character: Professor Resonance
topic: Resonance in Sound Waves
grade: 9
subject: Physics
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character: Professor Wave
topic: Types of Sound Waves
grade: 9
subject: Physics
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character: Dr. Frequency
topic: Frequency and Sound Behavior
grade: 9
subject: Physics
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character: Ms. Harmonics
topic: Harmonics and their Effects on Sound
grade: 9
subject: Physics
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