SOUND SOURCE PROBING SYSTEM

• Main Authors: SARUWATARI KATSUMI, ISHIHAMA MASAO, HOUZU HIROYUKI, SAKAMOTO ICHIRO
• Format: Patent
• Language: English; Japanese
• Published: 24.08.2015
• Subjects: ANALOGOUS ARRANGEMENTS USING OTHER WAVES; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES; MEASURING; PHYSICS; RADIO DIRECTION-FINDING; RADIO NAVIGATION; TESTING

PROBLEM TO BE SOLVED: To provide a sound source probing system capable of accurately probing the sound source of a vehicle travelling down a road.SOLUTION: The sound source probing system comprises: a microphone array 10 having a plurality of microphones 11 arranged up and down at the flank of a road 101 facing the road; a camera 20 for photographing a vehicle 100 passing through the road; and a sound source analysis personal computer 50 for probing a sound source on the road by constructing a reflector model for a sound emitted from the vehicle 100 running down the road 101 on the basis of preset information representing a sound reflector in the periphery of the road and the photographed image obtained by photographing with the camera 20, and by executing delay-addition arithmetic in which a delay in sound propagation by reflection at the reflector model is incorporated into a plurality of sound signals. 【課題】道路を走行している車両の音源を正確に探査することができる音源探査システムを提供する。【解決手段】道路１０１の脇にその道路に向けて上下に配列された複数のマイクロホン１１を有するマイクロホンアレイ１０と、道路を通過する車両１００を撮影するカメラ２０と、道路周辺の音反射体を表わすプリセット情報およびカメラ２０による撮影により得られた撮影画像に基づいて道路１０１を走行する車両１００から発せられた音の反射体モデルを構築し、複数の音信号に反射体モデルでの反射による音伝播の遅延を組み入れた遅延加算演算を実行することにより道路上の音源を探査する音源解析用パソコン５０とを備えた。【選択図】図１