pipe drone, mid pitch, long, warning call, alarm

drone, disturbing, tonal, dark, deep

drone, mysterious, space, humming

drone, nervous, suspenseful, low, hum, buzz

horn, distant, large space, drone, low, groan 01

drone, steady, low, deep, cold

drone, hum, low, deep, suspenseful

air pipe, hum, whoosh, short, fading out

drone, hum, tension, low, steady, echo

drone, eerie, voice, opening up, suspenseful

horn, scary, uneasy, low, hum, ambience

drone, light flutter, steady, low, deep

horn, distant, large space, drone, low, groan 02

horn, distant, large space, drone, low, groan, space

cave aeration, wind, air, eerie

drone, soft, steady, hum

eerie voice, suspenseful, whistle, resonant, long, fading out

drone, voice, fading in, fading out, steady

soundscape, drone, scary, dark, hum, low, large space, reverb

drone, underwater, dark, voices

drone, eerie, sine, distorted, rumble, steady

cold wind, very large space, hum, noise

drone, slightly fluttering, steady, mysterious, cold, dark

hum, drone, low, uneasy, scary, large space, eerie, space

drone, suspenseful, tension, low, steady, echo

drone, loud, large space, siren, disturbing

soundscape, drone, dark, scary, high, large space, reverb

eerie voice, scary, resonant, long, fading out

drone, scary, pulsating, synth

cave hum, tonal, eerie, creature humming, call

siren, call, scary, large space, reverb, warning