This DE500 is tethered next to our research vessel, which, at the moment, is in port on the Mediterranean island of Cyprus. That means sounds are limited mostly to snapping shrimp, boat noises and miscellaneous underwater sounds typical of ports and marinas. It's not the ideal location for demonstrating the excellent quality of the DE500 sound, but, it will give you an idea of how the system works. Listen, in particular, to the snapping shrimp clicks. These have a wide frequency spectrum and their clarity shows the quality you can expect.
Mobile telephone impose bandwidth limitations that at first glance seem like major limitations.
This is NOT the case in reality. Virtually all of the important long distance sound monitoring done with hydrophones occurs at frequencies below 3000 Hz. You will be impressed by the excellent quality that is virtually indistinguishable from wide bandwidth hydrophone systems.