0:02
Morse code with a weak signal, "alert"
0:01
Morse code, letter "j"
0:01
Morse code with a weak signal, "erase"
0:01
Morse code, letter, "c"
0:01
Morse code with a weak signal, letter "z"
0:01
Morse code with a weak signal, short beep
0:01
Morse code with a weak signal, letter "x"
0:02
Morse code, call up
0:01
Morse code, letter, "d"
0:01
Morse code with a weak signal, number nine
0:01
Morse code, letter, "e"
0:01
Morse code, letter "g"
0:01
Morse code, "good job"
0:01
Morse code, "good bye"
0:01
Morse code, "erase"
0:03
Morse code, emergency sos, twice
0:01
Morse code, end message
0:03
Machine communication beeps.
0:06
Transmission distortion, signal, ascend and descend
0:13
Mid pitch tone quickly modulating with digital static in the background.