拟声源移动通过虚拟声场空间并移动起始和结束条件的路径，并产生有效的声信号。 声学处理装置包括用于输入虚拟声源的路径数据的声源路径输入部12，响应于路径数据连续计算虚拟声源的移动位置数据的声源位置计算部13， 源距离计算部分14，用于计算收听者和虚拟声源之间的距离数据;距离系数存储部分15，其预先存储响应于收听位置和虚拟声源之间的距离的系数数据;以及效果声音产生部分17 用于响应于收听位置和虚拟声源之间的距离数据选择任何系数数据，并产生关于输入声源信号获得的效果声音信号。 根据该结构，指定了通过虚拟声场空间移动的虚拟声源的移动路径，依次计算与收听者的收听位置的距离，并连续生成基于预定距离系数的有效声音信号 从声源信号。
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公开(公告)号：US07054400B2
公开(公告)日：2006-05-30
申请号：US09974442
申请日：2001-10-10
CPC分类号： H04N21/44004 , G06F3/05 , H04N21/4302
摘要： A digital AV signal processing apparatus includes a buffer for storing digital data input to the digital AV signal processing apparatus, and outputting the digital data as output digital data, a D/A converter for converting the output digital data to analog data, a voltage-controlled oscillator for generating a clock signal to control a conversion rate of the D/A converter, and a voltage-controlled oscillator controller for detecting a data amount of the digital data stored in the buffer, and controlling a frequency of the clock signal based on a deviation in the detected data amount from a first predetermined value and a time integral of the deviation value.
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公开(公告)号：US6041126A
公开(公告)日：2000-03-21
申请号：US685573
申请日：1996-07-24
申请人： Kenichi Terai , Hiroyuki Hashimoto
发明人： Kenichi Terai , Hiroyuki Hashimoto
摘要： A noise controlled type handset processes the output of non-directional noise detector installed outside of the handset by a first adaptive filter, delivers a control sound from a control speaker, controls the first adaptive filter so that the output of an error detector near the ear may be small, simultaneously processes the noise detection signal in a second adaptive filter, subtracts from the noise signal mixing into a bi-directional talking microphone, and controls the second adaptive filter so that the subtraction signal may be small, thereby taking back the signal of voice only by reducing noise by delivering through the speaker, and sending a transmission output at the same time.
摘要翻译： 噪声控制型手持机通过第一自适应滤波器处理安装在手持机外部的非定向噪声检测器的输出，从控制扬声器传送控制声音，控制第一自适应滤波器，使得误差检测器在耳朵附近的输出 可以小，同时处理第二自适应滤波器中的噪声检测信号，从混合成双向通话麦克风的噪声信号中减去，并且控制第二自适应滤波器，使得减法信号可能较小，从而取回信号 只有通过扬声器传送减少噪音，同时发送传输输出。
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公开(公告)号：US4121844A
公开(公告)日：1978-10-24
申请号：US824328
申请日：1977-08-12
申请人： Akira Nemoto , Yasunori Hamaguchi , Kenichi Terai
发明人： Akira Nemoto , Yasunori Hamaguchi , Kenichi Terai
CPC分类号： F16J15/52 , F16C11/0671 , F16C11/0685 , Y10T403/32729
摘要： Disclosed is an inverted cup-shaped cover of deformable material to be fitted over an open socket housing end of a pivotal ball joint assembly. The cover has a pair of opposite end openings, one of which is considerably smaller in diameter than the other and receives therethrough in sealed relationship the shank of a ball stud protruding from the housing through an open end thereof. The cover has a gently curved longitudinal sectional configuration and is flared toward its other end opening at which it is fitted over the open end of the housing. A ring is embedded in the flared portion of the cover and has an inner circumferential edge exposed toward the interior of the cover. This inner edge is sharp-angled and has a diameter slightly smaller than the maximum diameter of the housing at the open end thereof. This ring is formed of resilient material, for example, spring steel.
摘要翻译： 公开了可旋转的球形接头组件的开口插座壳体端部上的可变形材料的倒杯形盖。 盖具有一对相对的端部开口，其中一个相对端部的直径明显小于另一个，并以密封的关系从其中通过其开口端从壳体突出地接收穿过其中的球头杆。 盖子具有轻微弯曲的纵向截面形状，并朝着其另一端部开口扩张，在该端部开口处，壳体被安装在壳体的开口端上。 环被嵌入在盖的扩口部分中，并且具有朝向盖的内部暴露的内周边缘。 该内边缘是锐角的，并且其直径略小于外壳在其开口端处的最大直径。 该环由弹性材料形成，例如弹簧钢。
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