Dogs have excellent hearing, much better than humans. They can hear sounds at much higher frequencies and lower volumes than we can.
To answer your question in a way that makes sense, let's rephrase it:
How far away can a dog hear a sound?
The answer depends on many factors:
* The type of sound: Some sounds, like high-pitched whistles, travel further than low-frequency sounds.
* The environment: Noise and other factors can interfere with sound travel.
* The dog's breed: Some breeds have naturally better hearing than others.
Generally, dogs can hear sounds up to 4 times further away than humans. This means a dog might be able to hear a sound up to 1 kilometer away, while a human might only hear it at 250 meters.