8.5 Checking if sound source localization is successful

Problem

Read this section if

• You wish to confirm that the LocalizeMUSIC module was successful in performing sound source localization, or

• When processing using localization results, such as sound source separation with the GHDSS module, does not perform well.

Solution

Localize a voice and a sound from a speaker in a specific direction and confirm their localization by collating with localization results. To confirm localization results, use the DisplayLocalization module and SaveSourceLocation . To confirm the accuracy of localization, set MIN_DEG of LocalizeMUSIC to - 180 and MAX_DEG to 180 so that sounds from all directions can be localized. If a sound does not come from a specific direction, the localization results may become stable by restricting the direction of the sound source; i.e., by setting MIN_DEG and MAX_DEG appropriately.

Discussion

To improve localization accuracy

1. bsec:Localization: 003]Measure the transfer functions of the microphone array

2. bsec:Localization: 008]Appropriately tune the SourceTracker 

3. Set so that localization is not performed from an angle at which where there is not a sound source.

See Also

• bsec:Localization: 013]How should I save localization results in files?

• bsec:Localization: 008]How should I determine threshold values of SourceTracker ?

• HARK document: DisplayLocalization module

• HARK document: SaveSourceLocation module