The sound level is determined by the vibration frequency of the vocal body, and different frequencies determine different pitches. The higher the vibration frequency (Hz), the higher the sound, and vice versa. The pitch of sound is called pitch for short.

The tones used in music are generally between 16Hz and -7042Hz, which is slightly wider than the range contained in ordinary pianos. Tones with higher or lower pitch will lose their aesthetic significance, so they will not be used.

In music, sound level is the soul of the whole music, and the change of pitch often brings about the change of music image; If there is any inaccuracy in singing and playing, it will disturb the whole music.

The intensity of sound

The intensity of sound is determined by the vibration range (amplitude) of the speaker. Generally speaking, when sound is produced, the force used for vibration is large, and the amplitude of sound body vibration is large, so the sound is strong, and vice versa.

In music, the strength of sound will form a regular rhythm and beat stress, resulting in the basic rhythm of music, and different music styles will have different laws of strength; The expression of musical emotion can not be separated from the change of musical strength.