character: Ms. Sarah Lee
topic: Innovations in Audio Technology
grade: 9
subject: Physics
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character: Mr. John Smith
topic: Fundamentals of Sound Waves
grade: 9
subject: Physics
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character: Dr. Emily Tran
topic: Acoustics and its Applications in Modern Technology
grade: 9
subject: Physics
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character: Mrs. Lisa Brown
topic: The Physics of Musical Instruments
grade: 9
subject: Physics
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