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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：US07386139B2
公开(公告)日：2008-06-10
申请号：US10454541
申请日：2003-06-05
IPC分类号： H04R5/02
CPC分类号： H04S3/008 , H04R2499/13 , H04S1/002 , H04S3/00
摘要： A sound image control system which is able to concurrently perform sound image localization control for two persons is provided. The sound image control system controls a sound image localization position by reproducing an audio signal from a plurality of loudspeakers. The sound image control system includes at least four loudspeakers for reproducing the audio signal and a signal processing section. The signal processing section sets four points corresponding to both ears of two listeners as control points, and performs signal processing for the audio signal input into the plurality of loudspeakers so that two target sound source positions indicating sound image localization positions of the respective two listeners are set in the same direction with respect to the two listeners. The two target sound source positions are set so as to satisfy the following condition, T1=T2≦T3
摘要翻译： 提供能够同时对两人进行声像定位控制的声像控制系统。 声音图像控制系统通过从多个扬声器再现音频信号来控制声像定位位置。 声音图像控制系统包括用于再现音频信号的至少四个扬声器和信号处理部分。 信号处理部分将与两个听众的双耳相对应的四个点作为控制点，并且对输入到多个扬声器中的音频信号执行信号处理，使得指示相应两个听众的声音图像定位位置的两个目标声源位置是 相对于两个听众设置在相同的方向。 两个目标声源位置被设定为满足以下条件：T 1
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公开(公告)号：US07158644B2
公开(公告)日：2007-01-02
申请号：US10007674
申请日：2001-12-10
申请人： Isao Kakuhari , Kenichi Terai , Hiroyuki Hashimoto
发明人： Isao Kakuhari , Kenichi Terai , Hiroyuki Hashimoto
IPC分类号： H03B29/00
CPC分类号： G10K11/178
摘要： A first rectifying net, a rectifying grid and a second rectifying net are attached, as a rectifying part upstream of a duct through which air for cooling flows. A noise detection microphone detects noise within the duct. An error detection microphone is placed in the downstream side of the noise to detect error noise. An arithmetic circuit inputs a noise signal of the noise detection microphone, carries out an arithmetic of a transfer function so that an output signal of the error detection microphone becomes minimum, and outputs a control signal to a control sound source. The control sound source radiates a control sound having approximately the same sound pressure as and an opposite phase of the noise within the duct. Thus, the coherence between the noise in the upstream and downstream parts increases, thereby enhancing a sound-muffling effect.
摘要翻译： 第一整流网，整流电网和第二整流网，作为用于冷却空气的管道上游的整流部件。 噪声检测麦克风检测管道内的噪音。 误差检测麦克风放置在噪声的下游侧，以检测误差噪声。 算术电路输入噪声检测麦克风的噪声信号，执行传递函数的算术，使得误差检测麦克风的输出信号变为最小，并将控制信号输出到控制声源。 控制声源辐射具有与管道内的噪声大致相同的声压和相反相位的控制声音。 因此，上游和下游部分的噪声之间的相干性增加，从而增强声音消声效果。
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公开(公告)号：US06944309B2
公开(公告)日：2005-09-13
申请号：US09776480
申请日：2001-02-02
CPC分类号： H04S3/004 , H04R5/033 , H04R5/0335 , H04R2205/024 , H04R2460/13 , H04S7/307 , H04S2420/01
摘要： A headphone system includes a headphone; and a signal processing circuit for outputting an acoustic signal to the headphone. The headphone includes a first speaker and a third speaker for a right ear of a listener, a second speaker and a fourth speaker for a left ear of the listener, and a support for supporting the first through fourth speakers so that the first and second speakers are located forward with respect to a vertical plane including a straight line connecting the hole of the right ear and the hole of the left ear of the listener, the second and fourth speakers are located rearward with respect to the vertical plane, and the first through fourth speakers are out of contact with the right ear and the left ear of the listener.
摘要翻译： 耳机系统包括耳机; 以及用于向耳机输出声信号的信号处理电路。 耳机包括用于收听者右耳的第一扬声器和第三扬声器，用于收听者的左耳的第二扬声器和第四扬声器，以及用于支撑第一至第四扬声器的支撑件，使得第一扬声器和第二扬声器 相对于包括连接右耳孔和直听者的左耳孔的直线的垂直平面位于前方，第二和第四扬声器相对于垂直平面位于后方，第一至第 第四个发言者与听众的右耳和左耳不接触。
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公开(公告)号：US5416846A
公开(公告)日：1995-05-16
申请号：US249158
申请日：1994-05-25
CPC分类号： H04R3/002 , G10K11/1784 , G10K2210/1283 , G10K2210/30232 , G10K2210/3027 , G10K2210/3221
摘要： The noise control system of this invention includes: a noise detector for detecting a noise generated from a noise source in order to output a noise detection signal; an adaptive filter portion for outputting a control signal based on the noise detection signal so as to cancel the noise; a control loudspeaker for receiving the control signal that is to radiate a control sound to a predetermined region; and an error detector for detecting a residual error of the noise and the control sound in the predetermined region, wherein the adaptive filter portion includes: an adaptive filter for receiving the noise detection signal and processing the noise detection signal to output a control signal; an IIR filter section for receiving the noise detection signal, performing a filtering process to the noise detection signal according to a predetermined frequency characteristic, and outputting a first processing signal; an operation section for receiving the first processing signal, performing convolution with the first processing signal and a predetermined transfer function, and outputting a second processing signal; and a multiplying section for receiving the second processing signal and the error signal, multiplying the second processing signal by the error signal, and outputting an update signal for updating coefficients of the adaptive filter to the adaptive filter, the predetermined frequency characteristic and the predetermined transfer function being determined based on a control transfer characteristic from the control loudspeaker to the error detector.
