Suppressing noise in an audio signal

A method for suppressing noise in an audio signal, comprising:

• receiving an input audio signal;
• computing, on an electronic device, an overall noise estimate based on a stationary noise estimate, a non-stationary noise estimate and an excess noise estimate;
• computing, on the electronic device, an adaptive factor based on an input Signal-to-Noise Ratio (SNR) and one or more SNR limits, wherein each SNR limit is a turning point;
• computing, on the electronic device, a set of gains using a spectral expansion gain function, wherein the spectral expansion gain function is based on the overall noise estimate and the adaptive factor;
• applying the set of gains to the input audio signal to produce a noise-suppressed audio signal;
• and
• providing the noise-suppressed audio signal.

A computer-program product for suppressing noise in an audio signal, the computer-program product comprising a non-transitory computer-readable medium having instructions thereon, the instructions comprising:

• code for receiving an input audio signal;
• code for computing an overall noise estimate based on a stationary noise estimate, a non-stationary noise estimate and an excess noise estimate;
• code for computing an adaptive factor based on an input Signal-to-Noise Ratio (SNR) and one or more SNR limits, wherein each SNR limit is a turning point;
• code for computing a set of gains using a spectral expansion gain function, wherein the spectral expansion gain function is based on the overall noise estimate and the adaptive factor;
• code for applying the set of gains to the input audio signal to produce a noise-suppressed audio signal;
• and
• code for providing the noise-suppressed audio signal.