A method for generating an audio signal representing the dynamic state of a land vehicle as a function of the value of at least one first parameter (ESP, VSP) that indicates the dynamic state of said land vehicle and on the basis of an input audio signal, said method being characterized in that it comprises: - receiving an input audio signal and dividing said input audio signal into a set of audio frames (F 1, F 2,..., F M) of given duration; - selecting, in said set of audio frames (F 1, F 2,..., F M), an audio frame representing said input audio signal; - subdividing said selected audio frame into a set of audio sub-frames (SBF 1, SBF 2,..., SBF N) of given duration; and - synthesizing said audio signal representing the dynamic state of a land vehicle by generating a sequence of said audio sub-frames (SBF 1, SBF 2,..., SBF N), said method further comprising computing a centre frequency of the frequency spectrum of said selected audio frame; and said operation of synthesizing said audio signal representing the dynamic state of a land vehicle further comprising carrying out a frequency shift of the centre frequency of said subsequent audio sub-frame (SSBF) as a function of said centre frequency of the frequency spectrum of said selected audio frame and of the value of said at least one first parameter (ESP, VSP) that indicates the dynamic state of said land vehicle, thereby generating a frequency-shifted subsequent audio sub-frame (PSBF), characterised in that said step of synthesizing said audio signal comprises the step of: determining transition probabilities between orderly pairs of said audio sub-frames (SBF 1, SBF 2,..., SBFN), and in that in said step of synthesizing said audio signal, each subsequent audio sub-frame (SSBF) in said sequence is selected as a function of the current audio sub-frame and of the transition probability associated therewith. said method being characterized in that it comprises: - receiving an input audio signal and dividing said input audio signal into a set of audio frames (F 1, F 2,..., F M) of given duration; - selecting, in said set of audio frames (F 1, F 2,..., F M), an audio frame representing said input audio signal; - subdividing said selected audio frame into a set of audio sub-frames (SBF 1, SBF 2,..., SBF N) of given duration; and - synthesizing said audio signal representing the dynamic state of a land vehicle by generating a sequence of said audio sub-frames (SBF 1, SBF 2,..., SBF N), - receiving an input audio signal and dividing said input audio signal into a set of audio frames (F 1, F 2,..., F M) of given duration; - selecting, in said set of audio frames (F 1, F 2,..., F M), an audio frame representing said input audio signal; - subdividing said selected audio frame into a set of audio sub-frames (SBF 1, SBF 2,..., SBF N) of given duration; and - synthesizing said audio signal representing the dynamic state of a land vehicle by generating a sequence of said audio sub-frames (SBF 1, SBF 2,..., SBF N), said method further comprising computing a centre frequency of the frequency spectrum of said selected audio frame; and said operation of synthesizing said audio signal representing the dynamic state of a land vehicle further comprising carrying out a frequency shift of the centre frequency of said subsequent audio sub-frame (SSBF) as a function of said centre frequency of the frequency spectrum of said selected audio frame and of the value of said at least one first parameter (ESP, VSP) that indicates the dynamic state of said land vehicle, thereby generating a frequency-shifted subsequent audio sub-frame (PSBF), determining transition probabilities between orderly pairs of said audio sub-frames (SBF 1, SBF 2,..., SBFN), and in that in said step of synthesizing said audio signal, each subsequent audio sub-frame (SSBF) in said sequence is selected as a function of the current audio sub-frame and of the transition probability associated therewith.