The only way I can think to describe is kind of like, you know when you’re driving over rumble strips in your car, and you can feel the vibration in your body? A human hearing sound would be like the vibrations at, say, a moderate speed, and a dog would hear/feel them at a slower speed. A hummingbird would feel them at so slow a speed, they could almost feel each bump separately.

I’m not sure how to explain the accompanying pitch, except that it’s like a shift in colour – when the sound slows down, it also lowers in pitch, so an analogy could be that if a human would hear a medium pitch (which we could call blue), a dog would hear a lower/deeper pitch (which in this analogy would be a deeper/darker blue).

Does that help, or am I making it more confusing?