使用麥克風陣列之遠端聲源量測研究

Abstract

交通噪音對人體的健康造成很大的危害，政府在交通噪音的取締上也不遺餘力，民國110年開始，他們採用科技執法推出了一套噪音照相系統，對不當駕駛以及非原廠排氣管進行取締，不但節省了警力，也還給社區一個安寧。然而，該系統的缺點是僅能單向取締，只有在車子經過設定好位置的鏡頭下才有機會進行取締，不但無法知道噪音源的位置，也不能隨意設置攝影機的角度進行全方向取締。本研究利用麥克風陣列對聲源進行定位且量測聲源實際位置，推估出聲源實際的噪音分貝值來達到全景執法的目的，不論噪音源位置皆可以以實際分貝進行取締，並完成一套低成本的感測系統。

Traffic noise has caused great harm to human health, and the government has spared no effort in banning traffic noise. Since 2021, they implement a noise camera system using technology enforcement, the main purpose is to detect improper driving behavior and non-original exhaust pipes. The system not only saves police effort, but also let communities return to quiet. However, the disadvantages of the system are that it can only detect in single direction, and the drivers can only be banned when they pass through the camera in the system with fixed camera position. Not only is there no way to know where the noise source is, but there's no way to adjust the angle of the camera to ban drivers from all directions. This research uses the microphone arrays to locate the sound source and measure the actual position of the sound source, and estimate the actual decibel value of the sound source to achieve the purpose of system to ban drivers who drive illegally from all directions. Regardless of the location of the noise source, the actual decibel can be estimated. This research also completed a low-cost sensing system.