TY - GEN
T1 - Using modal analysis principles to develop an improved method to measure impact insulation in multistory buildings
AU - Girdhar, S.
AU - Barnard, A.
N1 - Funding Information:
The authors would like to thank the president of GrassWorx LLC, Mr. Carey Widder, for his financial and technical support throughout the project. The authors would also like to thank the Dynamic Systems Laboratory faculty and students at Michigan Technological University for their support and guidance throughout this work.
Publisher Copyright:
© 2020 Proceedings of ISMA 2020 - International Conference on Noise and Vibration Engineering and USD 2020 - International Conference on Uncertainty in Structural Dynamics. All rights reserved.
PY - 2020
Y1 - 2020
N2 - Multistory building methods are moving towards hard floors, such as wood or ceramic tile, that require a flat and rigid base. This base is typically a poured gypsum layer over the subfloor. These hard flooring systems result in high transmitted impact noise to occupants through the floor-ceiling assemblies. One way to classify these assemblies is Impact Insulation Class (IIC). This metric is measured in a laboratory setting using a small-scale representation of the floor-ceiling assembly. The small-scale nature of the sample and the limitations of the test facilities result in inaccurate results in the low-frequency bands. This paper uses modal analysis principles coupled with structural acoustics theory to propose a new qualification procedure for impact noise using a comparison technique. A comparison sample is developed, representing a simply supported plate, and used as a sound power calibration sample for any test environment. Modal analysis is used to characterize the calibration samples. Results of the small-scale testing show sound power accuracies within 1 dB in low-frequency third octave bands.
AB - Multistory building methods are moving towards hard floors, such as wood or ceramic tile, that require a flat and rigid base. This base is typically a poured gypsum layer over the subfloor. These hard flooring systems result in high transmitted impact noise to occupants through the floor-ceiling assemblies. One way to classify these assemblies is Impact Insulation Class (IIC). This metric is measured in a laboratory setting using a small-scale representation of the floor-ceiling assembly. The small-scale nature of the sample and the limitations of the test facilities result in inaccurate results in the low-frequency bands. This paper uses modal analysis principles coupled with structural acoustics theory to propose a new qualification procedure for impact noise using a comparison technique. A comparison sample is developed, representing a simply supported plate, and used as a sound power calibration sample for any test environment. Modal analysis is used to characterize the calibration samples. Results of the small-scale testing show sound power accuracies within 1 dB in low-frequency third octave bands.
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M3 - Conference contribution
AN - SCOPUS:85105827504
T3 - Proceedings of ISMA 2020 - International Conference on Noise and Vibration Engineering and USD 2020 - International Conference on Uncertainty in Structural Dynamics
SP - 1497
EP - 1510
BT - Proceedings of ISMA 2020 - International Conference on Noise and Vibration Engineering and USD 2020 - International Conference on Uncertainty in Structural Dynamics
A2 - Desmet, W.
A2 - Pluymers, B.
A2 - Moens, D.
A2 - Vandemaele, S.
PB - KU Leuven - Departement Werktuigkunde
T2 - 2020 International Conference on Noise and Vibration Engineering, ISMA 2020 and 2020 International Conference on Uncertainty in Structural Dynamics, USD 2020
Y2 - 7 September 2020 through 9 September 2020
ER -