How do cats make the purring sound? - briefly
Cats produce purring sounds through the rapid vibration of their laryngeal muscles, which occurs during both inhalation and exhalation, creating a continuous, soothing noise.
How do cats make the purring sound? - in detail
Cats produce the purring sound through a complex interaction between their brain, laryngeal muscles, and diaphragm. The process begins in the brain, where neural oscillators send repetitive signals to the laryngeal muscles, causing them to twitch rapidly. These muscles control the opening and closing of the glottis, the space between the vocal cords. As the cat breathes in and out, air passes through the vibrating glottis, creating the characteristic purring sound. The frequency of this vibration typically ranges between 25 and 150 Hertz, a range known to promote bone healing and tissue regeneration. Interestingly, purring occurs during both inhalation and exhalation, distinguishing it from other vocalizations like meowing, which only happen during exhalation. The diaphragm also contributes by regulating the flow of air, ensuring a steady rhythm. While purring is often associated with contentment, cats also purr when stressed, injured, or in pain, suggesting it serves multiple purposes, including self-soothing and communication. The exact mechanisms behind the neural control and evolutionary origins of purring remain subjects of ongoing research, but it is clear that this unique ability is a remarkable feature of feline anatomy and behavior.