noun
noise barrier; soundproof wall
A wall or barrier designed to block or reduce noise, typically used along highways or railways.
高速道路の両側に遮音壁が設置された。
Noise barriers were installed on both sides of the expressway.
遮音壁のおかげで、家の中は静かになった。
Thanks to the soundproof wall, the inside of the house became quiet.
Compound of 遮音 (sound insulation) and 壁 (wall).