Additional Content: Audio Test Signals for Acoustical Alignment, Listening Level
Once sound system optimization is completed propagation tests should be conducted with appropriate test signals and loudness normalized programme material at a pre-calibrated output level of ‘0 LU’ in ‘EBU mode’ \(=\) –23 LUFS.[1]
A recommended type of test signal is broadband Brownian noise, as this has a frequency spectrum that approximates real musical material. The following WAV files were prepared with Audacity audio editing software:
Brownian Noise STEREO -23 LUFS non-coherent L&R 48 kHz.wav
Brownian Noise STEREO -23 LUFS non-coherent L&R 44,1 kHz.wav
Brownian Noise MONO -23 LUFS 48 kHz.wav
Brownian Noise MONO -23 LUFS 44,1 kHz.wav
All loudspeakers should be operational during the propagation test, with the overall acoustic gain adjusted to fit local conditions.
N.B. This differs from R 128 Acoustical Alignment, Listening Level instructions in EBU TECH 3343, pp. 22–23.
Fair Loudness Measures for Live Events
To accompany the instructional presentation (see link below).
Right-click link to download the self-contained HTML file, or view in browser:
| KEY | ACTION |
|---|---|
| → , ↓ , SPACE , N , L , J | next slide |
| ← , ↑ , P , H , K | previous slide |
| E | PDF export mode |
Case studies
Please contact the authors if you are interested in collaborating with us and using your event as a case study. The findings will be used to improve and expand specific guidance.
Thank you!
Image: Brownian motion (litho), English School, (20th century) / Private Collection / © Look and Learn / Bridgeman Images