What is the physical meaning of timbre? What are the four physical properties of tone

"Timbre" is a concept mentioned in junior high school physics textbooks, and it can also be said that sound waves can be drawn as waveforms in a two-digit coordinate system, or they can be regarded as a function of [time] of the distance of a substance in a medium from the center position. Ordinary sound waves are not necessarily composed of vibrations of a single frequency, but can be decomposed into a series of superposition of sine waves of different frequencies, so the frequency and amplitude mentioned in junior high school textbooks usually refer to the frequency and amplitude of sine waves in the low frequency band, and timbre generally refers to the characteristics of the high-frequency part that is not easy to describe. At the same time, you can directly see what the different timbres of different musical instruments mean?

**。As for "sound waves can be regarded as a function of time", that is a description of the acoustic signal in the time domain, and in fact, it can also be transformed to obtain the characteristics of the acoustic signal in the frequency domain, or the characteristics of the spectrum over time, the latter two are easier to understand the concepts of frequency and timbre. The combination of different frequency components in the frequency domain is generally referred to as "timbre", which is equivalent to the higher harmonics other than the fundamental frequency for the sound, although there are also some sounds that do not have a fixed fundamental frequency (such as percussion instruments without a fixed pitch).

Of course, the sound produced by natural instruments and sound systems that we hear is not only a reference frequency, but also rich harmonics, and it is the spectrometer that only emits the reference sound. The violin and the piano emit the same frequency, and the distribution of their harmonics is different, which constitutes the difference in timbre, and the sound equipment is the same. For example, there are more even harmonic components of the gall machine, we say that the timbre is warm, and the class D amplifier has more odd harmonics, the timbre is cold, and the definition is so, not metaphysics, nor the timbre of some friends can not be defined.

Timbre, also known as sound, is the characteristic of the sound that is perceived by the auditory sense. There is no timbre problem in pure tone, and there is a difference in timbre in polyphony. The timbre is mainly determined by the frequency spectrum of the sound, that is, the composition of the fundamental tone and the sub-harmonics, and also has a relationship with the waveform, sound pressure and the temporal characteristics of the sound, such as the gramophone.

The record is reversed, and although the spectrum of the sound remains the same, the timbre changes significantly. This shows that the timbre is largely related to the various overtones.

Amplitude at the beginning and at the end.

There is a relationship between the characteristics of the rise and the fall. Timbre is of great significance to the development of electric musical instruments. At present, it is based on the frequency spectrum of the sound of various musical instruments, the relative intensity of the fundamental tone and the secondary harmonic tones that are simulated by electroacoustic methods to make electric musical instruments. <>

Timbre refers to the sensory properties of a sound. The frequency determines the pitch of the sound, and the amplitude determines the loudness of the sound, but we can still distinguish the sound emitted by different objects by the timbre, and the materials and structures of different generators are different, and the timbre of the sound is different. Timbre is the characteristic of sound, and according to different timbres, even in the same pitch and sound intensity, it is possible to distinguish between different instruments or human voices.

The same volume and sound with different timbres is like the same color and brightness with different hues. The difference in timbre depends on the different overtones, and the sound produced by each instrument, different people, and all objects that can make sounds, in addition to one fundamental tone, is accompanied by many overtones of different frequencies, and it is these overtones that determine their different timbres, so that people can distinguish the sounds produced by different instruments or even different people. Each person has a different timbre even when they speak, so they can be distinguished by their voices.

1. Pitch - proportional to frequency, the higher the frequency, the higher the tone. Pitch intensity – related to amplitude. In general, the stronger the airflow, the louder the sound.

Pitch length – it's about time. Sound quality - determined by many factors, including the material of the articulation body, the method of pronunciation of the articulation body, and the shape of the resonance cavity of the articulating body.

2. (1) Loudness: The volume of the sound (commonly known as the volume) that people subjectively feel is determined by the "amplitude" and the distance between the person and the sound source, the greater the amplitude, the greater the loudness, and the smaller the distance between the person and the sound source, the greater the loudness. (Unit: dB dB).

