cussions Quizzes Dropbox Grades Week 1 Quiz.Quiz Time Left: 0:09 04Ahmed ALAbdul

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cussions Quizzes Dropbox Grades Week 1 Quiz.Quiz Time Left: 0:09 04Ahmed ALAbdulbaqi: Attenmpt 1 O The development of mirrors Save Question 7 (1 point) what seemingty obvious feature did Scott forget to include on the phonautograpn? O A hand crank to power the devise se O The ability to record sound A funnet-like hom to capture the sound O The ability to play back recorded sound Save Question 8 (1 point) Accarding to Steven Johnson, which technological advancement related to time is the most important for modern computing? O The internationat use of GMT as a reference time O The standardization of timezones across geographic distances O The ability to create self-winding clocks O The abiity to measure time at or below the nanosecond tevet Save s Society made durable.docx download has completed OpenO Open folder View downloads

Explanation / Answer

Ans 7. (d)

The phonautograph was invented by Frenchman Édouard-Léon Scott de Martinville, is the earliest known device for recording sound. It was patented by Scott on March 25, 1857. Scott de Martinville never intended to produce a machine that would playback the recorded sound data. Scott was able to develop the machine after three years of work. Phonautograph consisted of a cone-shaped speaking horn with flexible moving diaphragm connected to his smaller end. This cone gathered the sounds from its vicinity, transferred changing air pressure to the diaphragm which moved the styles that were attached to it. Recording of data was done by connecting moving part of the stylus to the piece of moving paper that was kept on a moving drum and was coated in thin layer of black soot.

Ans 8.(d)

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