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How can echolocating toothed whales make 500 clicks/second with air at 1000 m depth where air volume is compressed to <1%? With the same nasal sound source how do they produce powerful high frequency clicks for echolocation & softer, low frequency calls for communication?

Bioacoustics AU

2,449 subscribers

17,578 просмотров • 3 лет назад •via X (Twitter)

Животные Наука и технологии

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Фото профиля Bioacoustics AU

Bioacoustics AU3 лет назад

Via long-term support from the @Carlsbergfondet and @DFF_raad, @CoenElemans, Ursula Siebert, & @BioacousticsAU (@NatSci_AU @ZoophysiologyAU) are happy to answers these long-standing questions in this newly released Science paper! #ScienceResearch

Фото профиля Bioacoustics AU

Bioacoustics AU3 лет назад

Over the last 10 years, we developed & used several new techniques, ranging from in vivo endoscopy to in vitro preparations & acoustic tags on toothed whales in the wild

Фото профиля Bioacoustics AU

Bioacoustics AU3 лет назад

We show toothed whales possess a nasal sound production system driven by air. Loud clicks are made when phonic lips collide after having been forced apart by the airflow. This mechanism is functionally the same as laryngeal & syringeal sound production in other mammals & birds

Фото профиля Bioacoustics AU

Bioacoustics AU3 лет назад

Acoustic analysis of calls across different toothed whale species show that vocalizations are produced at different frequencies, consistent with tissue vibrations at different registers: just like human vocal folds

Фото профиля Bioacoustics AU

Bioacoustics AU3 лет назад

The vocal fry register or M0 register makes powerful, high frequency echolocation clicks, & the two other registers make softer, more low frequency social calls for communication. For both sound types, air can be recycled, allowing for continued sound production during deep dives

Фото профиля Bioacoustics AU

Bioacoustics AU3 лет назад

Deep diving animals use the vocal fry register for echolocation! This register uses very little air per click & explains how apex predators can make the loudest biological sounds at >1000 m. Allowing >20 species of toothed whales to access food rich niches of the deep ocean!

Фото профиля Bioacoustics AU

Bioacoustics AU3 лет назад

🚨🐬 Check out the paper here:

Фото профиля Frank Eaton, FCOC

Frank Eaton, FCOC3 лет назад

is that Cuviers beaked whale?

Фото профиля Kristen

Kristen3 лет назад

#saveourwhales

Фото профиля B.cxx

B.cxx3 лет назад

Now I know how a hungry whale sounds.

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