An acoustically "dead" room is best described as:

• A. A room with sound-reducing materials and/or designed for audio recordings, resulting in limited echoes.
• B. A room with high ceilings and many reflective surfaces.
• C. A noisy room with loud HVAC systems.
• D. An ordinary office with standard furnishings.

Answer: (A)

An acoustically dead room focuses on absorbing sound rather than reflecting it. It is designed with sound-absorbing materials and layout to minimize echoes, producing a short reverberation time. This makes it ideal for audio recordings or speech clarity because sound doesn’t bounce around the room.

That description fits best because it explicitly mentions sound-reducing materials and limited echoes, which are the defining features of a dead room.

The other scenarios imply conditions that would not deaden reflections: high ceilings and many reflective surfaces create a more live room with more echoes; a noisy room adds unwanted background noise rather than reducing reflections; an ordinary office with standard furnishings isn’t specifically engineered to minimize reflections.