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. Measure the transfer functions of the microphone array

2. 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

• How should I save localization results in files?

• How should I determine threshold values of SourceTracker ?

• HARK document DisplayLocalization module

• HARK document SaveSourceLocation module