2D Sound Source Localization in Azimuth & Elevation from Microphone Array by Using a Directional Pattern of Element

This paper describes a two-dimensional sound source localization method which uses the directional pattern of each microphone to perform acute beam forming in azimuth and elevation using a 32-channel distributed microphone array. The localization method is based on delay and sum beam forming (DSBF) and frequency band selection (FBS). The microphone arrangement is determined by simulation of the proposed beam forming method. As an example application, a speaker detection system in a house environment is developed using the 32ch microphone array unit, which is mounted on the ceiling of each room. Finally, the 2D directional localization accuracy of the system for multiple sound sources is evaluated.