Synchronized Swept-Sine: Theory, Application, and Implementation - October 2015
Effect of Microphone Number and Positioning on the Average of Frequency Responses in Cinema Calibration - October 2015
The Measurement and Calibration of Sound Reproducing Systems - July 2015
The Significance of Phase Data for the Acoustic Prediction of Combinations of Sound Sources
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.
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.