character: Mr. Johnson
topic: The Role of Acoustic Panels in Reducing Echo
grade: 11
subject: Physics
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character: Ms. Smith
topic: Sound Waves and Their Properties
grade: 11
subject: Physics
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character: Mr. Thompson
topic: Understanding Echo and Reverberation
grade: 11
subject: Physics
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character: Dr. Lee
topic: Applications of Soundproofing Materials in Modern Architecture
grade: 11
subject: Physics
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