character: Dr. Johnson
topic: Understanding Sound Waves in Digital Communication
grade: 10
subject: Physics
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character: Mr. Smith
topic: Introduction to Waves and Their Properties
grade: 10
subject: Physics
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character: Ms. Taylor
topic: Digital Signal Processing and Waveforms
grade: 10
subject: Physics
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character: Dr. Lee
topic: The Role of Frequency in Communication Technology
grade: 10
subject: Physics
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