Until today, only few acoustic prediction software packages utilize complex directivity data to characterize sound sources, such as line arrays. This work gives some theoretical background on the significance of phase data for the prediction of combinations of coherent sound sources. A mathematical model is introduced that allows evaluating the error ranges for several loudspeaker measurement methods. It is shown that, in contrast to what one would naively expect, the choice of the reference point for measuring complex data is rather irrelevant within given limits. These limits are derived based on the propagation equation for spherical waves. It is further shown analytically that the use of phase data reduces the measurement error to be expected by at least an order of magnitude.
Authors:
Ahnert, Wolfgang; Feistel, Stefan
Affiliations:
ADA Acoustic Design Ahnert; SDA Software Design Ahnert GmbH(See document for exact affiliation information.)
AES Convention:
119 (October 2005)
Paper Number:
6632
Publication Date:
October 1, 2005
Subject:
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.
To be notified of new comments on this paper you can subscribe to this RSS feed. Forum users should login to see additional options.
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.