Electronic processing device and processing method, associated acoustic apparatus and computer program

An electronic processing device for an acoustic apparatus,

• the acoustic apparatus comprising a first microphone including an electroacoustic transducer adapted to receive acoustic sound waves of a sound signal from a user's vocal chords and to transform said acoustic waves into a first analog signal;
• and a second microphone including a bone-mechanically excited transducer adapted to receive vibratory oscillations of said sound signal by bone conduction and to transform said vibratory oscillations into a second analog signal,
• the electronic processing device being configured for being connected to the first and second microphones, to receive as input, the first and second analog signals and to output a corrected signal,
• the electronic processing device comprising:
• a hybridization module configured for calculating a hybrid signal from the first and second analog signals;
• an estimation module connected to the hybridization module and configured for estimating noise in the hybrid signal;
• and
• a noise reduction module connected to the hybridization module and to the estimation module, the noise reduction module being configured for calculating the corrected signal by applying a generalized spectral subtraction algorithm to the hybrid signal and according to the estimated noise.