1. Eaton-Peabody Laboratories, Massachusetts Eye and Ear Infirmary, Boston, Massachusetts;
2. Department of Otology and Laryngology, Harvard Medical School, Boston, Massachusetts;
3. Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, Massachusetts;
4. Ear Institute, University College London, London, United Kingdom
5. Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts; and