Assertion: blue whale's sound | /r/CreatedBy | animal
Facets:
Source sentences:
text: The sounds made by animals are sent out into the environment to bounce off of nearby objects and return information about the nearby objects by measuring the amount of time it takes for the sound waves to return.
text: Blue whales make very deep low-pitched sounds that have been recorded as high as 188 decibels (at 1m from the sound source) - far and away the loudest sound made by any animal.