Patent ID: 9693164
Date: 2017-06-27
CPC Classifications: G06F,H04R,H04S

Claim:
1. A method comprising: receiving, via a processing device, data representing a recorded audio content that was recorded by a networked microphone device (NMD) upon output of the audio content via a first audio driver and a second audio driver of one or more playback devices, wherein the first audio driver and the second audio driver are positioned at a known distance apart in a given azimuthal plane; identifying, within an impulse response of the recorded audio content corresponding to a particular point-in-time, (i) a first reference point corresponding to a particular frequency of the audio content played by the first audio driver at the particular point-in-time and (ii) a second reference point corresponding to the particular frequency of the audio content played by the second audio driver at the particular point-in-time; identifying a direction of the NMD relative to a center point of the first audio driver and the second audio driver in the given azimuthal plane, wherein identifying the direction of the NMD comprises determining a phase offset between the first audio driver and the second audio driver and determining a range of possible azimuthal angles between the NMD and the center point, the range of possible angles dependent upon (i) the known distance between the first audio driver and the second audio driver and (ii) the determined phase offset between the first audio driver and the second audio driver; and causing the one or more playback devices to adjust calibration based on the identified direction of the NMD relative to the center point of the first audio driver and the second audio driver in the given azimuthal plane.