# 8.4 Localizing multiple sounds

Problem

Read this section when

• Localization performance is degraded by the simultaneous presence of multiple sounds, or

• The user wishes to know the values of the properties of the number of sound sources in the LocalizeMUSIC module.

Solution

As a simplification, the number of sound sources that can be localized simultaneously is equal to or less than the number of microphones to be used. If the number of target sound sources to be localized is $N$ , this value should be set at $N$ . If $M$ noises are heard continuously from a specific direction, then this value should be set at $M+N$ .

Discussion

Theoretically, the MUSIC method can localize sound sources whose number is equal to or less than the number of microphones. That is, when using eight microphones, the maximum number of sound source is eight. Experimentally, however, stable localization can be performed only for up to $3 \sim 4$ sound sources.