🐈️ Scientists have demonstrated that cats produce the purr through intermittent signaling of the laryngeal and diaphragmatic muscles. Cats purr during both inhalation and exhalation with a consistent pattern and frequency between 25 and 150 Hertz.⁠ ⁠ Various investigators have shown that sound frequencies in this range can improve bone density and promote healing.⁠ This association between the frequencies of cats' purrs and improved bone and muscle healing may help some humans.⁠ ⁠ ⁠ ⁠ #cat #cutecat #purring #purr #healingprocess #science #biology