Method for reducing parasitic vibrations of a loudspeaker environment while allowing to maintain the perception of the low frequencies of an electric sound signal (S1), called original sound signal, intended to be broadcast after processing by said loudspeaker (HP) having a cut-off frequency (fc), the method including the following steps: - identifying a frequency band that causes the environment of the loudspeaker (HP) to vibrate, called vibration frequency band, - isolating a low frequency band (S2) of the original sound signal (S1) having as upper limit a frequency close to the cut-off frequency (fc) of the loudspeaker (HP), - generating at least one harmonic signal (S3) from the isolated low frequency band (S2) of the original sound signal (S3), and - combining the original sound signal (S1) and the harmonic signal (S3) to obtain a recombined signal (S6), the method characterised in that it includes the step of: - removing the vibration frequency band of a low frequency band from the recombined signal (S6) by means of a lowpass filter (FLPa) and subsequently a rejection filter (Frej), then combining the signal (S9) obtained, after compression of said signal (S9) obtained, with a highfrequency recombined signal (S7) obtained from the recombined signal (S6) by means of a high-pass filter (FHPa) to obtain a signal that can be broadcast by the loudspeaker (HP) . the method including the following steps: - identifying a frequency band that causes the environment of the loudspeaker (HP) to vibrate, called vibration frequency band, - isolating a low frequency band (S2) of the original sound signal (S1) having as upper limit a frequency close to the cut-off frequency (fc) of the loudspeaker (HP), - generating at least one harmonic signal (S3) from the isolated low frequency band (S2) of the original sound signal (S3), and - combining the original sound signal (S1) and the harmonic signal (S3) to obtain a recombined signal (S6), - identifying a frequency band that causes the environment of the loudspeaker (HP) to vibrate, called vibration frequency band, - isolating a low frequency band (S2) of the original sound signal (S1) having as upper limit a frequency close to the cut-off frequency (fc) of the loudspeaker (HP), - generating at least one harmonic signal (S3) from the isolated low frequency band (S2) of the original sound signal (S3), and - combining the original sound signal (S1) and the harmonic signal (S3) to obtain a recombined signal (S6), the method characterised in that it includes the step of: - removing the vibration frequency band of a low frequency band from the recombined signal (S6) by means of a lowpass filter (FLPa) and subsequently a rejection filter (Frej), then combining the signal (S9) obtained, after compression of said signal (S9) obtained, with a highfrequency recombined signal (S7) obtained from the recombined signal (S6) by means of a high-pass filter (FHPa) to obtain a signal that can be broadcast by the loudspeaker (HP) . - removing the vibration frequency band of a low frequency band from the recombined signal (S6) by means of a lowpass filter (FLPa) and subsequently a rejection filter (Frej), then combining the signal (S9) obtained, after compression of said signal (S9) obtained, with a highfrequency recombined signal (S7) obtained from the recombined signal (S6) by means of a high-pass filter (FHPa) to obtain a signal that can be broadcast by the loudspeaker (HP) . <EOS>