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公开(公告)号：JP2005045569A
公开(公告)日：2005-02-17
申请号：JP2003277975
申请日：2003-07-23
Applicant: Toa Corp , ティーオーエー株式会社
Inventor： HIGASHIHARA DAISUKE
CPC classification number: H04R29/007 , H04R3/02 , H04R27/00 , H04R2227/007
Abstract: PROBLEM TO BE SOLVED: To provide a measurement device capable of measuring a howling margin objectively and accurately without relying on the auditory of an operator.
SOLUTION: A howling margin measurement device 20 compresses and outputs an inputted voice signal at a prescribed ratio if the level of inputted voice signal is at a threshold level or higher. A control means 23 reads the compression level of a compressor 22 while gradually raising the gain of a gain adjusting means 21. Based on whether the read compression level is at least at a prescribed level or higher or not, the control means judges occurrence of howling. A howling margin is calculated based on the gain of the gain adjusting means 21 when the howling is judged to have occurred.
COPYRIGHT: (C)2005,JPO&NCIPIAbstract translation: 要解决的问题：提供一种能够客观准确地测量嚎叫边缘而不依赖于操作者的听觉的测量装置。 解决方案：如果输入的语音信号的电平处于阈值或更高，则啸叫余量测量装置20以规定的比例压缩并输出输入的语音信号。 控制装置23在逐渐提高增益调节装置21的增益的同时读取压缩机22的压缩电平。根据读取压缩水平是否至少达到规定水平以上，控制装置判断啸声发生 。 当判断出啸声发生时，基于增益调节装置21的增益来计算啸叫余量。 版权所有（C）2005，JPO＆NCIPI
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公开(公告)号：JP2004264377A
公开(公告)日：2004-09-24
申请号：JP2003051147
申请日：2003-02-27
Applicant: Etani Denki Kk , Toa Corp , エタニ電機株式会社 , ティーオーエー株式会社
Inventor： HIGASHIHARA DAISUKE , HINO SHIYOUKICHIROU , TSUCHIYA KOICHI , ENDO TOMOHIKO
CPC classification number: H04R29/007 , G01H13/00 , H04R3/04 , H04R2227/007
Abstract: PROBLEM TO BE SOLVED: To provide a frequency characteristic determination method of a dip filter that can properly determine characteristics of the dip filter, without requiring experience and skill because the dip filter is used for resonation prevention, an operator or the like of an acoustic facility relies on own hearing to hear out resonated sounds so as to decide the resonation frequency as a removal frequency of the dip filter, and sets the attenuation level and sharpness of dip by rule of thumb. SOLUTION: The resonation frequencies f2 and f3 detected in a resonated space are determined as the center frequencies of the dip. A basic amplitude frequency characteristic Ca and a target amplitude frequency characteristic Cd are obtained, on the basis of the measured values of a speaker and a microphone in the resonated space. In the target amplitude frequency characteristic Cd, smoothness on the frequency axis is larger than that of the basic amplitude frequency characteristic Ca. The attenuation level and the sharpness of the dip are determined, on the basis of the difference between the basic amplitude frequency characteristic Ca and the target amplitude frequency characteristic Cd in the center frequencies f2 and f3 of the dip and frequencies in the vicinity thereof. COPYRIGHT: (C)2004,JPO&NCIPI
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13.发明专利Resonance frequency detection method, resonance frequency selection method, and resonance frequency detection device 有权谐振频率检测方法，共振频率选择方法和共振频率检测装置
公开(公告)号：JP2004239927A
公开(公告)日：2004-08-26
申请号：JP2003021558
申请日：2003-01-30
Applicant: Toa Corp , ティーオーエー株式会社
Inventor： HIGASHIHARA DAISUKE
