Warning: Table './innovate_wwwop/watchdog' is marked as crashed and should be repaired query: INSERT INTO watchdog (uid, type, message, variables, severity, link, location, referer, hostname, timestamp) VALUES (0, 'php', '%message in %file on line %line.', 'a:4:{s:6:\"%error\";s:14:\"strict warning\";s:8:\"%message\";s:44:\"Only variables should be passed by reference\";s:5:\"%file\";s:90:\"/home/innovate/public_html/sites/all/modules/custom/innovateus_menu/innovateus_menu.module\";s:5:\"%line\";i:38;}', 3, '', 'http://www.innovateus.net/invention/audio-tape-recording', '', '', 1501232733) in /home/innovate/public_html/includes/database.mysqli.inc on line 134
Invention : Audio Tape Recording

Audio Tape Recording

Innovation Info
Inventor (s): 
S. Joseph Begun
Country (invented in): 
Year Invented: 
Image Credit: 
Main Image: 

Who invented Audio Tape Recording?

  •  The audio tape recorder was invented in 1934 by Semi Joseph Begun in United States


When was the Audio Tape Recording invented?

  •  1934


When was the patent granted on the Audio Tape Recording?

  •  Valdemar Poulsen was granted a German patent for first magnetic recording device. In 1898 he patented the telegraphone, the first successful magnetic recording device - USF patent 661,619. Fritz Pfleumer was granted a patent for applying magnetic powder to film or paper strips in 1928.


Who was the patent granted to on the Audio Tape Recording?

  •  Valdemar Poulsen


What is Audio Tape Recording?

  • A tape recorder is an audio storage device that records and plays back sound using magnetic tape. It records a shifting signal by moving the tape across a tape head that differentiates the magnetic domains in the tape in proportion to the audio signal.
  • In the computer world, recording is used on floppy disks, hard disks and magnetic tape as the main method for data storage.
  • The tape recorders are very simple indeed. The basic idea encompasses an electromagnet that applies a magnetic flux to the oxide on the tape.
  • A tape recorder's record head is a very tiny, circular electromagnet with a small gap in it.
  • The electromagnet consists of an iron core wrapped with wire and while recording, the audio signal is sent through the coil of wire to create a magnetic field in the core.
  • At the gap, magnetic flux creates a fringe pattern to fill the gap, and this is the flux what magnetizes the oxide on the tape.
  • Throughout playback, the motion of the tape pulls a fluctuating magnetic field across the gap. This creates a varying magnetic field in the core and therefore a signal in the coil and the signal are amplified to drive the speakers.
External References