It was a vital, somehow fresh, new-sounding drone, covering most of the sound spectrum audible to an Earthman.

Occasionally he caught complex rhythmical patterns racing up and down through the audible spectrum, to vanish at the upper or lower edge of hearing.

Except for a small high-pitched whine far back in the audible spectrum, sounds and voices reached her without distortion.

Much of the sound was in the audible spectrum, a caressing wave of soprano cries.

His designs derive from the recognition that it is difficult for any single audio component to span the entire audible spectrum.

In addition, this player features a so-called noise-shaping circuit that moves any residual noise beyond the audible spectrum.

The most advanced model of this kind, the Technics SH-8066, starts out by emitting a test tone comprising all the frequencies in the audible spectrum.

The other is the passenger compartment, which is small enough to resonate at certain frequencies within the audible spectrum.

This condition is satisfied if the frequency response is flat from one end of the audible spectrum to the other.

When this happens, the ear does not pick up as much noise at the low end of the audible spectrum, so the loud noise is dampened.