character: Dr. Amelia Soundwave
topic: Acoustics Researcher
grade: 11
subject: Physics
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character: Professor Echo
topic: Sound Wave Propagation
grade: 11
subject: Physics
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character: Ms. Harmony
topic: Human Auditory Perception
grade: 11
subject: Physics
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character: Mr. Frequency
topic: Wave Characteristics and Sound
grade: 11
subject: Physics
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