1. Section on Auditory Mechanics, NIDCD, Bethesda, MD 20892, USA
2. Dept. Mathematics, Vanderbilt University, Nashville, TN 37240, USA
3. DBEPS/OD, NIH, Bethesda, MD 20892, USA
4. Dept. Otology and Laryngology, Harvard Medical School, Boston MA 02114, USA
5. Woods Hole Oceanographic Institution, Woods Hole, MA, 02543, USA