"Any piece of metal shutter and what not vibrates at a different frequency," he said.

What fairies actually do is to vibrate at such a high frequency that they are never in one place long enough to be seen.

The mind, the spirit, and the physical body are all composed of the same God Force energy; however, each is vibrating at a different frequency.

The power vibrated at a frequency far too low to hear, but he felt it.

These blades vibrate at an extremely high frequency allowing them to cut through almost any material with ease.

The mechanical system will then vibrate at a 'natural frequency' and gradually wind down.

When you hit the balloon, it vibrates at a certain frequency.

Shouldn't a note vibrating at a certain frequency have only one frequency?

Could fragrance be vibrating at a similar frequency to that of spirit?

How... Her brain felt like it was humming, vibrating at a really low frequency.