Noise is unpleasant, while music, with its rich quality, is pleasant to hear.

A sound produced by multiple frequencies is described as a note, often perceived as pleasant due to its complexity.

A sound of single frequency is called a tone, characterized by its purity and absence of overtones or harmonics.

The quality, or timbre, distinguishes sounds with the same pitch and loudness, with rich quality being more pleasant.

Hitting a table harder increases the force applied, resulting in a larger amplitude sound wave with greater energy, which is perceived as a louder sound.