The S T F Is a Real Time Noise Controller

S t f is a hand held controller that toggles vibrations in the air. You have to tune it to whoever you want to use it on, and it matches their vocal chords. A long range microphone detects what's coming out of their mouth,. It's like lazer baste. So it can get there before the sound waves reach you., looking in like their nothing whatever and then shoots an equivalent sound back at em.