What is the maximum sound level of a bedroom audible at the pillow?

The correct answer regarding the maximum sound level of a bedroom audible at the pillow, which is typically considered around 100 dBA, means that 110 dBA is quite elevated and usually associated with high noise environments like rock concerts or very loud machinery rather than typical bedroom conditions.

In a domestic setting, particularly in a bedroom, it's vital to maintain a quieter environment to promote rest and relaxation. The levels referenced in the question tend to be assessed in dBA, which measures sound intensity with adjustable weighting to account for human ear response. A sound level around 85 dBA is often considered the threshold at which sound can start to cause hearing damage over prolonged exposure; thus, 100 dBA exceeds safe and comfortable listening levels, making it unsuitable for a bedroom environment.

Choosing 110 dBA would imply an excessively loud sound level that is not conducive to a proper sleep setting, while levels typically found in residential areas would be significantly lower. Sound levels at or around the pillow in a well-kept bedroom environment should be below 85 dBA for comfort and health.