I have been recording the underwater sounds made by Inia geoffrensis over the last 3 years in the Peruvian Amazon. I have a number of recordings covering acoustic frequencies up to about 46 KHz and have observed some sounds from the dolphins that I have not found reported in the literature. I am looking for advice from anyone that has studied river dolphins or might put me in contact with someone who has. My goal is to determine if it is feasible to develop an acoustic analysis system that will supplement traditional census counts of these animals in the wild. Thank You David E. Bonnett 2374 NW Mountain View Road Silverdale, Wa 98383 Cell : 360 710 4963 Home: 360 779 3850 d-bonnett@wavecable.com