17.5 Exercise 36

A crude approximation of voice production is to consider the breathing passages and mouth to be a resonating tube closed at one end. (See the figure.) (a) What is the fundamental frequency if the tube is 0.240-m long, by taking air temperature to be $37.0ºC$? (b) What would this frequency become if the person replaced the air with helium? Assume the same temperature dependence for helium as for air.