Abstract: PROBLEM TO BE SOLVED: To solve the following problem; conventionally, to detect a resonance frequency, a signal for measurement has been radiated from a loudspeaker, and received by a microphone to analyze the sound signal received by the microphone, but to accurately detect the resonance frequency, not only the result of this analysis, but also it is necessary for a measuring person after all to listen to the sound and judge the resonance frequency. SOLUTION: This resonance frequency detection device 20 is provided with a sound source means 21, signal composition changeover means 26, 27, and a measuring means 25. The signal composition changeover means 26, 27 are able to change over from/to a 1st state of outputting the signal for measurement to/from a 2nd state of outputting a composite signal of the signal for measurement and an output signal from the microphone 14. The detection device 20 is so arranged as to detect the resonance frequency based on the comparison between a 1st amplitude frequency characteristic measured in the 1st state output and a 2nd amplitude frequency characteristic measured in the 2nd state. COPYRIGHT: (C)2004,JPO&NCIPI
Abstract translation: 要解决的问题：解决以下问题; 传统上，为了检测共振频率，用于测量的信号已经从扬声器辐射并且由麦克风接收以分析由麦克风接收的声音信号，但是为了精确地检测共振频率，不仅该分析的结果， 而且测量人员毕竟要听声并判断共振频率是必要的。 解决方案：该谐振频率检测装置20设置有声源装置21，信号组合转换装置26,27和测量装置25.信号合成转换装置26,27能够从/到 向第二状态输出用于测量的信号的第一状态，输出用于测量的信号的复合信号和来自麦克风14的输出信号。检测装置20被布置成基于 在第一状态输出中测量的第一幅度频率特性与在第二状态下测量的第二振幅频率特性之间的比较。 版权所有（C）2004，JPO＆NCIPI
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14.发明专利Resonance frequency detecting method, resonance frequency selecting method, and resonance frequency detecting device 有权谐振频率检测方法，谐振频率选择方法和谐振频率检测装置
公开(公告)号：JP2005318094A
公开(公告)日：2005-11-10
申请号：JP2004131629
申请日：2004-04-27
Applicant: Toa Corp , ティーオーエー株式会社
Inventor： HIGASHIHARA DAISUKE
CPC classification number: H04R29/007 , H04R27/00
Abstract: PROBLEM TO BE SOLVED: To accurately detect a resonance frequency without requiring experience nor skill since the resonance frequency is detected conventionally by radiating a signal for measurement from a speaker, receiving it by a microphone, and analyzing the output signal of the microphone and not only the analysis result, but also a final measurer's judgment of the resonance frequency by hearing are needed for accurate detection of the resonance frequency. SOLUTION: The resonance frequency in a sound reinforcement space is detected based upon basic amplitude frequency characteristics obtained by radiating the specified signal for measurement from the speaker 13 arranged in the sound reinforcement space 40, 1st amplitude frequency characteristics obtained by radiating the signal for measurement and a 1st delay signal generated by delaying the output of the microphone 14 by a 1st delay time of ≥0 and receiving a sound by the microphone 14, and 2nd amplitude frequency characteristics obtained by radiating the output signal of the microphone 14 and a 2nd delay signal generated by delaying the output of the microphone 14 by a 2nd delay time of ≥0 and receiving a sound. Here, the 2nd delay time and 1st delay time are different from each other. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract translation: 要解决的问题：为了准确地检测谐振频率而不需要经验和技术，因为常规地通过从扬声器辐射测量信号来检测谐振频率，通过麦克风接收谐振频率，并且分析麦克风的输出信号 而且不仅分析结果，而且对于谐振频率的精确检测，需要通过听觉来判断谐振频率的最终测量者。 解决方案：基于通过从布置在扩声空间40中的扬声器13辐射测量的指定信号而获得的基本幅度频率特性来检测扩声空间中的共振频率，通过辐射信号获得的第一振幅频率特性 以及通过将麦克风14的输出延迟≥0的第一延迟时间并接收麦克风14的声音而产生的第一延迟信号，以及通过辐射麦克风14的输出信号和第二振幅频率特性 通过将麦克风14的输出延迟第二延迟时间≥0并接收声音而产生的第二延迟信号。 这里，第二延迟时间和第一延迟时间彼此不同。 版权所有（C）2006，JPO＆NCIPI
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公开(公告)号：JP2004266385A
公开(公告)日：2004-09-24
申请号：JP2003051157
申请日：2003-02-27
Applicant: Toa Corp , ティーオーエー株式会社
Inventor： HIGASHIHARA DAISUKE
CPC classification number: H04R29/007 , G01H13/00 , H04R3/04 , H04R2227/007
