Ultrasound

Ultrasounds are a game mechanic in Several Nights at Fierce's.

The office table has three machines, each of which has two buttons on them; one for Smoke and one for Light. The left and the right machines have computers on them. The left screen has a music note on it. Clicking this music note causes ultrasounds to play for 10 seconds; the player can't hear them however.

Advantages

 * Stops The Doll from attacking the player.
 * Lasts for 10 seconds, which is more then the time The Doll stays in the office.

Disadvantages

 * Drains 2 power each use. If spammed, this can lead to a power-out very quickly.