Why does our voice sound deeper when we slow-mo but sound more high-pitched when we fast forward?
In: Physics
Because that’s how sound works.
Sound is a wave that travels through a medium i.e a substance, object. It travels by pushing the atoms back and forth. Your ear has a drum that moves forward and backward when air around it moves back and forth then this motion is transferred to a couple of bones and special sensors and then your brain which registers it as hearing. Sound waves, as every wave, has some differentiating properties. Like how far, harsh they push the atoms. This is the amplitude of the sound wave. We hear it as the loudness of it. The another property is how often they do it so. This is the frequency of a wave. We hear this as the pitch.
If something vibrates air slowly, then you hear a low-pitched i.e. deep sound. If something vibrates the air fast then you hear a high-pitched sound.
By slowing down a recording you increase the amount of time that the recorded sound to be created which decreases the frequency of the actual sound. You hear this new sound wave as a deeper sound.
Latest Answers