TOEFL Reading Complete the Words Practice #025 - The First Sound Recordings

Complete the Words designed to build passage comprehension, evidence use, and efficient reading decisions.

10 QuestionsAbout 15 minutesExpert

What you will practice

Reading comprehension
Evidence and inference
Time management

Topic: Biology · Complete the Words

Passage preview

Early inventors knew that sound created vibrations, but preserving those vibrations was difficult. In the nineteenth century, experimenters developed devices that directed a voice toward a thin diaphragm. The moving diaphragm pushed a stylus, which traced a…

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