someone shared the 1997 "Whistle" recording in a discord and i cannot get it out of my head

a guy in a deep-sea oddities discord dropped this clip last night, said it's the NOAA "Whistle." everyone calls it a whistle but lmao it is NOT a whistle, it's this low undulating moan that just wobbles on one frequency. genuinely sat there at 2am with the lights on. so the deal: eastern Pacific au……