AES E-Library

Early Energy Conditions in Small Rooms and in Convolutions of Small-Room Impulse Responses

A simplified prediction model for the early-to-late energy ratio has been tested for small rooms that are typically used in video conferences. The prediction model is a modified diffuse-field model, using Barron’s revised formula for a distance-dependent reverberation level, together with Vorländer’s revised formula for a constant reverberation level. Measurements have been carried out in a few rooms and early- and total-energy levels have been compared with predictions according to the simplified model and predicted octave-band levels are typically within 1 dB of measured values, for the frequency range of 250 Hz to 2 kHz. Measured impulse responses were then convolved to simulate a video conference setup and simplified predictions of the early-to-late energy ratios, C50, for convolved impulse responses gave prediction errors that were on average around 1.5 dB as compared with (convolved) measurements.

Authors: el-Banna Zidan, Hassan; Svensson, U. Peter
Affiliation: Norwegian University of Science and Telecommunications, Trondheim, Norway
AES Convention:129 (November 2010) Paper Number:8223 Import into BibTeX
Subject:Virtual Rooms

Click to purchase paper 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 $20 for non-members, $5 for AES members and is free for E-Library subscribers.

Learn more about the AES E-Library

E-Library Location: (CD 129Papers)   /129/8223.pdf

Start a discussion about this paper!