What interface is audio in?

"audio in" is the audio input interface. "Audio in" means audio input. The "audio in" interface can input audio signals from computers, video recorders, etc., and play them through the built-in speakers, and can be connected to any supported audio device; usually a mini mini with a recording function Combination speakers all have this interface.

The operating environment of this tutorial: Windows 7 system, Dell G3 computer.

AUDIO IN means audio input, so "audio in" is the audio input interface, used to connect external audio sources, such as mp3, mobile phones, DVD players, TVs, etc.

The audio input interface can input audio signals from computers, video recorders, etc., and play them through the built-in speakers, and can be connected to any supported audio device. Usually mini combo speakers with recording function have this interface.

#The speaker is a transducer device that converts electrical signals into acoustic signals. The performance of the speaker has a great impact on the sound quality. The speaker is the weakest component in audio equipment, and it is also the most important component in terms of sound effects. Audio power uses electromagnetic, piezoelectric or electrostatic effects to cause its paper cone or diaphragm to vibrate and resonate (resonate) with the surrounding air to produce sound.

Similarly, there is the audio out port, which is the audio output interface. Audio can be connected to a power amplifier and external speakers through the audio output interface. Simply put, an audio interface is a device that connects microphones and other sound sources to your computer, acting as a bridge between analog and digital signals. Audio interfaces typically work with front-facing microphones, line inputs, and a range of other input devices.

Extended information:

Principle of speaker:

The speaker is composed of electromagnet, coil and speaker diaphragm. Speakers convert electrical frequency into sound. According to the principle of physics, when an electric current passes through a coil to generate an electromagnetic field, the direction of the magnetic field is the right-hand rule. Assume that the speaker plays the C tune with a frequency of 256Hz, that is, it vibrates 256 times per second. The speaker outputs 256Hz alternating current, and the current changes 256 times per second, emitting the C tune frequency. When the electric coil vibrates with the speaker membrane, it pushes the surrounding air to vibrate, and the speaker produces sound.

The frequency of sound waves that can be heard by the human ear is generally between 20 Hz and 20,000 Hz, so most speakers will be programmed within this range. The working principle is the same as above. The energy conversion process is from electrical energy to magnetic energy, then from magnetic energy to mechanical energy, and then from mechanical energy to sound.

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