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Feel free to send us your comments or suggestions at: About our site EA-100 Microphone Activities Click on activity title to view and print the activity. Do You Hear What I Hear? Students will be able to retrieve data from graph to be used in calculations. Of Roller Coasters and Song Activity involves plotting a sinusoidal curve representing the pressure vs. time relationship of sound. Updated: 1/3/99 by B. H. Giza