Mapping positions of devices using audio

摘要

Disclosed are methods and systems for determining distance between two or more mobile devices utilizing a sound emitted from each device such as a chirp. Each device may determine or receive an indication of a time reference for each instance the device emits or detects a chirp. Utilizing the time reference data, the distance between the two or more devices may be determined assuming the sound travels at a constant speed of 340.29 m/s. Techniques for disambiguating orientation of the devices relative to one another rare also disclosed.

主权项

1. A system, comprising:
a first mobile device configured to:
emit a first chirp from the first mobile device;receive a first indication of the first chirp at a first time reference;receive a first audio signal;receive a second indication of a second chirp from a second mobile device at a second time reference within the first audio signal;obtain an indication of a first distance between the first mobile device and the second mobile device based on the first time reference, the second time reference, a third time reference, and a fourth time reference, wherein the third time reference corresponds to a time at which the second mobile device emits the second chirp and the fourth time reference corresponds to a time at which the second mobile device receives the first chirp.