Interpolation of finite impulse response filters for generating sound fields

One or more non-transitory computer-readable media comprising instructions that, when executed by one or more processors, cause the one or more processors to perform the steps of:

• determining a target location in an environment;
• computing a first coherence value indicating a level of coherence between a first sub-band impulse response and a second sub-band impulse response for a first frequency sub-band, the first and second sub-band impulse responses being associated with corresponding locations that are proximate to the target location;
• combining the first and second sub-band impulse responses using non-linear interpolation when the first coherence value is below a coherence threshold or using linear interpolation when the first coherence value is equal to or above the coherence threshold to generate an estimated impulse response for the first frequency sub-band for the target location;
• generating, based at least on the estimated impulse response, a filter for a speaker;
• filtering, by the filter, an audio signal to generate a filtered audio signal;
• and
• causing the speaker to output the filtered audio signal.

A system comprising:

• a memory storing instructions;
• and
• a processor coupled to the memory that executes the instructions to perform steps comprising:
• determining a target location in an environment;
• computing a first coherence value indicating a level of coherence between a first sub-band impulse response and a second sub-band impulse response for a first frequency sub-band, the first and second sub-band impulse responses being associated with corresponding locations that are proximate to the target location;
• combining the first and second sub-band impulse responses using non-linear interpolation when the first coherence value is below a coherence threshold or using linear interpolation when the first coherence value is equal to or above the coherence threshold to generate an estimated impulse response for the first frequency sub-band for the target location;
• generating, based at least on the estimated impulse response, a filter for a speaker;
• filtering, by the filter, an audio signal to generate a filtered audio signal;
• and
• causing the speaker to output the filtered audio signal.