Audio signal processing for sound compensation

An audio signal processing system for sound enhancement by an against the ear audio device, the system comprising:

• a processor;
• and
• memory having stored therein instructions that configure the processor to
• determine signal energy in a plurality of auditory sub-bands of an input audio signal,
• determine sound pressure level, SPL, in the plurality of auditory sub-bands based on the signal energy and based on sound output sensitivity of the against-the-ear audio device,
• determine a plurality of gain lookup tables, based on a hearing profile of a user of the against-the-ear audio device, wherein each gain lookup table outputs gain as a function of in-ear sound pressure level, SPL, in a sub-band, and
• determine a plurality of sub-band gains that are to be applied to the input audio signal, based on the determined SPL and using a selected one of the plurality of gain lookup tables that is selected based on audio content of the input audio signal.

A computer readable storage medium comprising instructions stored therein that configure a processor to:

• determine signal energy in a plurality of auditory sub-bands of an input audio signal,
• determine sound pressure level, SPL, in the plurality of auditory sub-bands based on the signal energy and based on sound output sensitivity of an against-the-ear audio device,
• determine a plurality of gain lookup tables, based on a hearing profile of a user of the against-the-ear audio device, wherein each gain lookup table outputs gain as a function of in-ear sound pressure level, SPL, in a sub-band, and
• determine a plurality of sub-band gains that are to be applied to the input audio signal, based on the determined SPL and using a selected one of the plurality of gain lookup tables that is selected based on audio content of the input audio signal.