A small long-life acoustic transmitter for studying the behavior of aquatic animals

In this study, we developed a small, long-life acoustic transmitter with an approximate length of 24.2 mm, diameter of 5.0 mm, and dry weight of 0.72 g. The transmitter generates a coded acoustic signal at 416.7 kHz with a selectable source level between 159 and 163 dB relative to 1μPa at 1 m, allowing a theoreticaldetection range of up to 500 m. The expected operational lifetime is 1 yr at a pulse rate interval of 15 s. The new technology makes long-term acoustictelemetry studies of small fish possible, and is being deployed for a long-term tracking of juvenile sturgeon.
Source: Review of Scientific Instruments - Category: Physics Authors: Source Type: research