Pitch represents the frequency of sound, which is one of the three main subjective attributes of sound, namely volume (loudness), tone and timbre (also called timbre). Indicates the degree to which human hearing can distinguish the pitch of a sound. Tone is mainly determined by the frequency of sound and also related to the intensity of sound. For pure tone with a certain intensity, the tone rises and falls with the rise and fall of frequency; For a certain frequency pure tone, the tone of low-frequency pure tone decreases with the increase of sound intensity, while the tone of high-frequency pure tone increases with the increase of sound intensity.
Extended data:
Tone analysis: Tone is also related to the structure of vocal body, because the structure of vocal body affects the frequency of sound. Generally speaking, 2000? The tone of low-frequency pure tone below Hz decreases with the increase of loudness, and the tone of high-frequency pure tone above 3000 Hz increases with the increase of loudness. Tone can be judged quantitatively. The unit of tone is called beauty (mel): based on pure tone with frequency of 1000 Hz and sound pressure level of 40 dB, it is called 1000 beauty. Other pure tones sound twice as high as 2000 beauty and twice as low as 500 beauty, and so on, and the sound level in the whole audible frequency range can be established. The relationship between pure tone with sound pressure level of 40 dB and the frequency obtained in this way is shown in the following table:
High notes: light, short and thin; Bass: heavy, long and thick. Tone is also related to the duration of sound. Very short (millisecond or shorter) pure tone, you can only hear a "click" like a blow or snapping your fingers, but you can't feel the tone. The duration increases from 10 millisecond to 50 milliseconds, which sounds like the tone changes continuously from low to high. After more than 50 milliseconds, the tone is stable. The tone of musical tone (polyphony) is complex, which can generally be considered as mainly determined by the frequency of pitch.
References:
Tone-Baidu Encyclopedia