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All Outputs (39)

Detailed directivity measurements of aerodynamic sound sources (2015)
Presentation / Conference
Elliott, A., Meggitt, J., & Moorhouse, A. (2015, April). Detailed directivity measurements of aerodynamic sound sources. Presented at Noise and Vibration - Emerging Technologies, Dubrovnik, Croatia

The sound radiated by a vibrating surface can be modelled using combinations of elementary sources but for aerodynamic noise sources it less clear how to do so. It is proposed here that the arrangement and number of ideal sources required to represen... Read More about Detailed directivity measurements of aerodynamic sound sources.

Omnidirectional acoustic absorber with a porous core and a metamaterial matching layer (2014)
Journal Article
layer. Journal of Applied Physics, 115(20), 204902. https://doi.org/10.1063/1.4876119

An omnidirectional sound absorber based on the acoustic analogy of the electromagnetic metamaterial
“black hole” has been developed and tested. The resulting structure is composed of a hollow
cylindrical porous absorbing core and a graded index mat... Read More about Omnidirectional acoustic absorber with a porous core and a metamaterial matching layer.

The “round trip” theory for reconstruction of Green's functions at passive locations (2013)
Journal Article
Moorhouse, A., & Elliott, A. (2013). The “round trip” theory for reconstruction of Green's functions at passive locations. ˜The œJournal of the Acoustical Society of America (Online), 134(5), 3605. https://doi.org/10.1121/1.4821210

An expression for the Green's function at an arbitrary set of passive locations (no applied force) is derived and validated by experiment. Three sets of points are involved, the passive reconstruction points, c, which lie on a virtual boundary and tw... Read More about The “round trip” theory for reconstruction of Green's functions at passive locations.

In-situ source path contribution analysis of structure borne road noise (2013)
Journal Article
Elliott, A., Moorhouse, A., Huntley, T., & Tate, S. (2013). In-situ source path contribution analysis of structure borne road noise. Journal of Sound and Vibration, 332(24), 6276-6295. https://doi.org/10.1016/j.jsv.2013.05.031

Source-path-contribution (SPC) analysis, also known as transfer path analysis (TPA), is a technique widely used in the automotive industry for rank ordering noise and vibration sources. The SPC approach is known to provide reliable diagnostic informa... Read More about In-situ source path contribution analysis of structure borne road noise.

An air spring (2012)
Patent
Coakley, J., & Elliott, A. (2012). An air spring

There is provided an air spring (1) for supporting a load, the air spring (1) comprises a chamber (50) for holding a pressurised gas in use, a load-bearing surface (10) arranged to transmit a force from a load in use to the pressurised gas held in th... Read More about An air spring.

Human response to vibration in residential environments, technical report 1 : measurement of vibration exposure (2012)
Report
Peris, E., Sica, G., Woodcock, J., Koziel, Z., Elliott, A., Venegas Castillo, R., …Waddington, D. (2012). Human response to vibration in residential environments, technical report 1 : measurement of vibration exposure

The Technical Report 1 describes the research undertaken to develop a method by which human exposure to vibration in residential environments can be assessed. That work has been carried out by the University of Salford supported by the Department of... Read More about Human response to vibration in residential environments, technical report 1 : measurement of vibration exposure.

Noise and vibration from building-mounted micro wind turbines Part 2: Results of measurements and analysis (2011)
Report
Part 2: Results of measurements and analysis

Description

To research the quantification of vibration from a micro turbine, and to develop a method of prediction of vibration and structure borne noise in a wide variety of installations in the UK.

Objective

The objectives of the study... Read More about Noise and vibration from building-mounted micro wind turbines Part 2: Results of measurements and analysis.

Noise and vibration from building-mounted micro wind turbines Part 1: Review and proposed methodology (2011)
Report
Moorhouse, A., Elliott, A., Eastwick, G., von Hünerbein, S., & Waddington, D. (2011). Noise and vibration from building-mounted micro wind turbines Part 1: Review and proposed methodology

Description

To research the quantification of vibration from a micro turbine, and to develop a method of prediction of vibration and structure borne noise in a wide variety of installations in the UK.

Objective

The objectives of the study... Read More about Noise and vibration from building-mounted micro wind turbines Part 1: Review and proposed methodology.

Noise and vibration from building-mounted micro wind turbines part 3 : prediction methodology (2011)
Report
part 3 : prediction methodology

This brief report describes a simplified method for estimation of
levels of structure-borne sound in buildings to which a micro-wind
turbine (MWT) is attached. The method is applicable to two specific
designs of MWT, each for three lengths of moun... Read More about Noise and vibration from building-mounted micro wind turbines part 3 : prediction methodology.

