揭秘：为什么狗对着空气汪汪叫？

养狗的人会知道，狗有时候会对着空荡荡的地方无缘无故地汪汪叫。狗这样汪汪叫的时候到底在想什么呢？

养狗的人会知道，狗有时候会对着空荡荡的地方（也可以说是空气）无缘无故地汪汪叫。这真的很挑战狗主人的神经，狗这样汪汪叫的时候到底在想什么呢？

A dog can be a person’s best friend, or so the theory goes. But that relationship can be tested when a dog begins barking at an empty corner of a room, at a door, or anywhere where there doesn’t appear to be any activity at all taking place. Is the dog hallucinating? Is it communicating with interdimensional beings? Or does it simply want to drive its owner to the brink of sanity?

从常理上来讲，狗是人类最好的朋友。但是当一条狗对着房间里空荡荡的角落、对着门或对着任何一个没有动静的地方汪汪叫，人与狗的友情可能就要面临考验了。这是狗出现幻觉了吗？还是狗正在和跨维度空间的生命交谈？亦或是狗只是想把主人逼疯？

According to the American Kennel Club, the most common explanation for unprompted woofing is that it’s not really unprompted at all. Instead, it’s likely that humans are simply unable to perceive whatever visual, aural, or olfactory cues the dog is sensing.

美国养犬俱乐部称，对于毫无来由的汪汪叫最常见的解释是它可能并不是真的无缘无故，只不过人类无法察觉到狗能感知到的视觉、听觉和嗅觉线索。

Dogs are, obviously, equipped with superior hearing, including the ability to detect sounds that are higher in pitch. In theory, a dog could be reacting to a noise that a person nearby wouldn’t be able to hear—possibly a far-off vehicle siren.

显然，狗具有超级敏锐的听力，能听到更高音调的声音。理论上，狗可能是在对某种声音作出反应，可能是远处车辆的鸣笛声，而狗身边的人听不到这个声音。