It's a big noise for a little cat.
might be an instant mood boost for many, but the science behind this feline sound has long been a mystery.However, it turns out friendly felines have ‘squishy purring pads’ to overcome that particular quirk of nature.
These pads of connective tissues are embedded in the vocal folds to make them thicker, increasing the density which in turn makes them vibrate more slowly.But by conducting laboratory experiments using the larynges of deceased domestics cats, the research team found that simply pushing warm, moist air past the vocal chords generated a purring sound. The experiment created self-sustaining vocal fold oscillations, ranging from 25Hz to 30Hz.
The discovery also suggests that purring may serve a different purpose than other cat vocalisations, such as meows and growls.Kittens start purring when they are just a few days old and use the sound to signal to their mother that they are hungry or cold. Purring may also have a self-soothing effect for cats. Studies have shown that purring can reduce stress and pain in cats, explaining why cats often purr when they are being petted or when they are sick or injured.
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