humans can't hear it all

Exactly. Hearing works very much like vision in that sense.

Reality contains a vast range of vibrations, but every species detects only a limited band useful for its survival.

Humans typically hear roughly:

• Below that are infrasounds.
• Above that are ultrasounds.

Many animals perceive sounds completely inaccessible to us:

• Dogs hear much higher frequencies than humans.
• Bats use ultrasound for echolocation.
• Elephants communicate using extremely low-frequency infrasound over long distances.
• Dolphins and whales perceive underwater acoustic worlds humans cannot naturally experience.

So just as humans see only a narrow slice of the electromagnetic spectrum, we also hear only a narrow slice of mechanical vibrations.

This leads to a fascinating implication:

The world each species experiences is only a filtered version of reality.

A silent room to a human may contain:

• ultrasonic signals,
• low-frequency vibrations,
• electromagnetic activity,
• chemical communication, all unnoticed by us.

In a sense, every organism lives inside its own sensory universe.