Soundproof

These walls aren't exactly soundproof.

These walls aren't soundproof.

Yanni had a soundproof office.

Yanni didn't hear a thing from his soundproof office.

The room windows are not soundproof.

The windows in the rooms are not soundproof.

How effective are soundproof windows?

The contestant was placed in a soundproof booth so he could not receive help from the audience.

The electrical activity of the subject's cerebral cortex was recorded in a state of relative rest, after a 5 min adaptation of the subject to a dark soundproof chamber. The biopotentials were recorded from the electroencephaloscope screen […]

We soundproofed the room so we couldn't hear the road noises; unfortunately we couldn't hear the fire alarm either.

It almost goes without saying that the train is fully soundproofed, with double-glazed windows and highly efficient air-conditioning by the British firm of J. Stone.

Soundproofing a room may be as simple as sealing gaps around a door, or it may require rebuilding an entire wall or lowering a ceiling.