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Audio specifically refers to an audio system that is a combination of electrical equipment that produces sound. The development history of audio technology can be divided into four stages: electron tubes, transistors, integrated circuits, and field effect transistors.

Basic meaning

Sound is a simplified everyday word and is the abbreviation of sound system. It refers to a complete set of equipment that can restore and play audio signals.

With the progress of society, people yearn for a more colorful life. As a form of entertainment that has been passed down for thousands of years, singing and dancing have penetrated deeply into the lives of people of all ethnic groups. However, with the development and advancement of science and technology, people have more and more demanding requirements for singing and dancing performance forms and venues.

The sound system is continuously improved and perfected in line with people's needs. It is large enough to meet the needs of live sound reinforcement for tens of thousands of people in concerts, and small enough to meet the needs of individual families playing musical instruments and singing karaoke.

Components

The sound system generally includes:

1. Sound source equipment (DVD, CD, MP3, MP4, computer, mobile phone, microphone and other sound sources output device).

2. Audio signal dynamic processing equipment (compressors, effectors, mixers, audio processors, equalizers and other audio signal processing equipment).

3. Audio signal amplification equipment (pre-stage power amplifier, post-stage power amplifier, digital power amplifier and other analog power amplifiers and equipment).

4. Sound restoration equipment (full-range speakers, ceiling speakers, sound columns, line array speakers, array speakers, tweeters, subwoofers, etc.).

Specifically include power amplifiers, peripheral equipment (including compressors, effects, equalizers, exciters, etc.), speakers (speakers, speakers), mixers, sound sources (such as microphones, musical instruments, VCD , DVD) display equipment, etc. add up to a set. Among them, speakers are sound output devices, speakers, subwoofers, etc. A speaker includes three types of speakers: high, low, and medium. Three but not necessarily three.

Speaker placement

How should the speakers be placed? The correct placement of the speaker is one of the factors for obtaining good sound playback effect. The following issues must be paid attention to when placing it:

1. The distance between the two speakers should be no less than 1.5~2 meters and should be kept at the same level. The left and right sides of the speaker should be the same distance from the wall. There should be no clutter in front of the speaker.

2． The tweeter unit of the speaker and the listener's ears should be at the same level. The angle between the listener and the two speakers should be 60 degrees, and there should be a certain amount of space behind the listener.

3. The walls on both sides of the two speakers should be acoustically consistent, that is, the walls on both sides should reflect sound waves the same way.

4. If the directivity of the sound waves of the speakers is not wide, the two speakers can be placed slightly inward.

5. If you feel that the low frequency of a small speaker is not enough, you can place the speaker close to the corner.

Reference for the above content: Audio