What part do cats purr with? - briefly
Cats purr using their vocal cords and diaphragm muscle. This unique ability is not just a sign of contentment but also serves as a self-soothing mechanism for cats in stressful situations.
What part do cats purr with? - in detail
Cats purr using their larynx, which is located in their throat. The sound is produced by the rapid opening and closing of the glottis, the space between the vocal cords in the larynx. This process causes air to be pushed through the partly closed glottis, creating a vibration that we perceive as a purr.
The frequency of a cat's purr is typically between 25 and 150 Hertz (Hz), which is within the range of human hearing. This low-frequency sound has been shown to have therapeutic benefits, including promoting bone healing and relieving stress in both cats and humans.
In addition to the larynx, other parts of a cat's body contribute to the purring sound. The diaphragm, a muscle located below the lungs, contracts and relaxes to push air out of the lungs and into the vocal cords. This action helps to create the continuous vibration necessary for purring.
Interestingly, cats can purr both inhaling and exhaling, which is unusual among mammals. This ability allows them to maintain a constant purring sound without interruption.
While the exact mechanism of purring is still not fully understood, it is clear that this behavior serves multiple purposes for cats. Purring can indicate contentment, happiness, or even a sign of stress or fear. In some cases, cats may purr as a form of self-soothing or to communicate with their owners.