Pink noise:
-
SOS signal transmission, Morse code
-
High frequency pulsating electronic signal
-
Low frequency pulsing and humming signal
-
Low frequency electronic signal
-
High-frequency squeak, Low-frequency rumble
-
High frequency signal
-
Radio noise
-
Radar, location alert
-
Pink noise
-
High frequency squeak
-
Horrifying throbbing low-frequency rumble
-
Geiger counter
★★★★★