Sound enters the ear, travels through the auditory canal, and reaches the eardrum. the auditory canal is approximately a tube open at only one end. the other end is closed by the eardrum. a typical length for the auditory canal in an adult is about 2.26 cm. the speed of sound is 348 m/s. what is the fundamental frequency of the canal? (interestingly, the fundamental frequency is in the frequency range where human hearing is most sensitive.)

Click the game tab at the bottom of the simulation and select level 1. (there is no seesaw balance for this part of the activity.) balance the first equation, and click check to see if you got it right. if you can’t balance it in the first try, you can try again. work through the five equations for level 1. click continue to go on to level 2, and later level 3. each level is more difficult than the one before. keep trying until all the equations are balanced. in one or two sentences, describe how you did in the balancing game. in a few more sentences, explain one strategy you learned for balancing more complex equations.