character: Dr. Soundwave
topic: Sound Perception
grade: 9
subject: Physics
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character: Professor Acoustics
topic: Wave Interference and Sound Quality
grade: 9
subject: Physics
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character: Echo the Explorer
topic: How Waves Interact: Constructive and Destructive Interference
grade: 9
subject: Physics
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character: Ms. Harmony
topic: The Role of Frequency in Sound Perception
grade: 9
subject: Physics
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