Already happened a few times to me that I could distinctly hear a drone's buzzing but couldn't pinpoint where it was because it was between 50 to 100 meters hig

Already happened a few times to me that I could distinctly hear a drone's buzzing but couldn't pinpoint where it was because it was between 50 to 100 meters high and some 50 meters away. It was just an annoying sound because it was a quiet, non windy day.