As a matter of fact, Ants beat with their feet on earth very slightly and that slight sound can not be listened by us. But there are some other reasons as well I am mentioning them below.
In fact God has made our ears to function properly our ears can't hear the unnecessary voices and noise. For example, if you are in a noisy environment you can not listen at all what is being said, you would just hear the noise. And it is a blessing indeed for us.
Our ears can only hear the voice which is in between the frequency of 20Hz to 20000Hz. If a voice or sound is higher or lower than this frequency then in this case we can't hear that sound.
And this is the case with the footsteps of the ants. They produce the sound which is very low in frequency. And due to this reason we can not hear the sound made by the ants. I think my answer is very logical and you can understand it. You can also not hear a voice if its frequency is higher than the limits I've mentioned above. That's the reason dogs can hear the sounds which we can't and you can observe many other animals doing this.
Well, the answer to this question is quite easy to explain. First of all, ants are very small insects which can hardly be seen and felt. Even when they crawl up your bodies, you cannot completely feel them on your skin. Secondly, even when people walk barefoot be it on concrete or carpet, you can hardly hear your own footsteps because the sole of the feet is not exactly flat which is the reason why you cannot hear the sound of it. When we wear some kinds of shoes, it is still difficult to hear our own footsteps.
The other reason why we are not able to hear the footsteps is because the ants do not actually walk but they crawl like a snake. Their feet are too small to be called feet and can be called as scales of a snake as well. These are some of the reasons why we cannot hear the footsteps.
It has nothing to do with the frequency of the sound wave, it has to do with the amplitude. The amplitude determines the volume or magnitude of the sound, frequency has to do with pitch. The sound is just too faint for us to hear.
It has nothing to do with god either, I don't know why that was brought into the conversation, but that's a separate issue.
Because Its Sad Who Would Want To ..