character: Dr. Acoustics
topic: How Frequency Affects Pitch
grade: 9
subject: Physics
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character: Professor Soundwave
topic: Wave Properties and Sound
grade: 9
subject: Physics
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character: Ms. Harmony
topic: Understanding Sound Waves
grade: 9
subject: Physics
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character: Mr. Echo
topic: The Science of Sound and Resonance
grade: 9
subject: Physics
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