1. The problem statement, all variables and given/known data When you sing, the vocal folds in your throat act as a resonating cavity (one open end, one closed end) which allows only certain frequencies. Suppose you try to sing a pure tone which is detected by a microphone and measured to have a frequency 500.0 Hz. This is the resonance frequency of the vocal folds in your throat, which only depends on the tension and mass of the flesh in your vocal folds. If you now replace the air of density 1.000 kg/m3 with helium of density 0.1640 kg/m3, what frequency will the microphone measure? Provide a graphical representation of the standing waves in your throat. You may assume that the bulk modulus remains constant in the two cases, and that only the density changes. 3. The attempt at a solution I think if we change the medium to helium,it will change only wavelenth. So Frequancy remains constant.