Microwave's signal (4)
I believe the answer is:
beep
(Other definitions for beep that I've seen before include "Electronic noise" , "Toot" , "Sound of pager" , "Sound of a horn" , "Short high-pitched sound from an electronic device" .)
I believe the answer is:
beep
(Other definitions for beep that I've seen before include "Electronic noise" , "Toot" , "Sound of pager" , "Sound of a horn" , "Short high-pitched sound from an electronic device" .)