Morse code transmission: Listen & Download Morse code transmission .mp3 Error! Change your browser, please! ⇓ Download SOS signal transmission, Morse code ⚠ Low frequency electronic signal ⚠ Low-frequency rumble, high-frequency squeak ⚠ Radio noise ⚠ White noise ⚠ Interference Broadcasting ⚠ Brown noise ⚠ Low frequency pulsing and humming signal ⚠ Energy buildup, Electronic signal ⚠ Pink noise ⚠ Location alert, Radar ⚠ Geiger counter ⚠ ★★★★★