Hi-Fi (High Fidelity)

Hi - Fi (High Fidelity), its definition - with the original voice is highly similar reproduction of sound.

Hi - Fi profile

So what kind of audio equipment reproduction of sound is Hi - Fi? So far is still difficult to make firm conclusions. Audio bounded professionals with each kind of instrument, by any measure, detect various index to determine the extent of equipment Hi - Fi, and audio fancier then often through my ears to judge whether the Hi to mind equipment - Fi. Discriminant heavy fidelity aloud in the startups, pitch needs not only has excellent performance equipment and software, and have good listening environment. Therefore, how to correctly measure audio equipments, Hi - Fi degree still exist objective test and subjective evaluation difference.

Hi - Fi = high fidelity, fancier mouth Hi - Fi system generally refers to technical index is higher audio equipments. Hi - Fi on limits.

Hi - Fi acoustic system structure

Hi - Fi audio systems from the structure can be divided into one-piece, suit type and combined. One-piece sound system is the equipment and all sorts of functions inside the speaker assembly in a box, can not optional apart, this kind of machine is commonly low-grade auv machine. Suit type sound system is designed by the manufacturer of equipment, complete, each single collocation between units can be apart. Audio combination is according to the individual's hobby choose various types of equipment, to free combination.

Audio system composition

Audio system mainly consists of auditory system (people's ears), hardware system (equipment), software system (source) and listening environment composition.

Audio source refers to the magnetic signal sound software or digital signal conversion for signals of the equipment, it includes the DVD, S - VCD, VCD, CDS, tuner, gets stuck and hi-fi video recorder, etc.

Power amplifier main is a sound equipment input will amplify weak signal after generate enough electricity to drive a speaker voice replay.

Speaker is a stereo equipment's voice, the voice of sound software ultimately on speakers to performance, the superiority of audio equipment heavy completely on speakers aloud to express, so speakers in audio equipments plays a vital role.

Audio systems are the main technical indexes?

Audio system main technical indicators are: frequency characteristics, SNR, dynamic range, transient response, stereo separating degree, stereo balanced.

Frequency characteristics: audio equipment replay the frequency range (when) and signal amplitude frequency response with changes in frequency relations (amplitude frequency characteristics). The amplitude of the unit is dB, frequency of the unit is Hz. Acoustic system frequency response at least 32-18000Hz, on this frequency range should be less than 2dB signal amplitude change.

SNR: in the same reference points the useful signal, and the ratio of noise of logarithm. In speakers input points SNR ear 70dB, from speakers metre noise nearly not smell, Hi - Fi systems usually reach 100dB above.

Dynamic range: audio equipment replay maximum output power and static not distortion system when the ratio of power output noise logarithm. Hi - Fi systems usually reach 100dB above.

Distortion degree: audio equipment replay, audio signal distortion degree. A harmonic distortion, crosstalk, transient distortion. Hi - Fi system harmonic distortion generally less than 1%.

Stereo separating degree: the separation of vocal about two degrees Celsius. Reflect the vocal crosstalk control two levels.

Stereo balanced: two signal gain the vocal about the difference.

Please refer, SNR, stereo separating degree, stereo balanced is the human ear discrimination, other indicators can be made through multiple system is compared, the expert guidance is very important.