By: Mackenzie Burt. Mr. Hardin's 3rd period. Audio timeline! By: Mackenzie Burt. Mr. Hardin's 3rd period.

1452-1519 Leonardo DaVinci, discovered sound moves in waves. http://www.enotes.com/science/q-and-a/who-discovered-sound-wave-when-126763

1520 Christian Doppler later discovered that sound waves could be compressed or expanded, thereby. http://www.enotes.com/science/q-and-a/who-discovered-sound-wave-when-126763

1753 The first horns were monotone instruments. Hampel invented the means of applying movable slides (crooks) of various length that changed the key of the horn. http://inventors.about.com/od/fstartinventions/a/French_Horn.htm

1827 Sir. Charles Wheatstone was the first person to create the microphone. http://inventors.about.com/od/mstartinventions/a/microphone.htm

1857 Édouard-Léon Scott de Martinsville invented the phonautograph, the first device that could record sound waves as they passed through the air. http://en.wikipedia.org/wiki/History_of_sound_recording#Acoustical_recording

1860-1935 The Dickson Experimental Sound flim is a film made by William Kennedy-Laurie Dickson http://benbeck.co.uk/firsts/talkies1.htm

1877 Thomas Alva Edison, was working in his lab when he succeeded in recovering Mary's Little Lamb from a strip of tinfoil wrapped around a spinning cylinder. http://www.aes.org/aeshc/docs/audio.history.timeline.html

1878 In 1878 was when the first recording came out. It was Yankee Doodle. It was cornetist Jules Levy. http://www.aes.org/aeshc/docs/audio.history.timeline.html

1910 Nathaniel Baldwin invented the first headphone. The first headphone was made from leather, ceramics, copper and rubber. http://www.whenwasitinvented.org/when-was-the-first-headphone-invented/

1918 Nathaniel Baldwin was the inventor of the first earphones. http://en.wikipedia.org/wiki/Nathaniel_Baldwin

1919-1930 Although headphones have been around since 1919, Beyer dynamic were the first to invent the headphones for commercial use in the late 1930s. http://answers.ask.com/Consumer_Electronics/Portable_Audio_Players/who_invented_headphones

1929 Harry Nyquist published the mathematical foundation for the sampling theorem basic to all digital audio processing

1932 The first cardioids ribbon microphone is patented by Dr. Harry F. Olson of RCA. http://www.aes.org/aeshc/docs/audio.history.timeline.html

1958 John C. Koss invented the first stereo headphones. http://www.whenwasitinvented.org/when-was-the-first-headphone-invented/

1975 Digital tape recording begins in professional audio studios. http://www.aes.org/aeshc/docs/audio.history.timeline.html

1979 Sony introduces a palm-sized stereo cassette tape player called a "Walkman.“ http://www.aes.org/aeshc/docs/audio.history.timeline.html

1982  The first CD player was invented by Sony and was released to the world in October of 1982 at a cost of around $900. http://answers.ask.com/Computers/Hardware/when_was_the_first_cd_player_invented

1995  The first DVD player known as the Digital versatile Disc was invented in the early 1990's and was announced to the public in 1995. http://answers.ask.com/Computers/Hardware/when_was_the_first_dvd_player_invented

1997 DVD videodiscs and players are introduced. An audio version with 6-channel surround sound. http://www.aes.org/aeshc/docs/audio.history.timeline.html

1998 MP-3 players for downloaded Internet audio appear. http://www.aes.org/aeshc/docs/audio.history.timeline.html

1999 Audio DVD Standard 1.0 agreed upon by manufacturers. http://www.aes.org/aeshc/docs/audio.history.timeline.html