Height, timbre and intensity are the physiological qualities of sound and characterize the sound waves present in our daily lives.
Some quantities are very important in the characterization of sound and are called physiological sound qualities . These qualities are related to the sensation that sound produces in the human ear and are: pitch, intensity and timbre .
This quality allows the human being to differentiate and classify sounds into bass and treble . This is done from the frequency of the sound . Thus, the higher the frequency of a sound wave, the higher the sound. Men generally have a deeper voice, that is, a “thicker” voice. Women, in turn, have a higher voice , that is, thinner.
Thus, we can conclude that the male voice has a lower frequency of vibration than the female voice. In technical parlance, the high sound is high and the low sound is low, but, in everyday life, it is very common to see people using the term high and low to refer to another characteristic of sound: intensity. However, these denominations should be avoided, as they are misused.
It is the physiological quality that is related to the amount of energy carried by the sound and that allows the classification of sounds into weak or strong . Sound intensity is caused by the pressure that the sound wave causes on the ear or on any other instrument for measuring sound intensity, such as a dosimeter .and the decibel meter .
The greater the pressure that the sound wave exerts on the ear, the more intense the sound perceived or captured by any of these measuring devices.
This quality of sound gives the human ear the possibility of differentiating two sounds that have the same pitch and intensity, but emitted by totally different sounding instruments, such as a flute and a cavaquinho.