4 Copyright © 2011-2013 SM2M+ User Manual
Hydrophone Options
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The Standard Acoustic hydrophone is used to record whale songs,
dolphin whistles, and/or ambient noise levels, from infrasonic into
ultrasonic frequencies.
With the Ultrasonic upgrade, additional circuitry and the Ultrasonic
hydrophone increases the recording bandwidth of the system to
allow recordings not only from ultrasonic dolphin and porpoise
echolocation calls, but also ultrasonic anthropogenic sounds as
well.
The low-noise hydrophone is for recording ultra-quiet
environments such as remote marine sanctuaries, deep-water
locations or long-range, offshore sites. It has the lowest noise floor
of all the hydrophones with its self-noise being well below sea
state 0 over its entire recording bandwidth. (See the self-noise
chart on the following page).
The High-SPL is specifically tailored to recording and quantifying
high sound pressure levels such as those produced by pile drivers
H
High-SPL Standard
Ultrasonic Low Noise Dual
Configuration Top Cap
