What term describes a room that dulls sound due to its thick sound absorbers?

The term that describes a room designed to dull sound through the use of thick sound absorbers is known as a "dead room." In a dead room, sound absorption materials are used extensively on walls, ceilings, and possibly floors to minimize sound reflections and reverberation. This creates an acoustically neutral environment, which is particularly useful in settings where clarity of sound is essential, such as in recording studios, research, or sound testing facilities.

This term emphasizes the absence of audible sound reflections, which is vital when precise sound measurements or high-fidelity recordings are required. The concept of a dead room ensures that external noises and echoes do not interfere with the intended audio experience, which aids in clear dialogue capture and accurate sound design, making it a crucial aspect of many audio-related practices.