Mind gives many effect on sound. This affect is used in many ways to make music, or video better. The most famous using this psychoacoustics is cocktail party effect, masking, and mp3 format.
First is cocktail party effect. Imagine you are at the party. You are just enjoying the party. Suddenly, someone call your name. You might hear that call. Have you ever met this situation? This is cocktail party effect. Even if you are at the noisy place, you can hear what you focus. When you listen to EDM, you can separate kick drum, bass guitar, or hi-hat in the music.
Second thing is masking effect. Definition of masking effect is that low frequency sound make hard to listen high frequency sound. This because of the structure of the ear. So, people can’t high pitch sound when low sound played.
The last thing is mp3 format. The original sound recording format is usually WAVE ( .wav) format. This is really high memory format. So many people use mp3 format to listen to music. However, most of them don’t know how make wave to mp3. When mp3 encoder makes wave to mp3, it use masking effect and frequency response. First, cut too high, and too low frequency that people can’t hear, because people can hear only between 20 to 20000 Hz. And at next step, program analyze the music and cut the unheard sound that is based on masking effect. This is how mp3 files is made.
Mind and sound have really close relationship. Without psychology, we can’t make music, mix music, and do mastering music. If you think those effects have little importance, you have to fix you thinking.
The Sound 