Sound Audio High fidelity, High fidelity or hi-fi copy is a time period used by house stereo listeners and home audio fans (audiophiles) to refer to high-high quality replica of sound to distinguish it from the poorer high quality sound produced by cheap audio equipment. Ideally, high-constancy tools has minimal amounts of noise and distortion and an accurate frequency response.
One effort to standardize the term was the 1966 German Deutsches Institut für Normung (DIN) standard DIN 45500. DIN 45500 approval was supposed to provide audio gear patrons with reassurance that their gear was able to good quality reproduction. In principle, only stereo gear that met the usual might bear the phrases ‘Hi-Fi’. This standard was properly intentioned however solely mildly profitable; in observe, the time period was extensively misapplied to audio products that didn’t remotely approach the DIN basis specifications.