For those who want the very best hydrophone system for whale watching, the Cetacean Research™ C57-pas is the system used by National Geographic Explorer / Lindblad Expeditions.
The system includes:
- the Cetacean Research™ C57 hydrophone, a preamplified, cylindrical hydrophones designed for the detection of infrasonic, audible, and ultrasonic sounds.;
- a portable amplified speaker such as one of the Expedition all-in-ones