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Publisher
The Great Courses
Pub. Date
2022.
Language
English
Description
In the 1870s, Alexander Graham Bell was trying to improve the telegraph when he and his assistant discovered that speech itself could be transmitted over telegraph wires. Explore the subsequent engineering developments that brought the telephone to almost all households, including Bell's invention of twisted-pair cabling to reduce crosstalk, still in use today.
Publisher
The Great Courses
Pub. Date
2022.
Language
English
Description
In the old-style analog telephone system, voltage increased and decreased across the wires, corresponding to the human voice signal. But in a digital system, that all changes. Learn how the human voice is changed into binary values, sent over the system, and then converted back into volts with the voltage applied to the speaker in the phone handset. The human ear takes it from there.
Publisher
Filmmakers Showcase
Pub. Date
2023.
Language
English
Description
35mm 1.33:1 color sound, 7:02 minutes; production assistance John Cage; music_Hungarian Rhapsody No. 2_by Franz Liszt; courtesy Warner Bros.,Turner Entertainment Co. A milestone in object animation, Fischinger manipulated hundreds of paper cutouts hung on invisible wires and shot a frame-at-a-time in close synchronization to Liszt's rhapsody. The dance of shapes resembles a voyage through an imaginary space where "the keen sensation of depth becomes...