A question in the first unit of Physics in the second year of junior high school What are the applic

Listen to the sound to distinguish different people and different musical instruments (the timbre is mainly determined by the material of the emitting body, and all the sounds that are produced differently depending on the material).

Smart toys. Through voice recognition technology, we can talk to smart dolls, give commands to toys with voice, let them complete some simple tasks, and even make electronic watchdogs with voice lock functions. Smart toys have great market potential, and the key is to reduce the ** of voice chips.

"Nisen Reflecting the Moon" is played with different instruments.

For example, you can identify who he is without looking at you.

It's simple, I don't know, it's not what you're proud of.

Huh .

Hehe, a lot. At the meeting, we can know what is going on without looking at what instrument is playing. It's because of the difference in timbre, so we can tell the difference!

There is a kind of lock that is distinguished by the timbre of the person.

Timbre is determined by factors such as the material, structure, and vibration pattern of the embody.

The timbre depends on the emitter itself, and the timbre of the Lu sound is different depending on the vibration of the emitter. Timbre is the basis for us to distinguish various sounds, regardless of pitch and loudness, even if different instruments produce sounds of the same pitch and loudness, we can distinguish them, this is due to the difference in timbre.

Timbre refers to the sound quality of the instrument or voice, this is the ** timbre, marked is the instrument or voice, and there should be nothing wrong with the vocals or instrumentals. Timbre is divided into music and noise.

The material of the sounding body, its properties. Subtle effects also include air humidity and temperature.

These result in differences in fundamental frequencies and primary and multiple harmonics, resulting in a different timbre as a whole.

(1) Fill some beer bottles with water of different heights, and place them in order of height. If you knock from a bottle with less water to a bottle with more water, the sound will be from high to low; If you blow from a bottle with less water to a bottle with more water, the sound will be from low to high. (Knock:.)

the shaking of the water; Blowing: the vibration of the air).

2) Press a steel ruler against the tabletop with one end sticking out of the table. Dial the ruler and listen to the sound it makes, noting how fast the ruler vibrates. Change the length of the ruler protruding from the table and toggle it again.

Compare how fast and slow the ruler vibrates and the pitch of the sound in both cases. (The higher the frequency, the higher the pitch).

3) You can choose a rubber band for experiments (change the length of the rubber band to toggle and observe the frequency of vibration and the tone of the sound).

Put the ruler on the table, and move the ruler to make a sound, and when the sound has not stopped, you can find that there is no sound, which indicates that the sound needs to vibrate.

It illustrates the need for vibration to be sounded.

Distinguish the raw and ripe tones of watermelon.

Distinguish the quality of the porcelain bowl timbre.

Railroad workers knock on the railroad and check the tone.

How to determine the tone and timbre According to the actual situation, the same substance (ripe or immature watermelon, railway, etc.) to judge the tone, their timbre is determined by itself, will not change, and different parts of the material will be different, the timbre will be different.

Timbre, different objects make sounds of different timbre. For example, you can knock out the sound of do with a pot, and you can also knock out the sound of do with a bowl, and the tone they knock out is do, but the timbre is different.

If the intensity of the knock is certain, it is the timbre (**content: the timbre of the emitter is related to the object itself), if the intensity of the knock changes (it can only be said that the question is incomplete), the timbre should still be selected, but it still has a small relationship with the tone (we have done this question as a short-answer question, and my answer at that time was discussed on a case-by-case basis, and I did it correctly).

It's okay.

You don't have to do too much physics, it's key to understand it.

There is also a good listening in class (basic).

It's density, it's enough.