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公开(公告)号：DE602004026836D1
公开(公告)日：2010-06-10
申请号：DE602004026836
申请日：2004-02-24
Applicant: TOA CORP , ETANI ELECTRONICS CO LTD
Inventor： HIGASHIHARA DAISUKE , HINO SHOKICHIRO , TSUCHIYA KOICHI , ENDO TOMOHIKO
Abstract: Resonant frequencies f2 and f3 detected in a resonant space are determined as center frequencies of a dip. Based on measurement values at a speaker and a microphone in the resonant space, a basic amplitude frequency characteristic Ca and a target amplitude frequency characteristic Cd are found. A smoothness degree on a frequency axis is larger in the target amplitude frequency characteristic Cd than the basic amplitude frequency characteristic Ca. A damping level and quality factor of the dip are determined based on a 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 near the center frequencies.
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公开(公告)号：EP1600941A4
公开(公告)日：2008-07-16
申请号：EP04714019
申请日：2004-02-24
Applicant: TOA CORP , ETANI ELECTRONICS CO LTD
Inventor： HIGASHIHARA DAISUKE , HINO SHOKICHIRO , TSUCHIYA KOICHI , ENDO TOMOHIKO
CPC classification number: H04R29/007 , G01H13/00 , H04R3/04 , H04R2227/007
Abstract: Resonance frequencies f2, f3 detected in a resonance space are decided to be dip center frequencies. According to the measurement values obtained in a loudspeaker and a microphone in the resonance space, a basic amplitude frequency characteristic Ca and a target amplitude frequency characteristic Cd are obtained. The target amplitude frequency characteristic Cd has a greater smoothness than the basic amplitude frequency characteristic Ca on the frequency axis. The dip attenuation level and sharpness are decided according to the difference between the basic amplitude frequency characteristic Ca and the target amplitude frequency characteristic Cd at the dip center frequencies f2, f3 and in the vicinity thereof.
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Patent Agency Ranking3.发明专利
公开(公告)号：AU2003289256A8
公开(公告)日：2004-06-30
申请号：AU2003289256
申请日：2003-12-09
Applicant: TOA CORP , ETANI ELECTRONICS CO LTD
Inventor： TSUCHIYA KOICHI , ENDO TOMOHIKO , HIGASHIHARA DAISUKE , HINO SHOKICHIRO
Abstract: A device 1 for measuring a propagation time of a sound wave comprises a sound source means 11 and a calculation means 12 . The sound source means 11 outputs a time stretched pulse as a sound source signal input to a speaker 3 . The calculation means 12 calculates a cross-correlation function of the time stretched pulse and the sound signal which is output from the speaker 3 and is received in a microphone 4 . Based on the cross-correlation function, the propagation time of the sound wave between the speaker 3 and the microphone 4 is found.
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4.发明专利
公开(公告)号：AU2003289256A1
公开(公告)日：2004-06-30
申请号：AU2003289256
申请日：2003-12-09
Applicant: TOA CORP
Inventor： TSUCHIYA KOICHI , ENDO TOMOHIKO , HIGASHIHARA DAISUKE , HINO SHOKICHIRO
Abstract: A device 1 for measuring a propagation time of a sound wave comprises a sound source means 11 and a calculation means 12 . The sound source means 11 outputs a time stretched pulse as a sound source signal input to a speaker 3 . The calculation means 12 calculates a cross-correlation function of the time stretched pulse and the sound signal which is output from the speaker 3 and is received in a microphone 4 . Based on the cross-correlation function, the propagation time of the sound wave between the speaker 3 and the microphone 4 is found.
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5.发明公开METHOD AND DEVICE FOR MEASURING SOUND WAVE PROPAGATION TIME BETWEEN LOUDSPEAKER AND MICROPHONE 审中-公开方法和用于测量声波之间传输扬声器和麦克风
公开(公告)号：EP1578169A4
公开(公告)日：2008-04-23
申请号：EP03777374
申请日：2003-12-09
Applicant: TOA CORP , ETANI ELECTRONICS CO LTD
Inventor： HIGASHIHARA DAISUKE , HINO SHOKICHIRO , TSUCHIYA KOICHI , ENDO TOMOHIKO
CPC classification number: H04R29/00
Abstract: A sound wave propagation time measurement device (1) includes sound source means (11) and calculation means (12). The sound source means (11) outputs a time stretching pulse as a sound source signal to be input to a loudspeaker (3). The calculation means (12) calculates a correlation function correlating the time stretching pulse with a sound reception signal from a microphone (4) which has received the output sound from the loudspeaker (3). According to this correlation function, the sound wave propagation time between the loudspeaker (3) and the microphone (4) is calculated.
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6.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：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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