Low frequency normal modes of an enclosed soundfield introduce unwanted frequency, spatial and temporal artefacts to reproduced electroacoustic signals. A novel control approach has been reported [1,2] based on an analytical modal decomposition, using a low frequency soundfield model in a one-dimensional environment formed from the sum of a number of second order IIR filter sections. In this paper, these techniques are applied to the low frequency resonances of a three dimensional test room. It is shown that significant reductions in modal Q and corresponding reductions in modal decay times may be achieved, leading to smaller low-frequency soundfield variance and decreasing audibility of time-domain modal artefacts.

Author: Avis, Mark R.
Affiliation: Acoustics Research Centre, School of Acoustics and Electronic Engineering, University of Salford, Salford, Greater Manchester, UK
AES Conference: 21st International Conference: Architectural Acoustics and Sound Reinforcement (June 2002)
Paper Number: 000058
Publication Date: June 1, 2002
Subject: Architectural Acoustics & Sound Reinforcement

Click to purchase paper as a non-member or you can login as an AES member to see more options.

No AES members have commented on this paper yet.

Subscribe to this discussion

To be notified of new comments on this paper you can subscribe to this RSS feed. Forum users should login to see additional options.

Start a discussion!

If you would like to start a discussion about this paper and are an AES member then you can login here:
Username:
Password:

If you are not yet an AES member and have something important to say about this paper then we urge you to join the AES today and make your voice heard. You can join online today by clicking here.