White noise Just a flurry of noise that leaves you feeling like you need to adjust your antenna. 10 seconds of white noise. mp3 m4r ogg
DTMF: "notification sounds" A series of beeps and boops that spell out "notification sounds", like a phone dialing its way through each letter. 668434228466768637. mp3 m4r ogg
Sonar (WW2) - v2 A variation of the WW2-style submarine sonar, as often heard in Hollywood movies. mp3 m4r ogg
Sonar (multiple pitches) A sonar ping with frequency modulated tone re-created after a youtube video. Some say it's a submarine sonar, others say it's a surface vessel sonar, but ask an expert if you really want to know! mp3 m4r ogg
Pink noise Like a gentle rainfall on a tin roof, a soft sound that evelops you in a blanket of calmness. mp3 m4r ogg