Description: Fast pulses and frequency modulation

Description: Electronic gurgling that changes slowly

Description: Futuristic sound impulse, spaceship, UFO

Description: Powerful drone, massive data flow

Description: Continuous rolling as in a mine

Description: Drone chats in a box, repetitive sound

Description: Circular, continuous and static drone

Description: Spaceship alarm clock sound effect.

Description: Space signal sound effect.

Description: Outer space signals sound effect.