If you're into high frequencies, buy this record, the treble's nearly off the scale.

At each level in the above diagram the signal is decomposed into low and high frequencies.

At the time of recording, the band was into extreme frequencies.

But tapping into ever-higher frequencies has its own problems.

When they fall into low frequencies, the brain becomes disconnected, unconscious and falls asleep.

The radio waves that the mobile phone networks use are split into different frequencies.

Lots of activity, though, and all the transmitters are dialed into different frequencies.

It does this by breaking the sound or picture into different frequencies.

"Their vocal equipment goes off the scale into higher frequencies, so you didn't get the full effect."

Manufacturers can push into higher frequencies in search of free space, but at the same time, the components needed become more expensive.