He couldn't see any amplification devices, but the past few years of administering at temple had given him a more than adequately audible public-speaking voice.

In an emergency, a person who has a hearing loss may be using a telephone that does not have an amplification device.

The amplification device itself seemed to be quite unremarkable, a featureless, rectangular box of some matte black material.

Spock nodded gravely and hurried to the amplification device.

A triode is an electronic amplification device having three active electrodes.

His "sunglasses" are actually a light amplification device, giving him better than average night-vision.

A portable amplification device, similar to a coxbox, incorporating a digital readout.

His area of expertise was electron tube technology, and specifically light amplification devices for night vision.

However, these amplification devices remain separate from the amplified instrument and reproduce its natural sound accurately.

Custom-made amplification devices with FM communicators used by teachers help focus on individual needs.