Microphone array sound source location system with imaging overlay

US7162043B2 · kind B2 · utility

Assignees

• CHUBU ELECTRIC POWER COMPANY, INCORPORATED · JP
• KUMAGAI GUMI CO., LTD. · JP
• Yasuhiro Yamashita · JP

Inventors

• Takeshi Sugiyama · Ichinomiya, JP
• Hiroyuki Wada · Nagaokakyo, JP
• Takefumi Zaima · Tokyo, JP
• Masanao Owaki
• Yasuhiro Yamashita · Tokyo, JP

Key dates

• Filing date: Oct 1, 2001
• Grant date: Jan 9, 2007
• Expiry date: Oct 17, 2023

Classification

• Technology area (CPC G): Physics
• CPC primary: G01S5/20
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

In order to locate and display the source of a sound such as a noise at a factory or the like accurately even when it is outside, a pair of microphones (M1, M3) and another pair of microphones (M2, M4) are disposed on the X axis and Y axis with a distance L therebetween, respectively, the direction of the sound source is estimated from a difference between sound arrival times to the microphones (M1, M3) and a difference between sound arrival times to the microphones (M2, M4), an image around the estimated location of the sound source is picked up by a camera, and the above estimated location of the sound source is displayed on the above image displayed on the display of a personal computer.