Devices, systems and methods of informational signal synchronization using a reference signal

A computing device comprising:

• a memory;
• a communications interface configured to communicate with a first sensor device and a second sensor device;
• a processor interconnected with the memory and the communications interface, the processor configured to:
• obtain, from the first sensor device, a first sensor recording, the first sensor recording including (i) a first data track representing a first informational signal as detected by the first sensor device and (ii) a first reference track representing a reference signal as detected by the first sensor device;
• obtain, from the second sensor device, a second sensor recording, the second sensor recording including (i) a second data track representing a second informational signal as detected by the second sensor device and (ii) a second reference track representing the reference signal as detected by the second sensor device;
• determine a time shift between the reference signal as recorded by the first sensor and the reference signal as recorded by the second sensor;
• and
• apply the determined time shift to the second informational signal to time-align the first informational signal and the second informational signal.

A sensor device comprising:

• an informational signal sensor configured to detect an informational signal;
• a reference signal sensor comprising (i) a frequency modulated (FM) radio receiver configured to detect an FM radio signal as a reference signal or (ii) an optical sensor configured to detect an optical signal as the reference signal;
• a memory;
• and
• a processor interconnected with the informational signal sensor, the reference signal sensor and the memory, the processor configured to:
• generate informational data representing the informational signal and record the informational data in an informational track of a sensor recording;
• generate reference data representing the reference signal and record the reference data in a reference track of the sensor recording, wherein the informational track and the reference track are time-aligned relative to one another;
• and
• store the sensor recording locally in the memory.