Even googling it, it doesn’t make sense. I know it’s about sound that can’t be heard but….???
In: 1
The human ear can only consciously register sounds from 20 vibrations a second (low pitch) and 20,000 vibrations per second (high pitch) anything lower is considered infrasonic and anything higher is ultrasonic. Just like for colors, if it’s outside the upper wavelength of light we can see it’s ultraviolet if it’s outside the lower wavelength it’s infrared.
Subsonic is something entirely different. Sound can’t be subsonic as the speed of sound through air is a set value (it changes with air density) that sound will always travel at. If something is subsonic it is travelling slower than the speed of sound through the air. When I walk that’s subsonic motion. Something travelling faster than the speed of sound is supersonic. Most bullets are supersonic.
Now where you may be confused is with speakers. Some speakers have a limit they call a subsonic filter. Basically every speaker has a range of frequencies it can produce. Many don’t bother going below 30 or 40 vibrations a second as the tone is so low it will get lost in the other music. However if the recording equipment is high enough quality on the original track, the speaker could try to play below that and it will end up messing with the other sounds it’s trying to produce. So a subsonic filter will cut out frequencies below a certain point say 50 vibrations a second.
Latest Answers