Second, the speaker

Speaker is an electro-acoustic conversion element, which converts sound electrical signals into sound. From the development history, there are various speakers, such as electric speakers, electromagnetic speakers (that is, reed speakers), crystal speakers, electrostatic speakers and so on.

The principle of electric loudspeaker is that the coil of AC signal moves in the magnetic field, which makes the diaphragm connected with the voice coil vibrate, thus involving the vibration of the paper basin, and then transmits sound waves through the air medium.

The electromagnetic loudspeaker generates an alternating magnetic field through a coil with an alternating signal, attracting and repelling the magnetic sheet, causing the vibration of the diaphragm and the paper basin, and then transmitting sound through the air medium, thus generating sound.

The crystal loudspeaker produces sound through the electrostrictive effect of the crystal piece, which makes the diaphragm vibrate, and then spreads the sound through the air medium.

The sound produced by electrostatic speaker is based on the attraction and repulsion effect of electrostatic accumulation, which makes the diaphragm vibrate and then spreads the sound through the air medium.

Among these speakers, except the electric speaker, other speakers were eliminated because of their narrow frequency range and low power of radiating sound. The other electric speakers are widely used because their radiation frequency range can reach the whole audio frequency range and their sound power can be very high (high-power speakers can be made in different frequency bands, and full-frequency sound can be formed by combining sound production methods).

Supplement: It's not just paper pots that make sounds. After several magnetic induction transformations. For example, the paper basin of a small earphone is very thin and small, but it can still make a sound. It's all made of magnetic induction. Nowadays, paper pots are not only made of paper, but also made of metal and ceramics. Of course, the best effect is titanium, which is expensive. I know about it, but I don't understand.

Responder: damo 009- Magician Level 412-1416: 43.

Speaker is an electro-acoustic conversion element, which converts sound electrical signals into sound. From the development history, there are various speakers, such as electric speakers, electromagnetic speakers (that is, reed speakers), crystal speakers, electrostatic speakers and so on.

The principle of electric loudspeaker is that the coil of AC signal moves in the magnetic field, which makes the diaphragm connected with the voice coil vibrate, thus involving the vibration of the paper basin, and then transmits sound waves through the air medium.

The electromagnetic loudspeaker generates an alternating magnetic field through a coil with an alternating signal, attracting and repelling the magnetic sheet, causing the vibration of the diaphragm and the paper basin, and then transmitting sound through the air medium, thus generating sound.

The crystal loudspeaker produces sound through the electrostrictive effect of the crystal piece, which makes the diaphragm vibrate, and then spreads the sound through the air medium.

The sound produced by electrostatic speaker is based on the attraction and repulsion effect of electrostatic accumulation, which makes the diaphragm vibrate and then spreads the sound through the air medium.

Among these speakers, except the electric speaker, other speakers were eliminated because of their narrow frequency range and low power of radiating sound. The other electric speakers are widely used because their radiation frequency range can reach the whole audio frequency range and their sound power can be very high (high-power speakers can be made in different frequency bands, and full-frequency sound can be formed by combining sound production methods).

Supplement: It's not just paper pots that make sounds. After several magnetic induction transformations. For example, the paper basin of a small earphone is very thin and small, but it can still make a sound. It's all made of magnetic induction. Nowadays, paper pots are not only made of paper, but also made of metal and ceramics. Of course, the best effect is titanium, which is expensive. I know about it, but I don't understand.