Source: Starfinder Core Rulebook p.356
Level Mystic 0; Technomancer 0
Casting Time 1 standard action
Range close (25 ft. + 5 ft./2 levels)
Effect illusory sounds
Duration 1 round/level (D)
Saving Throw Will disbelief; Spell Resistance no
You create a volume of sound that rises, falls, recedes, approaches, or remains fixed. You choose what type of sound this spell creates when casting it and cannot thereafter change the sound’s basic character.
The volume of sound created can produce as much noise as 20 normal humans. Thus, you can create shouting, singing, talking, marching, running, or walking sounds, as well as sounds of battle or small explosions. You can make noises that sound like machines, the general chatter of distant conversation, or the roar of an alien predator, but you can’t make specific sounds such as intelligible speech or the exact hum of a particular starship’s engines.