Sound strength

Auditory sound strength is the level at which we experience sound. A reverberant room gives a higher sound level than a room with added sound absorption.


High level

Low level

The measurement Strength states the sound level in the real room in relation to the sound level in an anechoic room with the same sound source. The measurement demonstrates the room reflections’ effect on the sound level. 

Strength real room.

Real room 

Strength anechoic chamber

Anechoic chamber 

Perceived attribute Objective descriptor Designation Unit Explanation Standard

Auditory strength




Measure of the room’s contribution to the sound or noise level from a sound source.

ISO 3382-1