Assertion: whale's sound | /r/CreatedBy | blue whales
Facets:
value: with four notes
type: OTHER
Source sentences:
text: Estimates made by Cummings and Thompson (1971) suggest the source level of sounds made by blue whales are between 155 and 188 decibels when measured relative to a reference pressure of one micropascal at one metre.
text: Sounds made by blue whales are in the range of 155 – 188 decibels.
text: Sounds made by blue whales with four notes are popular as blue whales songs.