3. (2) Tone: The height of the sound (treble, bass) is determined by the frequency, the higher the frequency, the higher the pitch (frequency unit Hz (Hertz), hertz [url, the human ear hearing range below 20 is called infrasound, and above 20000Hz is called ultrasound) For example, the sound of the low end or the sound of higher sound, such as thin strings.

4. (3) Timbre: also known as sound product, the waveform determines the timbre of the sound.

5. (4) Musical sound: a regular and pleasant sound. Noise:

From a physical point of view, the sound produced by the sound emitter vibrates irregularly; From the perspective of environmental protection, all sounds that interfere with people's normal work, study and rest, as well as sounds that interfere with the sounds that people want to hear.

6. (5) Tone, loudness, and timbre are the three main characteristics of musical sound, and people distinguish sounds according to them.

Pitch: Indicates the pitch of the voice. The pitch mainly depends on the frequency of the vibration of the sound source, and we can change its frequency by changing the characteristics of the emitter itself (such as length, tightness, size, amount, thickness), which can affect its pitch.

The human ear's perception of how high or low a sound is called pitch. Tone is mainly related to the frequency of sound waves. The higher the frequency of the sound waves, the higher the pitch.

Timbre and shout: Indicates the quality of the voice. Generally speaking. The sound emitted by different objects is different, for example, the sound of different people shouting is different, and their timbre is different.

Timbre is the characteristic that distinguishes people from two voices with the same loudness and the same tone, or the comprehensive response of the human ear to sound waves of various frequencies and intensities. Timbre is related to the vibrational waveform of the sound wave, or to the spectral structure of the sound.

The pitch of the voice is called pitch.

Tone definition: The faster an object vibrates, the higher the pitch of the sound it makes. The slower the vibration, the lower the pitch of the sound is one of the three main sail bystander properties of sound, namely volume, pitch, and timbre.

It indicates the degree to which a person's hearing can distinguish the tone of a sound. The pitch is mainly determined by the frequency of the sound, but also has to be closed with the intensity of the sound. For pure tonal oak of a certain intensity, the tone rises and falls with the rise and fall of frequency; The pitch of a certain frequency of pure tone and low frequency pure tone decreases with the increase of sound intensity, while the tone of high-frequency pure tone increases with the increase of intensity.

Tone Analysis: Pitch is mainly determined by the frequency of the sound. For pure tones of a certain intensity, the pitch rises and falls with the rise and fall of frequency; Pure tones of a certain frequency

Timbre refers to the sensory properties of sound. The pitch is determined by the frequency of the vibration of the sound emitter, and the magnitude of the loudness is determined by the amplitude of the vibrating of the sound emitter.

Timbre refers to the sensory properties of sound. The pitch is determined by the frequency of the vibration of the sound emitter, and the magnitude of the loudness is determined by the amplitude of the vibrating of the sound emitter, but the timbre of different sound emitters is different due to different materials and structures, so that we can distinguish different sound emitters through the difference in timbre, timbre is the characteristic of sound, according to different timbres, even in the case of the same pitch and the same sound intensity, we can also distinguish that it is produced by different instruments or people. Different timbres on the same loudness and tonal are like different luminosities for the same saturation and hue.

Timbre is determined by the nature of the articulatory body and the material.

Timbre is produced by vibration, so the indicators of vibration will determine the nature of the sound, for example, the base frequency of vibration determines the pitch of the sound. When an object vibrates, the frequency is a waveform, and this wave can always be decomposed into a series of superposition of sine waves of different frequencies, including a fundamental wave and many hundred harmonics, that is, it contains various frequency components and different timbres.

Timbre is the color of sound. But when we hear it, it's different. Some sounds will sound pleasant to you, but others will sound harsh and uncomfortable, and no one wants to listen to such sounds.

So, timbre should be divided into two categories: musical sound and noise.