9/23/2023 0 Comments Vocal post processing tiger growlBut while a baby's cry is high-pitched, it is also grating and rough, a call that captures the attention just like a tiger's roar. That ligament can take a lot of tension, allowing the elk to produce a high-pitched bugling sound that seems strange coming from such a large animal.īabies lack the fatty cushion of a lion's voice box, and their vocal cords are tiny, less than a tenth of an inch (2-3 millimeters) long, Titze said. But instead of fat, they have a stiff ligament backing up their vocal cords. In contrast, he said, Rocky Mountain elk have larynxes almost the same size as a lion or tiger. "What matters is that it's a big sound and it gets people's attention." "It doesn't matter so much what the pitch is," Titze said. The trade-off is that such floppy vocal cords can't be fine-tuned to the high pitch of a human singer, but for lions and tigers, that's not a big deal. Fat is squishy, offering more leeway for the vocal cords to vibrate, Titze said. The second secret to a big cat's roar is a layer of fat within the vocal folds, where other animals have a ligament. That's one key to the roar of a lion or tiger: They need very little lung pressure to make large vibrations, which translate to a big sound. When just a small puff of air is blown between these two plates, vibrations start, Titze said. "What's peculiar about the lion and tiger vocal folds is that they have a very flat surface on the front," Titze said. The scientists dissected the tiger and lion larynxes and subjected the vocal cords to mechanical tests to understand how much strain the tissues could take. In the case of the big cats, the researchers wanted to know how the animals form their loud roars, which can reach 114 decibels to someone standing a short distance away, about 25 times as loud as the noise of a gas lawn mower. But the tissues and shape of the vocal folds differ among species, and understanding how the process works in one animal can help clarify how vocal-fold layers work together in another, Titze said. All mammalian larynxes work in similar ways: Air from the lungs vibrates folds of tissue called vocal folds or vocal cords, producing sound. Studying animal voice boxes can help researchers understand how the various parts of the human larynx work, Titze said.
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