(5%) Problem 16: A crude approximation of human voice production is to consider the breathing passages and mouth to be a resonating tube closed at one end. (See the figure) Soft palate Tongue Pharrus Vocal cord Laryea -Trachea Otheexper $ 50% Part (a) What is the fundamental frequency, in hertz, of a voice if the tube is 0.21-m long, taking air temperature to be 37.0C? f1 = 355.9 Grade Summary Deductions Potential ed ed sin() cos() tan() 7 8 9 HOME Submissions ed cotan() asin( acos() E 4 5 6 Attempts remaining (0% per attempt) ted atan() acotan() sinh( 1 2 3 detailed view ted cosh() tanh() cotanh() END ted Degrees O Radians BACKSPACE DEL CLEAR ted ted Submit Hint Feedback I give up! eted Hints: 0% deduction per hint. Hints remaining: 1 Feedback: 09% deduction per feedback & 50% Part (b) What would this frequency become, in hertz, if the person replaced the air with helium? Assume the same temperature dependence for the speed of sound in helium as for air, and that the speed of sound in Helium is 965 m/s at 0C