Apparatus and method for own voice suppression

An own voice suppression apparatus, comprising:

• a first sound receiver configured to output a first audio signal;
• a second sound receiver configured to output a second audio signal;
• and
• an optimal filter communicatively connected to the first sound receiver to receive the first audio signal and generate a third audio signal according to a set of optimal filter coefficients;
• a subtractor communicatively connected to the second sound receiver and the optimal filter to subtract the third audio signal from the second audio signal to obtain an error signal;
• a frequency domain converter communicatively connected to the subtractor to respectively convert the error signal and an omnidirectional signal into an error frequency domain signal and an omnidirectional frequency domain signal, wherein the omnidirectional signal is the first audio signal or the second audio signal or a linear combination of the first audio signal and the second audio signal;
• a spectrum comparator communicatively connected to the frequency domain converter to calculate an amplitude ratio of the error frequency domain signal to the omnidirectional frequency domain signal in each frequency band;
• and
• a compression ratio determiner communicatively connected to the spectrum comparator to determine a compression ratio of each frequency band according to the amplitude ratio of each frequency band.