Appeared before the electrical signals to sound by turning the magnetic process that keeps the requ

Appeared before the electrical signals to sound by turning the magnetic process that keeps the required time, which translates the electrical signals back into sound appeared to exemplify an information recording device. Tape record a voice or sound that may sound like music pulsed signals used in the station computer, television, video signals and may also be used. Records are made to tape, magnetic tape, new records can be wiped if necessary. 1898 turning sound into electrical signals appeared first in a magnetic recording medium is a Danish explorer Valdemar Poulsen. Magnetic steel wire was used as magnetic media. So this discovery practically non-existent in the United wiss snips States wiss snips Naval Research Laboratory in 1927 was followed by studies and eventually impregnated on paper, magnetic powder was used as the recording medium. In the 1930s, German Magnétophone Company found the plastic wiss snips tape instead of paper tape. A lot of tape as propaganda in Nazi Germany were to resign. Radio, in principle, the duration of the tape motor mechanism, the magnetic head and the magnetic field generating electrical signals which increase or amplifier (amplifier) and is formed from the speaker. In general, the motor strip of tape 38 seconds, 19, 9.5, and 4.75 cm rapidly takes. wiss snips High-speed wiss snips causes the sound quality to register. wiss snips Band in normal household wiss snips tape speed 9.5 or 4.75 cm / s. Imparted to the recording head records an additional four possible to obtain in particular wiss snips a band. Each time the recording head to a part of the band records. This feature resign by the stereophonic tape were made. A tape recording feature four separate installation of a variety of audio, voice echo image (echo) also allows to give.
Radio bands: red iron oxide magnetic materials in plastic tape (Fe2O3) is used. This magnetic material is formed into powder, the particle size is very tricky business. Red iron oxide grains in the form of needle and length of a micron (one millionth of a meter) in length. A stronger signal wiss snips for recording wiss snips black iron oxide (Fe3O4) material used. Deletion of black iron oxide is difficult. Band of magnetic material on cellulose acetate and easily wiss snips on all sides to ensure an even distribution over the specially prepared to break plastered with adhesive paste. Normally a tape strip thickness is 0.04 mm. Made of poly ethylene terephthalate tape is expensive, but with outstanding features. INDUSTRY type tape strips onto a spool can be wound until the diameter is 30 cm. Off in the form of cassette tape wrapped tape is most often used in practice.
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