Structure-borne sound and vibration from building-mounted wind turbines (2011)
Journal Article
Moorhouse, A., Elliott, A., Eastwick, G., Evans, T., Ryan, A., von Hünerbein, S., …Waddington, D. (2011). Structure-borne sound and vibration from building-mounted wind turbines. Environmental Research Letters, 6(3), 035102. https://doi.org/10.1088/1748-9326/6/3/035102

Noise continues to be a significant factor in the development of wind energy resources. In the case of building-mounted wind turbines (BMWTs), in addition to the usual airborne sound there is the potential for occupants to be affected by structure-bo... Read More about Structure-borne sound and vibration from building-mounted wind turbines.

Some relationships for coupled structures and their application to measurement of structural dynamic properties in situ (2011)
Journal Article
Moorhouse, A., Evans, T., & Elliott, A. (2011). Some relationships for coupled structures and their application to measurement of structural dynamic properties in situ. Mechanical Systems and Signal Processing, 25(5), 1574 - 1584. https://doi.org/10.1016/j.ymssp.2010.12.016

Three relationships are presented for indirect determination of the structural dynamic properties of substructures, namely the blocked force, mobility and free velocity. First, it is shown that the blocked force of a vibration source can be obtained... Read More about Some relationships for coupled structures and their application to measurement of structural dynamic properties in situ.

In-situ characterisation of structure borne noise from a building mounted wind turbine (2010)
Presentation / Conference
building mounted wind turbine. Presented at ISMA 2010, Katholieke Universiteit Leuven, Belgium

Building mounted micro wind turbines (BMWTs) could potentially provide a useful contribution to
renewable energy production but a means of predicting structure-borne sound and vibration is required. A
particular difficulty is that BMWTs can only be... Read More about In-situ characterisation of structure borne noise from a building mounted wind turbine.

On the use of experimental ensembles in a hybrid deterministic-statistical energy analysis method
Presentation / Conference
Clot-Razquin, A., Langley, R., Meggitt, J., Moorhouse, A., & Elliott, A. On the use of experimental ensembles in a hybrid deterministic-statistical energy analysis method. Presented at International Conference on Noise and Vibration Engineering (ISMA) / International Conference on Uncertainty in Structural Dynamics (USD) 2020, Leuven, Belgium

There is a clear need in modern industries for models that can predict the vibro-acoustic response of their manufactured products at the design stage. Models based on the hybrid deterministic-statistical method are a suitable solution to overcome the... Read More about On the use of experimental ensembles in a hybrid deterministic-statistical energy analysis method.

Component replacement transfer path analysis
Presentation / Conference
Meggitt, J., Elliott, A., Moorhouse, A., Jalibert, A., & Franks, G. Component replacement transfer path analysis. Presented at International Conference on Noise and Vibration Engineering (ISMA) / International Conference on Uncertainty in Structural Dynamics (USD) 2020, Leuven, Belgium

In-situ Transfer Path Analysis (TPA) is a diagnostic method used to analyse the propagation of noise and vibration through complex built-up structures. Its defining feature is the independent characterisation of an assembly's vibratory source in term... Read More about Component replacement transfer path analysis.

Structure-Borne sound characterization of coupled structures—part II: Feasibility study
Journal Article
Pavić, G., & Elliott, A. Structure-Borne sound characterization of coupled structures—part II: Feasibility study. Journal of Vibration and Acoustics, 132(4), 041009. https://doi.org/10.1115/1.4000981

A novel method has been outlined in the first part of this paper aimed at characterization of structure-borne sound transmission from a vibration source coupled via resilient mounts to a receiver. It can deliver the source mobility and its free veloc... Read More about Structure-Borne sound characterization of coupled structures—part II: Feasibility study.

Structure-Borne sound characterization of coupled structures—part I: Simple demonstrator model
Journal Article
Pavić, G., & Elliott, A. Structure-Borne sound characterization of coupled structures—part I: Simple demonstrator model. Journal of Vibration and Acoustics, 132(4), 041008. https://doi.org/10.1115/1.4000980

A method has been developed to characterize a vibration source when coupled via resilient mounts to a receiver structure. This two-step measurement procedure can deliver the mobility and free velocity of a source, together with the mobility of the re... Read More about Structure-Borne sound characterization of coupled structures—part I: Simple demonstrator model.

Moment excitation and the measurement of moment mobilities
Journal Article
Elliott, A., Moorhouse, A., & Pavić, G. Moment excitation and the measurement of moment mobilities. Journal of Sound and Vibration, 331(11), 2499-2519. https://doi.org/10.1016/j.jsv.2012.01.022

Frequency response functions (FRF), such as mobilities, are widely used in the analysis of vibration and structure-borne sound and it is important that this FRF data can be measured accurately for all important degrees of freedom. In some cases three... Read More about Moment excitation and the measurement of moment mobilities.

Passive acoustic thermometry
Presentation / Conference
Elliott, A. Passive acoustic thermometry. Presented at Internoise 2016, Hamburg

Conventional acoustic thermometry is usually performed by exciting a resonator with a sound source and identifying the resonant frequencies of the system. If the dimensions of such system are known it is relatively straightforward then to determine t... Read More about Passive acoustic thermometry.