A method for generating and propagating in a vehicle an audio alarm warning operating with a given first class of risk in regard to functional safety, which comprises: providing, stored, a plurality of acoustic-alarm audio signals (A i), selecting, in said plurality of acoustic-alarm audio signals (A i) stored, an acoustic-alarm audio signal (A i) to be propagated in the audio alarm warning and fetching said acoustic-alarm audio signal (A i), and carrying out audio reproduction of said acoustic-alarm audio signal (A i) said method being characterized by: storing for each acoustic-alarm audio signal (Ai), operating with a second class of risk in regard to functional safety, lower than said first class of risk, a combined audio signal (Mi) which combines said each acoustic-alarm audio signal (Ai) with a respective identification signal (C i), wherein each identification signal (Ci) is an encoded signal in which a respective identifier code (ci) is encoded via digital-encoding, in particular via phase modulation of said respective identifier code (ci); selecting, operating with said first class of risk, in said plurality of combined audio signals (M 1,..., M n) a combined audio signal (M i) that corresponds to the acoustic-alarm audio signal (A i) to be propagated in the audio alarm warning, and fetching, operating with said first class of risk, said combined audio signal (M k) from the plurality of combined audio signals (M i), extracting, operating with said first class of risk, from said combined audio signal (M k) fetched, said identification signal (C i), and extracting, operating with said first class of risk, from said identification signal (C i), said identifier code (c i), verifying, operating according to said first class of risk, the correspondence between said identifier code (c k) of the combined audio signal (M k) fetched and the identifier code (c i) of the acoustic-alarm audio signal (A i) to be propagated in the audio alarm warning. providing, stored, a plurality of acoustic-alarm audio signals (A i), selecting, in said plurality of acoustic-alarm audio signals (A i) stored, an acoustic-alarm audio signal (A i) to be propagated in the audio alarm warning and fetching said acoustic-alarm audio signal (A i), and carrying out audio reproduction of said acoustic-alarm audio signal (A i) said method being characterized by: storing for each acoustic-alarm audio signal (Ai), operating with a second class of risk in regard to functional safety, lower than said first class of risk, a combined audio signal (Mi) which combines said each acoustic-alarm audio signal (Ai) with a respective identification signal (C i), wherein each identification signal (Ci) is an encoded signal in which a respective identifier code (ci) is encoded via digital-encoding, in particular via phase modulation of said respective identifier code (ci); selecting, operating with said first class of risk, in said plurality of combined audio signals (M 1,..., M n) a combined audio signal (M i) that corresponds to the acoustic-alarm audio signal (A i) to be propagated in the audio alarm warning, and fetching, operating with said first class of risk, said combined audio signal (M k) from the plurality of combined audio signals (M i), extracting, operating with said first class of risk, from said combined audio signal (M k) fetched, said identification signal (C i), and extracting, operating with said first class of risk, from said identification signal (C i), said identifier code (c i), verifying, operating according to said first class of risk, the correspondence between said identifier code (c k) of the combined audio signal (M k) fetched and the identifier code (c i) of the acoustic-alarm audio signal (A i) to be propagated in the audio alarm warning. storing for each acoustic-alarm audio signal (Ai), operating with a second class of risk in regard to functional safety, lower than said first class of risk, a combined audio signal (Mi) which combines said each acoustic-alarm audio signal (Ai) with a respective identification signal (C i), wherein each identification signal (Ci) is an encoded signal in which a respective identifier code (ci) is encoded via digital-encoding, in particular via phase modulation of said respective identifier code (ci); selecting, operating with said first class of risk, in said plurality of combined audio signals (M 1,..., M n) a combined audio signal (M i) that corresponds to the acoustic-alarm audio signal (A i) to be propagated in the audio alarm warning, and fetching, operating with said first class of risk, said combined audio signal (M k) from the plurality of combined audio signals (M i), extracting, operating with said first class of risk, from said combined audio signal (M k) fetched, said identification signal (C i), and extracting, operating with said first class of risk, from said identification signal (C i), said identifier code (c i), verifying, operating according to said first class of risk, the correspondence between said identifier code (c k) of the combined audio signal (M k) fetched and the identifier code (c i) of the acoustic-alarm audio signal (A i) to be propagated in the audio alarm warning.