What is the approximate decibel reduction achieved by doubling absorption in reverberant spaces?

Doubling the absorption in reverberant spaces leads to an approximate reduction of about 3 decibels (dB). This phenomenon is grounded in the principles of acoustics, particularly the way sound energy behaves in an enclosed environment. When absorption is doubled, the sound energy that is absorbed increases significantly, which in turn reduces the overall sound pressure level encountered in that space.

In decibel terms, sound pressure levels are logarithmic, meaning that an increase or decrease of 3 dB corresponds to a doubling or halving of sound intensity. Thus, when absorption doubles, it effectively halves the reverberant sound energy present in the space, translating to that 3 dB reduction.

This understanding is crucial in acoustics and industrial hygiene when considering how to manage noise in various environments, as it helps inform decisions on materials and design when seeking to achieve specific acoustic characteristics.