In-Situ Measurements of Normal Impedance and Sound Absorption Coefficient of Hard Materials by using a Laser Doppler Vibrometer

Saccenti L, Armelloni E, Farina A, Bevilacqua A, Lavagna L. In-Situ Measurements of Normal Impedance and Sound Absorption Coefficient of Hard Materials by using a Laser Doppler Vibrometer. In: AES Convention 153. Audio Engineering Society; 2022. Paper 31. Available from: https://aes.org/publications/elibrary-page/?id=21913

@inproceedings{Saccenti2022_21913,
  author = {Saccenti, Leonardo and Armelloni, Enrico and Farina, Adriano and Bevilacqua, Antonella and Lavagna, Lorenzo},
  title = {{In-Situ Measurements of Normal Impedance and Sound Absorption Coefficient of Hard Materials by using a Laser Doppler Vibrometer}},
  booktitle = {AES Convention 153},
  note = {Paper 31},
  year = {2022},
  month = oct,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=21913}
}

TY  - CPAPER
TI  - In-Situ Measurements of Normal Impedance and Sound Absorption Coefficient of Hard Materials by using a Laser Doppler Vibrometer
AU  - Saccenti, Leonardo
AU  - Armelloni, Enrico
AU  - Farina, Adriano
AU  - Bevilacqua, Antonella
AU  - Lavagna, Lorenzo
T2  - AES Convention 153
M1  - Paper 31
PY  - 2022
DA  - 2022/10/06
UR  - https://aes.org/publications/elibrary-page/?id=21913
PB  - Audio Engineering Society
LA  - en
AB  - Standard techniques to measure the sound absorption coefficient or the acoustic impedance of materials are the Kundt’s tube and the reverberant room, albeit they are not practicable in-situ. In addition, these measurement methodologies involve extracting small or large samples of the material under test, which is not permitted for materials of historical importance. In this paper, the possibility of determining the normal acoustic impedance and the normal sound absorption coefficient based on direct in-situ measurements using a Laser Doppler Vibrometer (LDV) has been analyzed. Specifically, measurements have been conducted avoiding any contact on historical sandstones, bricks, and wood planks of the Greek-Roman Theater of Tyndaris located in Sicily (Italy).
ER  -