How could a screech be infrasonic? Infrasonic refers to pitches below the range of human hearing, <20 Hz. It's the pitches that are slower than most subwoofers can reproduce. If you could experience a reproduction of an infrasonic tone you would feel it in your body, but not hear it.

How could a screech be infrasonic? Infrasonic refers to pitches below the range of human hearing, <20 Hz. It's the pitches that are slower what most subwoofers can reproduce. If you could experience a reproduction of an infrasonic tone you would feel it in your body, but not hear it.