Question

in general a dog's hearing is about how many times is stronger than human

Answer 1

Of course, once their sense of hearing develops, it far surpasses that of a human. In fact, your dog should be able to hear noises from four times the distance of a person with average hearing capabilities. Dogs can also hear noises at a much higher frequency than humans.

By the time their sense of hearing has developed, they can already hear 4 times the distance of a human with normal hearing. Dogs can hear higher pitched sounds and can detect a frequency range of 67-45,000 Hz, compared to a human range of 64-23,000 Hz