摘要翻译： 本发明的噪声控制系统包括：噪声检测器，用于检测从噪声源产生的噪声，以输出噪声检测信号; 自适应滤波器部分，用于基于噪声检测信号输出控制信号以消除噪声; 控制扬声器，用于接收将控制声音辐射到预定区域的控制信号; 以及误差检测器，用于检测预定区域中的噪声残留误差和控制声音，其中自适应滤波器部分包括：自适应滤波器，用于接收噪声检测信号并处理噪声检测信号以输出控制信号; 用于接收噪声检测信号的IIR滤波器部分，根据预定频率特性对噪声检测信号执行滤波处理，并输出第一处理信号; 操作部分，用于接收第一处理信号，执行与第一处理信号和预定传送函数的卷积，并输出第二处理信号; 以及乘法部分，用于接收第二处理信号和误差信号，将第二处理信号乘以误差信号，并将自适应滤波器的系数更新的更新信号输出到自适应滤波器，预定频率特性和预定传送 功能是基于从控制扬声器到误差检测器的控制传递特性来确定的。
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公开(公告)号：US20060188107A1
公开(公告)日：2006-08-24
申请号：US11407247
申请日：2006-04-20
申请人： Toshio Inoue , Hisashi Sano , Akira Takahashi , Kenichi Terai , Hiroyuki Hashimoto , Isao Kakuhari
发明人： Toshio Inoue , Hisashi Sano , Akira Takahashi , Kenichi Terai , Hiroyuki Hashimoto , Isao Kakuhari
CPC分类号： G10K11/178
摘要： An active noise control system is capable of canceling out noise in the passenger compartment of a vehicle based on low-frequency road noise. The active noise control system has a feed-forward control unit for being supplied with reference signals highly correlated to noise from a noise source and generating a noise cancellation signal which is out of phase to noise in the passenger compartment of the vehicle, and a canceling sound generating unit disposed in the passenger compartment for generating a noise canceling sound in response to the noise cancellation signal from said feed-forward control unit. The active noise control system also has microphones for generating reference signals which are positioned respectively near the base of the front seat, near the center of a roof, and within a trunk compartment, i.e., respectively at vibrational antinodes of a primary or secondary acoustic normal mode of the passenger compartment in the longitudinal direction thereof. Output signals from the microphones are supplied as the reference signals.
摘要翻译： 主动噪声控制系统能够基于低频道路噪声消除车辆乘客舱内的噪声。 主动噪声控制系统具有前馈控制单元，用于提供与来自噪声源的噪声高度相关的参考信号，并产生噪声消除信号，该噪声消除信号在车辆的乘客舱中相位相差，并且取消 发声单元，其布置在所述乘客室中，用于响应于来自所述前馈控制单元的噪声消除信号产生噪声消除声音。 主动噪声控制系统还具有用于产生参考信号的麦克风，其分别位于靠近车顶中心的底座附近，并且在行李箱内，即分别位于初级或次级声学正常的振动波腹处 乘客舱的纵向的模式。 来自麦克风的输出信号作为参考信号提供。
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公开(公告)号：US06990207B2
公开(公告)日：2006-01-24
申请号：US09864775
申请日：2001-05-24
申请人： Yoshio Nakamura , Toshihiko Ohashi , Kenichi Terai , Hiroyuki Hashimoto , Isao Kakuhari , Hisashi Sano , Toshio Inoue , Akira Takahashi , Tsuyoshi Yamashita
发明人： Yoshio Nakamura , Toshihiko Ohashi , Kenichi Terai , Hiroyuki Hashimoto , Isao Kakuhari , Hisashi Sano , Toshio Inoue , Akira Takahashi , Tsuyoshi Yamashita
IPC分类号： H03B29/00
CPC分类号： G10K11/178 , G10K2210/12821 , G10K2210/3039
摘要： An active noise control system for reducing road noise of low frequency generated inside the cabin of a vehicle is provided. The active noise control system includes a noise detector, a signal generator for processing the input noise signal to generate a signal for producing noise canceling waves, a limiting amplifier having a specified threshold value for variably amplifying the processed signal so that the amplitude of output signal will not exceed the threshold value, and an electrical acoustic converter for producing noise canceling acoustic waves in accordance with the output signal.
