High frequency signal:
-
White noise
-
Morse code transmission
-
SOS signal transmission, Morse code
-
Low frequency electronic signal
-
High frequency squeak
-
Electronic signal, energy buildup
-
Low-frequency rumble, high-frequency squeak
-
Morse code, welcome
-
Interference Broadcasting
-
Radio noise
-
Brown noise
-
Transfer, Morse code, reception
★★★★★