| Issue |
Acta Acust.
Volume 10, 2026
|
|
|---|---|---|
| Article Number | 30 | |
| Number of page(s) | 16 | |
| Section | Acoustic Materials and Metamaterials | |
| DOI | https://doi.org/10.1051/aacus/2026022 | |
| Published online | 24 April 2026 | |
Supplementary material
Table S1. Measured normal-incidence absorption coefficients of glass-wool (6 cm) and bioboard (6 cm) samples, averaged over third-octave bands.
Table S2. Complex characteristic wave numbers for glass-wool (6 cm) and bioboard (6 cm) samples, averaged over third-octave bands.
Table S3. Complex characteristic impedance for glass-wool (6 cm) and bioboard (6 cm) samples, averaged over third-octave bands.
Download File(s) |
Figure S1.
Frequency-domain free-field sound-speed estimates from (a) receiver column 2, and (b) receiver column 3. The primary (left) y-axis shows microphone height. Sound speed is encoded by the colour map; the colour-bar ticks are identical to those of the secondary (right) y-axis. For each grazing angle, dashed lines denote the mean sound speed and error bars indicate the range of estimates, both referenced to the secondary y-axis. |
© The Author(s), Published by EDP Sciences, 2026
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