What is the common name for fiberboard that is designed with holes for acoustic purposes?

The common name for fiberboard designed with holes for acoustic purposes is "combustible acoustical tile." This type of product is specifically engineered to help reduce noise levels in a given space by absorbing sound. The perforations or holes in the fiberboard allow it to trap and dissipate sound waves, minimizing echo and improving the overall acoustical quality of the environment.

In contrast, while "acoustical wall panel," "soundproof board," and "noise-absorbing panel" may describe products with similar functions, they do not specifically denote the fiberboard type characterized by its combustibility and perforated design. "Acoustical wall panel" typically refers to a broader category of products used for sound absorption, which can include various materials beyond fiberboard. "Soundproof board" implies an ability to completely block sound transmission, which is not the primary function of acoustical tiles that absorb rather than block sound. Lastly, "noise-absorbing panel" can refer to a range of materials that achieve sound dampening, but without the specific mention of fiberboard or its combustibility, it lacks the precision that "combustible acoustical tile" provides.