Why Does Audio Get Treble in Time-Lapse Videos?

When trying to save time on YouTube, sometimes videos 2 times faster we follow. We do this sometimes to study lessons faster, and sometimes to consume video content faster.

When we speed up the videos, together with the image the speaker’s voice also accelerates and the speaker’s voice sounds higher to us. What’s the connection between this speed boost and the treble?

First, let’s learn about sound waves.

Sound waves, in their simplest form, energy from one place to another It is a traveling wave. That is, these sound waves can propagate in liquids, solids and air.

periodic waves is in a continuous oscillating motion. Sound waves are also classified as periodic waves. It is possible to explain the movement of sound waves with an example. For example, when someone speaking into a microphone starts speaking causes vibrations in the microphone and these vibrations affect the air molecules. In this way, sound waves propagate in the air as a periodic wave. for people to hear provides.

An important property of sound waves is related to frequency.

Producing a meaningful sound The frequency of the sound is very important for Frequency also determines the pitch of the sound. How high a sound is is determined by its pitch. If the pitch of a voice is high the sound is so high It is possible. You can understand this issue better, girls have a higher pitch than boys and therefore their voices are sharper and higher-pitched.

Let’s listen to the first 11 seconds of Tarkan’s Kuzu Kuzu song as normal and the rest at x2 times:

https://www.youtube.com/watch?v=-hcC7C6vXlU

When we speed up the video by x2 We have raised the pitch of Tarkan’s voice and therefore sound to us it got louder.

So this is caused by the sound during acceleration. vibrations move faster and the frequency of the sound wave increases. As the frequency increases, the pitch also increases, and thus the sound reaches our ears. comes with a higher pitch.