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Animals
Where do cats purr from?
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Where do cats purr from? When cats breathe, they dilate and constrict the glottis, the area around their vocal cords, in a rapid, rhythmic fashion. As the air vibrates over the laryngeal muscles of their larynx, the purring sound occurs.
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Purring involves the rapid movement of the muscles of the larynx (voice box), combined with movement of the diaphragm (the muscle at the base of the chest cavity). The muscles move at around 20 to 30 times per second. As the cat breathes, air touches the vibrating muscles, producing a purr.
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