00:21Some make very comforting noises, like ho ho ho, and I like quiet noises, and some are screamers.
00:29They would just scream out, I'm left alone, I'm left alone, and they would go, whee!
01:00So the low pitch starts somewhere here and then goes down, while the high pitch stays flat.
01:08You can also hear the difference between the two tones.
01:18Some people and humans also can activate their vestibular vocal folds situated below the
01:24vocal folds, so that's how we make throat singing.
01:27And then we can also talk at the same time as we whistle if I do, then I make two
01:33frequencies.
01:35But otherwise, in other species, it's very uncommon.
01:48By these two frequencies, they can really express the whole range of emotions possible, because
01:55they can express emotions in these two dimensions.
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