The audio device is composed of sound source (music player, pickup device, microphone), control device (analog or digital mixer), audio processor( it used to use effector, equalizer, voltage limiter, divider, signal distributor, delay device and other peripherals. Now there are digital system controllers that integrate all these functions. ), power amplifier (amplifier), speaker. The above equipment is used in a string of different types of wire and cable.
There are two types of sound, integration, and stratification. In an integrated stereo, all parts of its circuit (including a phonograph) are in a shell, which is generally used in a low-grade composite sound. In a layered composite sound, the number of layers divided according to the grade of the machine is different. There are more layers in the combined audio system: the record player, the CD player, the tuner, the double card tape deck, the tone controller and the main power amplifier. In the composite sound with less stratification, the phonograph and CD phonograph are divided into one layer, and the others are one layer. Miniaturization, digitalization, specialization and film and television are the inevitable development trend of family sound.
Audio source (music broadcasting equipment, pick-up device)
Control equipment (analog tuning console, digital tuner, digital audio media matrix, AV digital management center)
Peripheral equipment (processor, equalizer, pressure limiter, divider, exciter, delay device, effector, feedback suppressor)
Restore equipment (speaker or speaker system, power amplifier)
Connecting line (the above equipment is connected by various types of wire and cable, which form a unified sound system)
The audio equipment has a high requirement for users. They need to know the function and use of various equipments, and have the professional theoretical knowledge, accurate listening ability, strong debugging level, emphasis on fault diagnosis and troubleshooting. The difficulty lies in the design and debugging of the system.
The acoustic characteristics of the audio equipment should not only meet the requirements of the national standards of the acoustic characteristics but also meet the requirements of the subjective listening. Because the acoustic characteristics cannot fully reflect the actual sound effect, the sound is ultimately determined by the subjective listening feeling of the people. In acoustic design, sound and sound building design should be well matched to meet the following subjective listening requirements: proper loudness. The loudness is the intensity feel of the actual listening, which is directly related to the maximum sound pressure level of the sound expansion system. For the performance, only to reach enough loudness can the sound effect be fully displayed. The output power of the system and the placement of the sound box will directly determine the loudness of the listening area: high definition.