Method for determining a phase filter for a system for generating vibrations perceptible by a user comprising several transducers

A method for determining a phase filter for a system for generating vibrations perceptible by a user comprising a signal source configured to deliver a first electrical signal and a second electrical signal, and a pair of transducers comprising a first transducer for converting the first electrical signal into vibrations perceptible by a user and a second transducer for converting the second electrical signal into vibrations perceptible by a user, the phase filter being provided to introduce a relative phase shift between the first electrical signal and the second electrical signal, the method comprising:

• performing, for at least one determined perception position, of a plurality of spectral measurements of a characteristic parameter of the vibrations generated in this perception position as a function of the frequency, each spectral measurement being done for a respective phase shift value between the first electrical signal and the second electrical signal, and
• determining a phase filter from spectral measurements done, by selecting, for each frequency, a phase shift value from among the phase shift values used to perform the spectral measurements.