Room tone - bathroom shower - light dribble

Room tone - bathroom shower - strong spray

Room tone - boiler room with rattling boiler tank

Room tone - underground corridor - low rumble

Room tone - kitchen with buzzing fridge

Room tone - bathroom hum

Room tone - store with neon sign buzz

Room tone - factory with machinery idling

Room tone - recording studio - silent noise floor

Room tone - air vent - light hum

Room tone - basement leaking in the rain

Room tone - elevator moving between floors

Room tone - fire in living room fireplace

Room tone - server room with whirring fans (High)

Room tone - server room with whirring fans (Low)

Room tone - air vent - deep howling drone

Room tone - air vent - deep, subby rumble

Room tone - air vent - low rumble

Room tone - air vent hum & subtle rattle

Commercial airplane interior ambience

"Cabin crew take your seats" - plane captain announcement