Outputs (33)

FE Modelling Tibia Bone Vibration - The Influence of Shape, Twist, and Size (2024)
Journal Article
Scanlan, J., Umnova, O., & Li, F. (in press). FE Modelling Tibia Bone Vibration - The Influence of Shape, Twist, and Size. #Journal not on list, https://doi.org/10.61782/fa.2023.1141

The vibration response of bone has the potential to be used as a measure of bone strength for Osteoporosis detection. Modelling the vibration response requires capturing the shape of the long bones which have several complicated features. Yet modelli... Read More about FE Modelling Tibia Bone Vibration - The Influence of Shape, Twist, and Size.

Nonlinear behaviour of lossy acoustic black holes (2024)
Journal Article
Umnova, O., Brooke, D., Leclaire, P., & Dupont, T. (in press). Nonlinear behaviour of lossy acoustic black holes. #Journal not on list, https://doi.org/10.61782/fa.2023.0652

Sound absorption properties of acoustic black holes are studied for high pressure amplitudes. The absorbers consist of thin circular plates, each with a central perforation, separated by annular air cavities. Radius of the perforation of each plate d... Read More about Nonlinear behaviour of lossy acoustic black holes.

Urban Hedges as Noise Barriers: Does Plant Species Choice Affect Insertion Loss? (2024)
Journal Article
Webb, J., Cox, T., Blanusa, T., Griffiths, A., & Umnova, O. (in press). Urban Hedges as Noise Barriers: Does Plant Species Choice Affect Insertion Loss?. #Journal not on list, https://doi.org/10.61782/fa.2023.1152

Noise in urban environments is responsible for annoyance and adverse health effects. Noise barriers are used to mitigate noise and are effective when properly designed and installed, but provide little visual or biodiversity benefit. Hedges are frequ... Read More about Urban Hedges as Noise Barriers: Does Plant Species Choice Affect Insertion Loss?.

Multiple resonances in lossy acoustic black holes - theory and experiment (2022)
Journal Article
Umnova, O., Brooke, D., Leclaire, P., & Dupont, T. (2022). Multiple resonances in lossy acoustic black holes - theory and experiment. Journal of Sound and Vibration, 543, https://doi.org/10.1016/j.jsv.2022.117377

Acoustic properties of the metamaterial graded absorber, also known as ``acoustic black hole'', are studied in the linear regime. The absorber consists of thin metallic circular plates, each with a central perforation, separated by annular air caviti... Read More about Multiple resonances in lossy acoustic black holes - theory and experiment.

Acoustic wave propagation in permeable lossy metamaterials (2022)
Journal Article
Venegas, R., Núñez, G., Boutin, C., Umnova, O., & Zhang, Q. (2022). Acoustic wave propagation in permeable lossy metamaterials. Physics of Fluids, 34(1), 017117. https://doi.org/10.1063/5.0077342

This paper investigates acoustic wave propagation in gas-saturated permeable lossy metamaterials, which have different types of resonators, namely, acoustic and elastic resonators, as building-block elements. By using the two-scale asymptotic homogen... Read More about Acoustic wave propagation in permeable lossy metamaterials.

Acoustic metamaterial for low frequency sound absorption in linear and nonlinear regimes (2020)
Journal Article
Brooke, D., Umnova, O., Leclaire, P., & Dupont, T. (2020). Acoustic metamaterial for low frequency sound absorption in linear and nonlinear regimes. Journal of Sound and Vibration, 485, 115585. https://doi.org/10.1016/j.jsv.2020.115585

Acoustic metamaterial absorbers have been built and tested with focus on low frequency airborne sound absorption in linear and nonlinear regimes. The absorbers are made up of a series of piled up flat cavities, separated by thin walls and traverse... Read More about Acoustic metamaterial for low frequency sound absorption in linear and nonlinear regimes.

Nonlinear dynamics of coupled transverse-rotational waves in granular chains (2019)
Journal Article
Zhang, Q., Umnova, O., & Venegas, R. (2019). Nonlinear dynamics of coupled transverse-rotational waves in granular chains. Physical Review E, 100(6), 062206. https://doi.org/10.1103/PhysRevE.100.062206

The nonlinear dynamics of coupled waves in one-dimensional granular chains with and without a substrate is theoretically studied accounting for quadratic nonlinearity. The multiple time scale method is used to derive the nonlinear dispersion relati... Read More about Nonlinear dynamics of coupled transverse-rotational waves in granular chains.

Detection of osteoporosis from percussion responses using an electronic stethoscope and machine learning (2018)
Journal Article
Scanlan, J., Li, F., Umnova, O., Rakoczy, G., Lövey, N., & Scanlan, P. (2018). Detection of osteoporosis from percussion responses using an electronic stethoscope and machine learning. Bioengineering, 5(4), 107. https://doi.org/10.3390/bioengineering5040107

Osteoporosis is an asymptomatic bone condition that affects a large proportion of the elderly population around the world, resulting in increased bone fragility and increased risk of fracture. Previous studies had shown that the vibroacoustic respons... Read More about Detection of osteoporosis from percussion responses using an electronic stethoscope and machine learning.

Nonlocal boundary conditions for corrugated acoustic metasurface with strong near field interactions (2018)
Journal Article
Schwan, L., Umnova, O., Boutin, C., & Groby, J. (2018). Nonlocal boundary conditions for corrugated acoustic metasurface with strong near field interactions. Journal of Applied Physics, 123, 091712. https://doi.org/10.1063/1.5011385

The propagation of long-wavelength sound in the presence of a metasurface made by arranging acoustic resonators periodically upon or slightly above an impervious substrate is studied. The method of two-scale asymptotic homogenization is used to deriv... Read More about Nonlocal boundary conditions for corrugated acoustic metasurface with strong near field interactions.

Acoustics of multiscale sorptive porous materials (2017)
Journal Article
Venegas, R., Boutin, C., & Umnova, O. (2017). Acoustics of multiscale sorptive porous materials. Physics of Fluids, 29(8), 082006. https://doi.org/10.1063/1.4999053

This paper investigates sound propagation in multiscale rigid-frame porous materials that support mass transfer processes, such as sorption and different types of diffusion, in addition to the usual visco-thermo-inertial interactions. The two-scale a... Read More about Acoustics of multiscale sorptive porous materials.