Glossary - R
floating instruments designed to move with a current and track the current's movements
gradually increasing the sound source level
The instantaneous, local reduction in density of a gas or other medium resulting from passage of a sound wave.
something that listens for or receives sound; it may or may not record the sound
receiver-operating-characteristic (ROC) curve
a curve that plots the cumulative distribution functions of the false-alarm probability and the detection probability on the x-axis and y-axis, respectively, to select the optimal detection threshold.
hole, corner or niche. For example, a rock recess, a place surrounded by rocks where a fish can hide
when acoustic energy causes supersaturated gas to be pumped into an existing small bubble, making the bubble increase in size
the wave moving away from the reflector
the deflection of the path of a sound wave by an object or by the boundary between two media
any boundary between two media that causes the reflection of a wave
the bending of a sound wave towards a region of slower sound speed
Suite of behaviors that an animal may use in different contexts; in this case, the number of call types that have been distinguished based on categorization of vocal behavior.
when sounds of specific frequencies cause air- or fluid-filled organs to vibrate with amplitudes that are large compared to the amplitude of incoming soundwaves
something that fills with sound and acts as a natural amplifier
a tightly packed bundle of capillaries which works with the gas gland to force gases into the bladder
A strong, narrow surface current that flows rapidly away from the shore, returning the water carried shoreward by waves.
the rotation of a vessel about its longitudinal (front/back) axis.
the square root of the average of the square of the pressure of the sound signal over a given duration. Root-mean-square is often abbreviated rms
whales of the family Balaenopteridae which includes humpbacks, sei, minke, fin, blue and Bryde's whales. They have throat pleats or ventral grooves that expand when the whales gulp large amounts of water while feeding.
upper jaw of whales that is elongated and looks like a beak