猫咪呼噜声超治愈！铲屎官知道为什么小主子会打呼噜吗？(2)

2009年的一项研究发现，猫可以在呼噜声中隐藏一种哭喊声，类似于人类婴儿的哭声，从而激发主人的养育本能。该研究观察到，当猫发出呼噜声以求食物时，声音“更紧迫，不愉快”，这表明它们可以控制自己的呼噜声传达不同的信息。
至于猫咪呼噜声的疗愈功能就更加神奇了。
猫的呼噜声是猫在呼吸时喉咙周围的肌肉交替收缩和放松时所发出的声响。这种呼噜的频率对于缓解疼痛和骨修复很有帮助。
Cats often purr while under duress, such as during a visit to the veterinarian or when recovering from injury.
猫经常在受到胁迫时发出呼噜声，例如在看兽医或受伤恢复时。
就像人类在紧张痛苦的时候通过哭叫、大笑或者收拾自己的桌子来转移注意力，以达到疗愈的效果，猫咪通过这种呼噜声来让自己平静下来，毕竟收拾好心情才能面对兽医呢。
也难怪美剧《生活大爆炸》中谢尔顿生病时就会让别人唱“Soft Kitty”给他听:
“Soft kitty, warm kitty, little ball of fur! Happy kitty, sleepy kitty, purr purr purr!”
猫咪的purr purr声真的很治愈呢！
而呼噜声修复组织（tissue regeneration）的功能除了帮助猫咪自身疗伤，让其拥有“九条命”，对于人类也大有裨益。
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.
In fact, purr-like vibration devices have been patented for potential use in therapy, and some researchers have proposed strapping vibrating plates to astronauts" feet during long space flights to retain bone density.