Your favorite older male crooner is coming to town to perform at the Flynn. He is going to sing, "I Left My Heart in San Francisco," your favorite song! Name at least three changes you would expect to hear in his voice due to normal age-related changes. Do not say he has no changes because he a consummate professional and trains to keep his voice in shape. Hint: your book has a section under the Respiratory chapter that may help you. For the toolbar, press A L T + F 10 ( PC ) or A L T + FN + F 10 (Mac)..