AES E-Library

AES E-Library

On Implications of the ISO 3382 Backward Integration Method for Automated Decay Rate Estimation

Methods for estimating the reverberation time in room acoustics have always been considered an important problem. A common approach uses Schröder’s backward integration method because it reduces variability, which is interpreted as meaning that it produces a more accurate estimate. This article analyzes this assumption in contexts applicable to both blind and nonblind estimation. Expressions for the estimation bias and variance of the reverberation decay rate are derived and verified using Monte Carlo simulations. The results confirm that backward integration does indeed significantly reduce the variance of decay rate estimates but at a cost of an increased and possibly large bias, which reduces the accuracy of the result. Prudence is therefore required when using backward integration for automated decay rate estimation tasks.

JAES Volume 63 Issue 3 pp. 161-173; March 2015
Publication Date:

Click to purchase paper as a non-member or login as an AES member. If your company or school subscribes to the E-Library then switch to the institutional version. If you are not an AES member and would like to subscribe to the E-Library then Join the AES!

This paper costs $33 for non-members and is free for AES members and E-Library subscribers.

Learn more about the AES E-Library

E-Library Location:


Start a discussion about this paper!

AES - Audio Engineering Society