When Feng Yi felt the vibration of the ground beneath his feet, he knew where the next change was going to happen.
Natural snakes have no external ears; they only possess middle and inner ears and may not hear sound waves transmitted through air. However, they can detect the slightest vibration through their sensitive columella, which then transmits the vibrational wave to the inner ear, from where the auditory nerve passes the information to the brain.
The slightest ground vibrations are detected by them, so in ancient times, some people predicted earthquakes by observing the behavior of snakes.
Snake charmers also use this fact, creating vibrations to send signals to the snakes in the basket, coaxing them to "come out and do business."
It's not that snakes are deaf; they just "listen" differently.
Feng Yi was now experiencing exactly this. The soles of his feet were the clearest receptors, and when he stepped on the ground, he could feel all sorts of vibrations.