The working principle of electric speakers, the bunker

Guide: The speaker, popularly speaking, is the speaker. Some people may think, "The speaker is so grounded, I play every day, so easy", then the question comes, what is the working principle of the speaker? Not everyone who can use the speaker can Answer it, then let's follow the Xiaobian to learn how the speaker works in the bunker~~~

First, the working principle of the speaker - - Introduction

The speaker is an electro-acoustic transducing device, which can convert electrical signals into sound signals, and is now widely used in audio, computer, television, mobile phones and other devices with playback functions.

Second, the working principle of the speaker - - classification

Speakers can be divided into built-in speakers and external speakers; according to the switching mechanism and structure can be divided into moving coil (electric) speakers, capacitive speakers, piezoelectric speakers, electromagnetic speakers, ionized speakers and pneumatic speakers According to the sound radiation material can be divided into paper cone speaker, horn speaker, dome-shaped speaker; according to the operating frequency can be divided into woofer, mid-range speaker, tweeter; can also press the shape of the cone, voice coil impedance, etc. Wait to classify it. Among the speakers, the most widely used ones are electric speakers , and the electric speakers are divided into three types: paper cone, dome, and horn. Then we will introduce the structure and working principle separately.

Third, the working principle of the speaker - - paper cone

The paper cone speaker is composed of three parts. The first part is a magnetic circuit system composed of a permanent magnet and a soft iron core. The second part is a paper cone (vibration film), a centering piece, a voice coil and a dust cover. The vibration system consists of the third part is an auxiliary system consisting of a basin frame, a wiring board and a crimping edge. As shown below.

When an audio current passes through the voice coil of the speaker, the voice coil generates a changing magnetic field under the action of current, and the permanent magnet generates a constant magnetic field, and the two magnetic fields interact to make the voice coil axially vibrate (vertical In the direction of the current in the voice coil, the vibration of the voice coil causes the cone to vibrate, causing the vibration surface of the air to make a sound. The greater the audio current passing through the voice coil, the greater the magnetic field force, the greater the vibration amplitude of the paper cone, and the louder the sound.

Fourth, the working principle of the speaker - - dome shape

The part of the speaker that emits the bass is mainly at the edge of the diaphragm, and the part that emits the treble is mainly in the center of the diaphragm. Therefore, the bass speaker with a large aperture has a good bass effect, and is generally used as a mid-woofer unit. Shaped speakers are used in tweeters. The structure of the dome-shaped speaker is shown in the figure below.

It differs from the paper cone speaker in that its vibrating body is not conical, but a vibrating plate that is hemispherical. It works like a cone speaker.

Fifth, the working principle of the speaker - - horn

The horn loudspeaker consists of two parts, one is a vibration system consisting of a cone (vibration membrane), a centering piece, a voice coil and a dust cover, and the other part is a horn. The working principle is similar to that of a paper cone speaker, except that his vibrating body is not a cone, but a dome-shaped diaphragm. The vibration of the diaphragm radiates sound waves into the air through a horn (two reflections). Its high frequency and large volume are often used for outdoor and square sound reinforcement.

Xiaobian is only a part of the introduction of the working principle of the speaker. The following are some articles about the working principle of the speaker. Parents can pay attention to it~~~

1, the working principle of the speaker

2. Introduction to the working principle of six kinds of speakers

3, a disassembly will be clear! Conical woofer violent disassembly

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