MIP 179 Lecture Notes - Lecture 1: Magnetic Energy, Mechanical Energy, Electrical Energy
10 Oct 2017
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Highlighted , things related are highlighted in different colors. The pinna directs/focuses the sound to go into the middle ear. Throughout history, inventors created devices that modeled the human ear to. These devices were capable of recording voices and other sounds long before. Edouard leon scott de martinville sound waves the phonograph. Phon - sound, autograph - to write. Solution was to r everse the process for the playback. Horn to diaphragm was acoustical energy transforming into. Stylus to wax was mechanical energy mechanical energy. Diaphragm to horn was mechanical energy turning into acoustical energy. Needed to play louder than the surface noise. For orchestras, everybody had to be huddled together. Amplification , enabling to record more subtle (quiet) sounds. Birth of music industry as a business. Stamping discs was much easier than stamping on cylinders. Mixing consoles several inputs summed into one output. Tape could be cut out, and repaired with another tape . (editable)
