1. Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Ave., E25/342, Cambridge, Massachusetts 02139; H. P. Mosher Laryngological Research Laboratory, Massachusetts Eye and Ear Infirmary, Boston, Massachusetts 02114; Division of Engineering, Box D, Brown University, Providence, Rhode Island 02912; Eaton-Peabody Laboratory, Massachusetts Eye and Ear Infirmary, Boston, Massachusetts 02114; and Department of Otology & Laryngology, Harvard Medical School, Division of...