Mural: Painting applied to and made integral with the surface of a wall or ceiling.

壁画：描绘在建筑物墙壁和天花板上并与其成为一体的绘画。

youdao

There is a kind of rough wall surface, which is said to be sound-absorbing.

有一种墙面是麻的，据说可以吸音。

《新英汉大辞典》

There is a kind of rough wall surface, which is said to be sound-absorbing.

有一种墙面是麻的，据说可以吸音。

《新英汉大辞典》