Currently, there is a lag in the proliferation of underwater sensors due to
the lack of low cost acoustic transmitters. The high cost of acoustic modems
and some of their characteristics, make them inappropriate for many
scenarios where low power and short range communications are required.
This paper presents the design and the details of a low-cost acoustic transmitter
for underwater sensors.
Sarriá Gandul, David; Pallarés, Oriol; Manuel Lázaro, Antonio. Low-cost acoustic transmitter for underwater sensor networks. "Instrumentation viewpoint", 2012, vol. Winter, núm. 13, p. 20.