character: Professor Wave
topic: Sound Waves and Their Characteristics
grade: 11
subject: Physics
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character: Sonic Explorer
topic: Types of Sound Waves
grade: 11
subject: Physics
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character: Echo Analyzer
topic: Reflection of Sound Waves
grade: 11
subject: Physics
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character: Frequency Guru
topic: Frequency and Pitch of Sound
grade: 11
subject: Physics
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