The next aspect that we will bring up that is a characteristic of sound is tonal quality. This refers to the relationship between pitches and usually to the specific system of pitch relationships that refer to a central pitch or tone. Tonal quality is also the characteristic of sound that allows the ear to distinguish between tones created by different kinds of musical instruments even if the sound waves are identical in amplitude and frequency. Tones are sound waves that evokes a sensation of pitch while overtones are the additional components in a wave that vibrate in simple multiples of one base frequency. Sound waves and also the characteristics of sound mostly have to do with one area of study, the physics of musical instruments.
Instruments play a key role in all of today's societies.
Instruments are easily described as objects that vibrate air that were constructed to produce with a certain frequency and pitch. Two examples are the flute, synthesizer, and the clarinet.