character: Mr. Thompson
topic: Wave Whisperer: Exploring Acoustic Properties of Different Materials
grade: 9
subject: Physics
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character: Dr. Sonic
topic: Understanding Sound Waves in Various Media
grade: 9
subject: Physics
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character: Professor Echo
topic: The Influence of Material Density on Sound Propagation
grade: 9
subject: Physics
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character: Ms. Harmony
topic: Comparative Study of Sound Absorption in Different Textiles
grade: 9
subject: Physics
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