28-08-2017, 12:37 PM
High fidelity playback (often shortened to high fidelity or high fidelity) is a term used by home stereo listeners, audiophiles and home audio enthusiasts to refer to high quality sound reproduction to distinguish it from the lowest quality Sound produced by inexpensive audio equipment, or the inferior quality of sound reproduction that can be heard on recordings made until the late 1940s. Ideally, the hi-fi equipment has inaudible noise and distortion, and A flat (neutral, colorless) frequency response within the intended frequency range.
Bell Laboratories began experimenting with a wider range of recording techniques in the early 1930s. The performances of Leopold Stokowski and the Philadelphia Orchestra were recorded in 1931 and 1932 using telephone lines between the Philadelphia Academy of Music and the Bell Labs in New Jersey. Some multi-track recordings were made on optical sound film, which led to new developments mainly used by MGM (as early as 1937) and 20th Century-Fox Film Corporation (as early as 1941). RCA Victor began recording performances by several orchestras with optical sound around 1941, resulting in more faithful masters for 78-speed discs. During the 1930s, Avery Fisher, an amateur violinist, began experimenting with audio design and acoustics. I wanted to make a radio that sounded as if I were listening to a live orchestra, which would achieve a high fidelity to the original sound. After World War II, Harry F. Olson performed an experiment whereby test subjects listened to a live orchestra through a hidden variable acoustic filter. The results showed that listeners preferred high-fidelity playback, once they eliminated the noise and distortion introduced by early sound equipment.
Bell Laboratories began experimenting with a wider range of recording techniques in the early 1930s. The performances of Leopold Stokowski and the Philadelphia Orchestra were recorded in 1931 and 1932 using telephone lines between the Philadelphia Academy of Music and the Bell Labs in New Jersey. Some multi-track recordings were made on optical sound film, which led to new developments mainly used by MGM (as early as 1937) and 20th Century-Fox Film Corporation (as early as 1941). RCA Victor began recording performances by several orchestras with optical sound around 1941, resulting in more faithful masters for 78-speed discs. During the 1930s, Avery Fisher, an amateur violinist, began experimenting with audio design and acoustics. I wanted to make a radio that sounded as if I were listening to a live orchestra, which would achieve a high fidelity to the original sound. After World War II, Harry F. Olson performed an experiment whereby test subjects listened to a live orchestra through a hidden variable acoustic filter. The results showed that listeners preferred high-fidelity playback, once they eliminated the noise and distortion introduced by early sound equipment.