Abstract: PROBLEM TO BE SOLVED: To solve the problem that appropriate setting requires skill even though a dip filter is sometimes used for resonance prevention and an operator, etc., for a sound facility recognizes resonance sound depending on his/her own sense of hearing to determine a resonance frequency, setting an attenuation level of a dip and the degree of its sharpness according to an empirical rule with the resonance frequency as an eliminating frequency. SOLUTION: Resonance frequencies f2 and f3 detected in a resonance space are determined as a center frequency of the dip. A basic amplitude frequency characteristic Ca and a target amplitude frequency characteristic Cd are calculated on the basis of values measured by a speaker and a microphone in the resonance space. Smoothness on a frequency base is larger in the target amplitude frequency characteristic Cd than in the basic amplitude frequency characteristic Ca. The attenuation level of the dip and the degree of sharpness are determined on the basis of a difference between the basic amplitude frequency characteristic Ca and the target amplitude frequency characteristic Cdin the center frequencies f2 and f3 of the dip and in their neighboring frequencies, wherein frequencies below a prescribed frequency are not made to be a center frequency of the dip. COPYRIGHT: (C)2004,JPO&NCIPI
Abstract translation: 要解决的问题：为了解决即使浸渍过滤器有时用于共振预防和操作者等的适当设定需要技能的问题，对于声音设施来说，根据他/她自己的感觉来识别共鸣声 听觉以确定共振频率，根据以共振频率作为消除频率的经验规则设置倾角的衰减水平和其锐度的程度。 解决方案：在共振空间中检测到的共振频率f2和f3被确定为倾角的中心频率。 基于由谐振空间中的扬声器和麦克风测量的值来计算基本幅度频率特性Ca和目标振幅频率特性Cd。 频率基础上的平滑度在目标振幅频率特性Cd中大于基本振幅频率特性Ca. 根据基本振幅频率特性Ca与倾角的中心频率f2和f3之间的目标振幅频率特性Cdin及其相邻频率之间的差异来确定倾角的衰减水平和锐度程度，其中频率 低于规定频率不能成为倾角的中心频率。 版权所有（C）2004，JPO＆NCIPI
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Patent Agency Ranking
公开(公告)号：JP2004200883A
公开(公告)日：2004-07-15
申请号：JP2002365293
申请日：2002-12-17
Applicant: Toa Corp , ティーオーエー株式会社
Inventor： HIGASHIHARA DAISUKE
Abstract: PROBLEM TO BE SOLVED: To provide a howling suppression apparatus capable of effectively suppressing a howling by making frequency information from an adaptive notch filter constant so as to easily estimate the howling frequency. SOLUTION: The howling suppression apparatus 10 is provided with: a signal input section 11; a dip filter 15; the adaptive notch filter 14; a pre-stage filter 13; and a control means 16. The pre-stage filter 13 is a high pass filter, a low pass filter, or a band pass filter. The pre-stage filter 13 after passing a signal from the signal input section 11, transmits the signal to the adaptive notch filter 14. The control means 16 estimates the howling frequency on the basis of a signal of a periodic signal outputted from the adaptive notch filter 14 on the basis of a prescribed estimate criterion and sets the estimated howling frequency as an eliminating frequency of the dip filter 15. COPYRIGHT: (C)2004,JPO&NCIPI
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公开(公告)号：JP2001285986A
公开(公告)日：2001-10-12
申请号：JP2000093052
申请日：2000-03-30
Applicant: TOA CORP
Inventor： HIGASHIHARA DAISUKE
Abstract: PROBLEM TO BE SOLVED: To provide a howling suppression device capable of reducing an operation scale and shortening operation time. SOLUTION: In this howling suppression device provided with a digital filter 4 for turning a howling frequency included in digital input signals to a removal frequency and a control part DSP for detecting the howling frequency and setting the center frequency of the digital filter 4 to the howling frequency, the control part DSP is provided with an adaptive notch filter 12 for detecting the howling frequency.
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公开(公告)号：JP2008252932A
公开(公告)日：2008-10-16
申请号：JP2008140919
申请日：2008-05-29
Applicant: Toa Corp , ティーオーエー株式会社
Inventor： HIGASHIHARA DAISUKE
IPC: H04R3/04
Abstract: PROBLEM TO BE SOLVED: To detect a resonant frequency while discriminating it from a feedback frequency.
