News
The HIFI sound system composed of knowledge to explain
Source:JerryPower | Author:jerrypower | Published time: 2014-10-22 | 2183 Views | Share:
The Hi-Fi sound system can be divided into integrated, set type and combination type from the structure. One type of sound system is all the functions of the equipment and a loudspeaker in an enclosure, can not be opened, this kind of machine is generally low-grade popular type machine. Set audio system is designed by the manufacturer, will be a variety of equipment single match between sets, each unit can be taken apart. Sound combinations, according to personal preferences to choose various types of equipment, free combination.
The Hi-Fi sound system can be divided into integrated, set type and combination type from the structure. One type of sound system is all the functions of the equipment and a loudspeaker in an enclosure, can not be opened, this kind of machine is generally low-grade popular type machine. Set audio system is designed by the manufacturer, will be a variety of equipment single match between sets, each unit can be taken apart. Sound combinations, according to personal preferences to choose various types of equipment, free combination.
The sound system is mainly composed of the auditory system (ear), hardware (equipment), software (source) and listening environment.
Refers to the magnetic signal or digital signal source in the software into electrical signal equipment, which mainly includes DVD, S-VCD, VCD, CD, tuner, deck and hi fi VCR etc..
Power amplifier is mainly the replay will amplify weak input signal source equipment after the current large enough to drive the loudspeaker to generate sound.
The box is the mouthpiece of a set of audio equipment, a sound source software on the final speaker to the performance, advantages and disadvantages of audio equipment heavy burst of entirely by speakers to express, so the speaker has play a decisive role in the effect of sound devices.
The sound system with those main technical indicators?
The main technical indicators and sound system: frequency characteristic, signal to noise ratio, dynamic range, transient response, isolation of the stereo, stereo balance.
Frequency characteristic frequency range: audio equipment replaying (frequency response) and the signal amplitude variation with frequency relationship (amplitude frequency characteristic). The magnitude of the unit is dB, the unit of frequency is Hz. The sound of the frequency response of the system of at least 32-18000Hz, change the amplitude of the signal in the frequency range must be less than 2dB.
SNR: in the same reference point of useful signal and noise ratio and the logarithm of. In point of signal to noise than 70dB speaker input, ear from the speaker a meter noise almost inaudible, Hi-Fi system is generally above 100dB.
Dynamic range: audio equipment replay undistorted maximum output power and output power system static log when noise ratio. Hi-Fi systems are generally above 100dB.
Distortion: audio equipment, reproduction, distortion degree of the source signals. Harmonic distortion, intermodulation distortion, distortion transient. Hi-Fi system harmonic distortion is generally less than 1%.
Stereo separation degrees: degrees of separation about two channel. Crosstalk levels reflect about two channel.
Stereo balance: the degree of signal gain about two channel difference.