Audio signal processing

A computer-readable storage device storing executable code that is executable to perform operations comprising:

• generating an estimated system gain spectrum of the acoustic system, wherein the estimated system gain spectrum is updated in real-time to respond to changes in the acoustic system;
• tracking peak gains in the estimated system gain spectrum as the estimated system gain spectrum is updated in real-time;
• identifying based on the tracking at least one frequency at which the estimated system gain spectrum is currently exhibiting a peak gain;
• and
• based on said identification of the at least one frequency, controlling an audio equalizer to apply, to one or more of a first speech containing signal to be played out via an audio output device of the audio device, or a second speech containing signal received via an audio input device of the audio device, an equalization filter to reduce the level of the one or more of the first speech containing signal or the second speech containing signal in a portion of its spectrum that includes the identified frequency, wherein the equalization filter is applied continuously throughout intervals of both speech activity and speech inactivity, and wherein speech inactivity pertains to a portion of the one or more of the first speech containing signal or the second speech containing signal that does not contain speech.

An audio signal processing device for use in an acoustic system, the device comprising:

• an audio output device;
• an audio input device;
• one or more processors;
• a memory device accessible to the one or more processors, the memory device configured to hold executable audio signal processing code, wherein the audio signal processing code is configured when executed by the one or more processors to cause operations of:
• generating an estimated system gain spectrum of the acoustic system, wherein the estimated system gain spectrum is updated in real-time to respond to changes in the acoustic system;
• tracking peak gains in the estimated system gain spectrum as the estimated system gain spectrum is updated in real-time;
• identifying based on the tracking at least one frequency at which the estimated system gain spectrum is currently exhibiting a peak gain;
• and
• based on said identification of the at least one frequency, controlling an audio equalizer to apply, to one or more of a first speech containing signal to be played out via the audio output device, or a second speech containing signal received via the audio input device, an equalization filter to reduce the level of the one or more of the first speech containing signal or the second speech containing signal in a portion of its spectrum that includes the identified frequency, wherein the equalization filter is applied continuously throughout intervals of both speech activity and speech inactivity, and wherein speech inactivity pertains to a portion of the one or more of the first speech containing signal or the second speech containing signal that does not contain speech.