Arkamys

Alexandre Fenieres

Frédéric Amadu

Thomas Esnault

A method for reducing parasitic vibrations of a loudspeaker environment while maintaining the perception of the low frequencies of an original electric sound signal for broadcast after processing by the loudspeaker having a cut-off frequency. A vibration frequency band is identified that causes the loudspeaker to vibrate. A low frequency band of the original sound signal having a frequency close to the cut-off frequency of the loudspeaker is identified as an upper limit. At least one harmonic signal from the isolated low frequency band of the original sound signal is generated. The original sound signal and the harmonic signal are combined to obtain a recombined signal. The vibration frequency band is removed from the recombined signal to obtain a signal for broadcast by the loudspeaker.

Method for reducing parasitic vibrations of a loudspeaker environment and associated processing device

A method and device for normalizing the power of an electrical signal, referred to as an original sound signal S. The method detects the envelope of the original sound signal Sand compares the power value of the envelope signal Swith a threshold value K. The gain signal Sis calculated in accordance with the comparison and smoothed to obtain a smoothed gain signal S. The original sound signal Sis delayed by a delay T. The smoothed gain signal Sis applied to the delayed original sound signal Sto obtain a normalized sound signal S. The method is suitable for a source including a plurality of channels.

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Paris, France

Alexandre Fenieres