专利检索 ap:("Toa Corporation" OR "Etani Electronics Co., Ltd.") AND inv:"TSUCHIYA, Koichi, c/o ETANI ELECTRONICS CO., LTD." 第 1 页

1.

发明公开
METHOD AND DEVICE FOR MEASURING SOUND WAVE PROPAGATION TIME BETWEEN LOUDSPEAKER AND MICROPHONE 审中-公开
标题翻译：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：EP1578169A1

公开(公告)日：2005-09-21

申请号：EP03777374.4

申请日：2003-12-09

申请人： Toa Corporation , Etani Electronics Co., Ltd.

发明人： HIGASHIHARA, Daisuke, c/o Toa Corporation , HINO, Shokichiro, c/o ETANI ELECTRONICS CO., LTD. , TSUCHIYA, Koichi, c/o ETANI ELECTRONICS CO., LTD. , ENDO, Tomohiko, c/o ETANI ELECTRONICS CO., LTD.

IPC分类号： H04R29/00 , H04R3/02

CPC分类号： H04R29/00

摘要： 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.