2nd grade

We call sound to our mind’s interpretation of the sound waves, so silence is absence of sounds. However, there is no possibility of reaching the complete silence and, therefore, we will accept the relative silence as the maximum reduction of noise. On the other hand, there are different ways to define noise. For example, from the psychological point of view, we call noise to whatever sound disturbing us, which is a very subjective definition, so regarding music, we will call noise to a sound which pitch is not perfectly determined.