Understand the audio circuit diagram in one article.Bar use audio sales

　　Sound refers to other sounds besides human language and music, including sounds of natural environment, sounds of animals, sounds of machines and tools, and various sounds made by human actions.

　　Audio probably includes a set of power amplifier, peripheral equipment (including compressor, effector, equalizer, VCD, DVD, etc.), speaker (speaker, speaker), mixer, microphone, display device, etc. Among them, speakers are sound output devices, speakers, subwoofers, and so on. There are three loudspeakers, high, low, and medium speakers in a speaker, but not necessarily three. The development history of technology can be divided into four stages: electron tubes, transistors, integrated circuits, and field effect transistors.

　　audio component

　　Audio equipment probably includes power amplifiers, peripherals (including compressors, effects, equalizers, exciters, etc.), speakers (speakers, speakers), mixers, sound sources (such as microphones, musical instruments, VCD, DVD) display devices Wait for it to add up to one set. Among them, speakers are sound output devices, speakers, subwoofers, etc. A speaker includes three types of speakers, high, low, and medium, but not necessarily three.

　　To know the principle of sound from speakers, we first need to understand how sound is transmitted. The transmission of sound requires a medium (vacuum cannot transmit sound); the sound space must rely on all gases, liquids, and solids as media to spread out. These substances as the transmission media are called media. It is like a water wave. If you throw a stone on a calm water surface, there will be a wave on the surface of the water, and then it will travel from the opposite shore to 4 weeks; sound waves are formed in this way. The frequency of sound waves is in the range of 20-20,000 Hz, which can be heard by the human ear; below or above this range, the human ear cannot hear it. The propagation mode of wave and sound wave is the same, and the human ear can hear sound only through the propagation of the medium. Sound waves can propagate in gas, solid, and liquid.

　　Now let’s talk about the working principle of speakers. A horn is a device that converts electrical signals into acoustic signals. It is composed of coils, magnets, and paper cones. The current (alternating current) of different sizes output by the amplifier moves the coil under the action of the magnetic field through the coil. The coil is connected to the paper cone to drive the paper cone to vibrate, and then the vibration of the paper cone pushes the air to produce sound.

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