New Research Reveals the Mystery Behind Cats’ Purring
A recent study conducted by voice scientist Christian T. Herbst of the University of Vienna, published in Current Biology, has shed light on the fascinating phenomenon of cats’ purring. The research suggests that a unique ‘pad’ embedded in their vocal cords could be the reason behind their ability to produce these low-frequency sounds.
The Vocalization of Cats
Cats are known for their vocal nature, meowing, squealing, and purring. From a voice production perspective, meows and squeals are not particularly remarkable. They are generated in the larynx, just like vocalization in humans and many other mammals.
However, for a long time, purring was believed to be exceptional. Previous research dating back decades proposed that purring is produced through the cyclical contraction and relaxation of the vocal cord muscles within the larynx, requiring constant neural input and control from the brain.
A Surprising Discovery
The study led by Herbst challenges this long-held belief. Through controlled laboratory experiments, the researchers found that the domestic cat larynx can produce impressively low sounds at purr frequencies without the need for cyclical neural input or repetitive muscle contractions.
This mechanism of sound production is remarkably similar to the human «squeaky voice» or «cheerful vocal.» It suggests that cats have a unique anatomical feature that allows them to produce such low-frequency sounds, even though they are small animals weighing only a few kilograms.
Implications for Understanding Cat Purring
While the findings of this study do not completely invalidate the previous theory, they indicate that our current understanding of cat purring is incomplete and calls for further research. The discovery of the vocal cord pad opens up new avenues for exploring the fascinating world of feline communication.
The Purpose of Purring
Cats start purring when they are only a few days old, using it as a form of communication with their mothers. It serves as a way of letting their mothers know that they are present and well. Purring also helps strengthen the bond between mother and offspring.
Interestingly, purring continues throughout a cat’s lifetime. While many believe that cats purr for satisfaction and pleasure, it is worth noting that cats also purr when they are in pain or injured. According to Dr. Elizabeth Von Muggenthaler, purring with its low-frequency vibration is a natural healing mechanism.
Contrary to popular belief, cats also purr when they are under pressure, such as during a visit to the vet. It seems that purring serves multiple purposes, including reducing pain, calming themselves, and maintaining control.
Overall, the recent research on cat purring has provided valuable insights into this unique behavior. It has opened up new questions and avenues for exploration, deepening our understanding of the complex world of feline communication.