Audio signal correction and calibration for a room environment

1. A method, comprising:

processing an audio signal generated within a particular room environment to create an original frequency response based on the audio signal;

identifying a target sub-region of the frequency response which has a predetermined area percentage of a total area under a curve generated by the frequency response;

creating at least one filter to adjust the frequency response; and

applying the at least one filter to the audio signal.

2. The method of claim 1 , further comprising:

calculating a frequency, a quality factor (Q) and a gain (G) of the target sub-region;

determining whether the Q is greater than a predefined Q threshold and whether the gain is less than a predefined G threshold; and

if the Q is greater than the predefined Q threshold and the G is less than the predefined G threshold then determining that the target sub-region is a narrow energy region.

3. The method of claim 2 , wherein if the target sub-region is determined to be a narrow energy region then performing an operation on the target sub-region to create a new flattened sub-region.

4. The method of claim 3 , further comprising:

creating a filter based on a new frequency, Q value and G value of the flattened sub-region.

5. The method of claim 4 , further comprising:

creating a new frequency response based on the new target sub-region and the corresponding filter.

6. The method of claim 5 , further comprising:

subtracting the original frequency response from the new frequency response.

7. The method of claim 2 , wherein the predefined Q threshold is 10 and the predefined G threshold is 0.5.

8. An apparatus, comprising:

a memory; and

a processor configured to

process an audio signal generated within a particular room environment to create an original frequency response based on the audio signal,

identify a target sub-region of the frequency response which has a predetermined area percentage of a total area under a curve generated by the frequency response,

create at least one filter to adjust the frequency response, and

apply the at least one filter to the audio signal.

9. The apparatus of claim 8 , wherein the processor is further configured to

calculate a frequency, a quality factor (Q) and a gain (G) of the target sub-region,

determine whether the Q is greater than a predefined Q threshold and whether the gain is less than a predefined G threshold, and

if the Q is greater than the predefined Q threshold and the G is less than the predefined G threshold then determine that the target sub-region is a narrow energy region.

10. The apparatus of claim 9 , wherein if the target sub-region is determined to be a narrow energy region then the processor is configured to perform an operation on the target sub-region to create a new flattened sub-region.

11. The apparatus of claim 10 , wherein the filter is also configured to create a filter based on a new frequency, Q value and G value of the flattened sub-region.

12. The apparatus of claim 11 , wherein the processor is also configured to create a new frequency response based on the new target sub-region and the corresponding filter.

13. The apparatus of claim 12 , wherein the processor is also configured to subtract the original frequency response from the new frequency response.

14. The apparatus of claim 9 , wherein the predefined Q threshold is 10 and the predefined G threshold is 0.5.

15. A non-transitory computer readable storage medium comprising instruction that when read by a processor perform:

processing an audio signal generated within a particular room environment to create an original frequency response based on the audio signal;

identifying a target sub-region of the frequency response which has a predetermined area percentage of a total area under a curve generated by the frequency response;

creating at least one filter to adjust the frequency response; and

applying the at least one filter to the audio signal.

16. The non-transitory computer readable storage medium of claim 15 , wherein the processor is further configured to perform:

calculating a frequency, a quality factor (Q) and a gain (G) of the target sub-region;

determining whether the Q is greater than a predefined Q threshold and whether the gain is less than a predefined G threshold; and

if the Q is greater than the predefined Q threshold and the G is less than the predefined G threshold then determining that the target sub-region is a narrow energy region.

17. The non-transitory computer readable storage medium of claim 16 , wherein if the target sub-region is determined to be a narrow energy region then performing an operation on the target sub-region to create a new flattened sub-region.

18. The non-transitory computer readable storage medium of claim 17 , wherein the processor is further configured to perform:

creating a filter based on a new frequency, Q value and G value of the flattened sub-region.

19. The non-transitory computer readable storage medium of claim 18 , wherein the processor is further configured to perform:

creating a new frequency response based on the new target sub-region and the corresponding filter.

20. The non-transitory computer readable storage medium of claim 19 , wherein the processor is further configured to perform:

subtracting the original frequency response from the new frequency response, and wherein the predefined Q threshold is 10 and the predefined G threshold is 0.5.