In 1981, American engineer Herman Regusters led his own expedition in search of Mokele-mbembe. He returned with a sound recording of a "low windy roar [that] increased to a deep throated trumpeting growl", which Herman Regusters believed to be the Mokele-mbembe's call.
Herman Regusters' conclusions about this tape were later contradicted by Dr. Roy Mackal, who asserted that the Mokele-mbembe did not have a vocal call. Dr. Roy Mackal asserts that vocalizations are more correctly associated with the Emela-ntouka.
Here is the link to Herman Regusters sound recording: http://www.youtube.com/watch?v=F2-KjHmXbUc.
It is very intresting.
Is it Mokele-mbembe, or is it the Emela-ntouka?
While Mokele-mbembe is a dinosaur, Emela-ntouka may or may not be. Nevertheless, the sound recording seems to be of a dinosaur.