soundproof

comparative more soundproof · superlative most soundproof

1. Not allowing sound through.

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

   1 more example

   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 […]

   2013, K. H. Pribram, A. R. Luria, Psychophysiology of the Frontal Lobes, page 92

present singular third person soundproofs · participle present soundproofing · participle past soundproofed · past soundproofed

1. To make resistant to transmitting sound.

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

   2 more examples

   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.

   1960 March, G. Freeman Allen, “Europe's most luxurious express - the "Settebello"”, in Trains Illustrated, page 141

   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.

   1980, Robert M. Jones, editor, Walls and Ceilings, Time-Life Books, →ISBN, page 114