Unknown 462.610-462.625

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462.610-462.725 Unknown
Frequencies 462.61 MHz,462.725 MHz
Frequency Range 462.61 MHz - 462.725 MHz
Mode NFM
Modulation Voice and Data
Bandwidth 6 kHz
Location United States
Short Description Found this while scanning FRS/GMRS channels. Weird noises with altitude announcements. Possibly from a drone or model airplane as there was a AMA Model airplane show going on a few miles from me
I/Q Raw Recording
Audio Sample

The altitude never got above 2500 feet and the signal lasted about 20 minutes. Heard this several times over a 4 day period. Possible FLARM hooked up to a drone???