Communication and Perception
Most odontocete whistles are narrowband sounds. The frequency pattern can be unmodulated, trilled, ascending, descending, ascending-descending, descending-ascending, or slowly wavering. A whistle can consist of one of these sound patterns that is given once or repeated. It can also consist of a series of sounds of several types. The amplitudes of the ascending and descending portions can vary over the duration of a whistle. Whistles can have a varying number of breaks and segments in one whistle or be continuous. The initial, final, maximum and minimum frequencies, as well as the duration and level, may vary for any one species.
M. carlhubbsi produces pulses and whistles to communicate. Their typical frequency range for pulses are 0.3-2, 0.3-80+ kHz, with the dominant frequencies occurring in the range of 0.3-2 kHz. The typical frequency range for whistles is 2.6-10.7 kHz.
In addition to vocal communication, it is likely that M. carlhubbsi, like other mammals, uses both visual and tactile signals.
Communication Channels: visual ; tactile ; acoustic
Perception Channels: visual ; acoustic
- Richardson, W. 1995. Marine Mammals and Noise. California: Academic Press.