Method for determining a direction of propagation of a sound source by creating sinusoidal signals from sound signals received by microphones

A audio system for determining a direction, the audio system comprising:

• at least one sound source;
• an array of microphones capturing sound emitted by the at least one sound source;
• at least one central unit;
• at least one non-transitory computer readable medium comprising instructions stored thereon which when executed by the at least one central unit configure the audio system to execute a method of determining the direction, comprising:
• emitting the sound by way of the at least one sound source and recording sound signals received by the array of microphones,
• performing with at least one processing device:
• executing cross-correlations between the received sound signals in order to deduce relative times of arrival therefrom,
• creating a sinusoidal function of time having a determined frequency and a phase offset dependent on the relative times of arrival,
• computing to determine a direction value of the at least one sound source in a spatial reference frame defined by the array of microphones, using values computed from the sinusoidal function of time at input, and
• presenting the direction value.