A microphone array can be used to locate a dominant acoustic source in a given environment. This capability is successfully employed to locate an active talker in teleconferencing or other multi-speaker applications. In this work the source location is obtained in two steps: 1) a Time Difference Of Arrival (TDOA) computation between the signals of the array; 2) an ‘optimal’ source location based on the interchannel delay estimates and on a geometrical description of the sensor arrangement. The Crosspower Spectrum Phase technique was used for TDOA estimation, while a Maximum Likelihood approach was followed to derive the source coordinates. Source location experiments in a three-dimensional space were performed by means of an array of 8 microphones. For this purpose both a loud-speaker and a real talker were used to collect data in a large noisy and reverberant room
Acoustic Source Location in a Three-Dimensional Space using Crosspower Spectrum Phase
Svaizer, Piergiorgio;Omologo, Maurizio;Matassoni, Marco
1997-01-01
Abstract
A microphone array can be used to locate a dominant acoustic source in a given environment. This capability is successfully employed to locate an active talker in teleconferencing or other multi-speaker applications. In this work the source location is obtained in two steps: 1) a Time Difference Of Arrival (TDOA) computation between the signals of the array; 2) an ‘optimal’ source location based on the interchannel delay estimates and on a geometrical description of the sensor arrangement. The Crosspower Spectrum Phase technique was used for TDOA estimation, while a Maximum Likelihood approach was followed to derive the source coordinates. Source location experiments in a three-dimensional space were performed by means of an array of 8 microphones. For this purpose both a loud-speaker and a real talker were used to collect data in a large noisy and reverberant roomI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