摘要翻译： 提供了一种用于减少车辆舱内产生的低频道路噪声的主动噪声控制系统。 有源噪声控制系统包括噪声检测器，用于处理输入噪声信号以产生产生噪声消除波的信号的信号发生器，具有指定阈值的限幅放大器，用于可变地放大经处理的信号，使得输出信号的幅度 将不超过阈值，以及用于根据输出信号产生噪声消除声波的电声转换器。
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公开(公告)号：US20060009986A1
公开(公告)日：2006-01-12
申请号：US11214397
申请日：2005-08-29
申请人： Hiroyuki Hashimoto , Kenichi Terai , Isao Kakuhari
发明人： Hiroyuki Hashimoto , Kenichi Terai , Isao Kakuhari
摘要： A signal processing apparatus includes an input attribute determination section for determining an input attribute representing at least one of a type of an audio codec, a sampling frequency and a number of channels of an input signal; and an input signal processing section for processing the input signal. The input signal processing section determines whether the input attribute has been changed based on a determination result provided by the input attribute determination section; and when a calculation remainder generated in the input signal processing section by the change in the input attribute, the input signal processing section assigns at least apart of the calculation remainder to processing of the input signal.
摘要翻译： 信号处理装置包括：输入属性确定部分，用于确定表示音频编解码器的类型，输入信号的采样频率和信道数目中的至少一个的输入属性; 以及用于处理输入信号的输入信号处理部分。 所述输入信号处理部基于所述输入属性确定部提供的确定结果来确定所述输入属性是否已被改变; 并且当通过输入属性的变化在输入信号处理部分中产生的计算余数时，输入信号处理部分至少将计算余数的一部分分配给输入信号的处理。
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公开(公告)号：US06731759B2
公开(公告)日：2004-05-04
申请号：US09956192
申请日：2001-09-19
申请人： Kenichi Terai , Hiroyuki Hashimoto , Isao Kakuhari
发明人： Kenichi Terai , Hiroyuki Hashimoto , Isao Kakuhari
IPC分类号： H04R500
CPC分类号： H04R29/001 , H04S1/002 , H04S1/005
摘要： An acoustic signal reproduction device includes a reproduction speaker and a signal processing section for generating an acoustic signal for causing a listener to recognize a reference speaker. The signal processing section includes a compensation data input section for receiving compensation data from the outside of the acoustic signal reproduction device and a calculation section for calculating the acoustic signal based on the audio signal and the compensation data and outputting the acoustic signal to the reproduction speaker. The compensation data has a value H/C, where H is a transfer function from the reference speaker to a control point located in the vicinity of an ear of the listener, and C is a transfer function from the reproduction speaker to the control point located in the vicinity of the ear of the listener.
摘要翻译： 声信号再现装置包括再现扬声器和用于产生用于使听者识别参考扬声器的声信号的信号处理部分。 信号处理部分包括用于从声信号再现装置的外部接收补偿数据的补偿数据输入部分和用于基于音频信号和补偿数据计算声信号的计算部分，并将声信号输出到再现扬声器 。 补偿数据具有值H / C，其中H是从参考扬声器到位于收听者耳朵附近的控制点的传递函数，C是从再现扬声器到位于控制点的传递函数 在听众的耳朵附近。
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公开(公告)号：US06418228B1
公开(公告)日：2002-07-09
申请号：US09353667
申请日：1999-07-15
申请人： Kenichi Terai , Hiroyuki Hashimoto , Isao Kakuhari
发明人： Kenichi Terai , Hiroyuki Hashimoto , Isao Kakuhari
IPC分类号： H03B2900
CPC分类号： G10K11/178 , G10K2210/3012 , G10K2210/3027 , G10K2210/3039
摘要： A noise control system includes: a control sound generator for generating a control sound; an error detector for detecting an error signal between the control sound and noise; a noise detector for detecting a noise source signal; an adaptive filter for outputting a control signal; and a coefficient updator for updating a coefficient of the adaptive filter. The coefficient updator includes at least a first digital filter, a first coefficient update calculator, a second digital filter, a phase inverter, a third digital filter, and a second coefficient update calculator. Alternatively, the coefficient updator includes at least a first digital filter, a second digital filter, a third digital filter, a coefficient update calculator, a phase inverter, a first adder, and a second adder. In either case, the coefficient updator has a function of suppressing an increase in a coefficient gain of the adaptive filter in a predetermined frequency band.
摘要翻译： 噪声控制系统包括：用于产生控制声音的控制声音发生器; 用于检测控制声音和噪声之间的误差信号的误差检测器; 用于检测噪声源信号的噪声检测器; 用于输出控制信号的自适应滤波器; 以及用于更新自适应滤波器的系数的系数更新器。 系数更新器至少包括第一数字滤波器，第一系数更新计算器，第二数字滤波器，相位逆变器，第三数字滤波器和第二系数更新计算器。 或者，系数更新器至少包括第一数字滤波器，第二数字滤波器，第三数字滤波器，系数更新计算器，相位逆变器，第一加法器和第二加法器。 在任一种情况下，系数更新器具有抑制预定频带中的自适应滤波器的系数增益的增加的功能。
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