SOLUTION: A resonant frequency detecting method includes an attenuation characteristic measuring step of measuring the attenuation characteristic of an output signal from a microphone disposed in a resonance space by loudly sounding a reference frequency signal that continues for a prescribed time, from a speaker disposed in the resonance space and receiving the sound by the microphone. On the basis of the attenuation characteristic, a resonant frequency in the resonance space is detected. The reference frequency signal is a sine wave signal of a specific frequency or a signal having a component within a prescribed frequency width around the specific frequency.
COPYRIGHT: (C)2009,JPO&INPITAbstract translation: 要解决的问题：在将其与反馈频率区分开的同时检测谐振频率。 解决方案：一种谐振频率检测方法，包括：衰减特性测量步骤，通过从扬声器大声地探测持续规定时间的参考频率信号，测量来自设置在谐振空间中的麦克风的输出信号的衰减特性 设置在共振空间中并且由麦克风接收声音。 基于衰减特性，检测共振空间中的谐振频率。 参考频率信号是特定频率的正弦波信号或具有围绕特定频率的规定频率宽度内的分量的信号。 版权所有（C）2009，JPO＆INPIT
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19.发明专利
公开(公告)号：JP2004193782A
公开(公告)日：2004-07-08
申请号：JP2002357095
申请日：2002-12-09
Applicant: Etani Denki Kk , Toa Corp , エタニ電機株式会社 , ティーオーエー株式会社
Inventor： HIGASHIHARA DAISUKE , HINO SHIYOUKICHIROU , TSUCHIYA KOICHI , ENDO TOMOHIKO
CPC classification number: H04R29/00
Abstract: PROBLEM TO BE SOLVED: To solve the problem that it is difficult to receive a pulse sound by a microphone in a state of excellent S/N ratio because the pulse sound has a small energy with respect to its amplitude, in a conventionally proposed method for measuring the propagation time of sound waves between a speaker and a microphone by using a pulse.
SOLUTION: A sound wave propagation time measuring instrument 1 is provided with a sound source means 11 and an operating means 12. The means 11 outputs a time postponing pulse as a sound source signal to be inputted into the speaker 3. The means 12 calculates a cross-correlation function between the time postponing pulse and a sound-reception signal from the microphone 4 which has received the sound outputted from the speaker 3. The propagation time of the sound waves between the speaker 3 and the microphone 4 is obtained on the basis of the cross-correlation function.
COPYRIGHT: (C)2004,JPO&NCIPI-
公开(公告)号：JP2004193768A
公开(公告)日：2004-07-08
申请号：JP2002356878
申请日：2002-12-09
Applicant: Toa Corp , ティーオーエー株式会社
Inventor： HIGASHIHARA DAISUKE
Abstract: PROBLEM TO BE SOLVED: To provide a microphone signal input level adjusting apparatus which enables an inexperienced or unskilled adjusting person to perform proper level adjustment. SOLUTION: The microphone signal input level adjusting apparatus is provided with an input signal level adjusting means 12, an average level detecting means 20, a comparing means 31, and a display means 33. The means 12 can receive a sound signal from a microphone and adjust the level of the input sound signal. The means 20 detects the average level of the level-adjusted sound signal by the means 12. The means 31 compares the average level detected by the means 20 with a preset reference value. The means 33 executes different display, depending on a result of comparison of the means 31. COPYRIGHT: (C)2004,JPO&NCIPI
Abstract translation: 要解决的问题：提供一种麦克风信号输入电平调节装置，其使得经验不足或不熟练的调节人员能够进行适当的电平调整。 麦克风信号输入电平调节装置具有输入信号电平调整装置12，平均电平检测装置20，比较装置31和显示装置33.装置12可以接收来自 麦克风并调节输入声音信号的电平。 装置20通过装置12检测电平调节声音信号的平均电平。装置31将由装置20检测到的平均电平与预设的参考值进行比较。 装置33根据装置31的比较结果执行不同的显示。（C）2004年，JPO和NCIPI
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