Both scream using the same part of the larynx—with an impressive octave range.
. This means they are likely the ones involved in producing the bat’s lower-frequency social calls.
Some humans actually use the ventricular folds in their throats to produce low-frequency vocalizations, such as the growls made by death metal singers and in TuvanAccording to the authors, this study is the first one to directly observe the self-sustained vibrations in bat vocal structures that are able to generate both echolocation and social calls.
“We show that bats vibrate extremely thin and light membranes extending from their vocal folds to make their high-frequency ultrasonic calls for echolocation,” the authors wrote
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