All Outputs (38)

Operational measurement of frequency response functions (2024)
Journal Article
McGee, R., Elliott, A., Meggitt, J., & Smith, J. (in press). Operational measurement of frequency response functions. #Journal not on list, https://doi.org/10.61782/fa.2023.1265

A common problem that arises during modal testing is the inability to directly excite degrees-of-freedom to obtain frequency response functions (FRFs). It has been shown previously that reliable reproduction of FRFs via indirect excitation is difficu... Read More about Operational measurement of frequency response functions.

Prediction of Radiated Structural Noise Using Decomposed Vibro-Acoustic Frequency Response Functions (2024)
Journal Article
Barton, L., Elliott, A., & Smith, J. (in press). Prediction of Radiated Structural Noise Using Decomposed Vibro-Acoustic Frequency Response Functions. #Journal not on list, https://doi.org/10.61782/fa.2023.1125

The manner in which a system radiates noise is dependent upon the resonant behaviour and the forced vibration of the structure. It has been shown previously that the modes of such a system can be identified by performing a singular value decompositio... Read More about Prediction of Radiated Structural Noise Using Decomposed Vibro-Acoustic Frequency Response Functions.

Decomposed vibro-acoustic frequency response functions for the prediction of radiated sound (2023)
Thesis
Barton, L. (2023). Decomposed vibro-acoustic frequency response functions for the prediction of radiated sound. (Thesis). University of Salford

There are several methods employed to conduct analysis of vibrations in structures. These methods can be applied to various problems caused by vibrations, such as external noise, and also to monitor the behavior of the source or structure which is... Read More about Decomposed vibro-acoustic frequency response functions for the prediction of radiated sound.

Development of electric scooter alerting sounds using psychoacoustical metrics (2022)
Journal Article
Walton, T., Torija Martinez, A., & Elliott, A. (2022). Development of electric scooter alerting sounds using psychoacoustical metrics. Applied Acoustics, 201(109136), https://doi.org/10.1016/j.apacoust.2022.109136

In recent years electric micromobility transportation, including electric scooters, has seen a surge in popularity due to technological advances and the move to lower emission transport. Although offering a range of societal benefits, such as reduced... Read More about Development of electric scooter alerting sounds using psychoacoustical metrics.

Aeroacoustic design and optimisation of an all-electric ducted fan propulsion module for low-noise impact (2022)
Presentation / Conference
Casagrande Hirono, F., Torija Martinez, A., Elliott, A., Taylor, J., Grimshaw, S., & Lefas, D. (2022, June). Aeroacoustic design and optimisation of an all-electric ducted fan propulsion module for low-noise impact. Presented at 28th AIAA/CEAS Aeroacoustics 2022 Conference, Southampton, UK

This paper discusses the aeroacoustic aspects of the design, construction and testing of an all-electric ducted fan propulsion module for future electric aircraft. An overview of the propulsor aerodynamic design is provided. Acoustic measurements mad... Read More about Aeroacoustic design and optimisation of an all-electric ducted fan propulsion module for low-noise impact.

Acoustic optimization of a contra-rotating propeller rig (2022)
Journal Article
Casagrande Hirono, F., Torija Martinez, A., & Elliott, A. (2022). Acoustic optimization of a contra-rotating propeller rig. https://doi.org/10.1121/10.0010735

With the advance of unmanned aerial vehicles as a viable alternative for urban transportation, it is imperative that these vehicles have a low impact on community noise. Contra-rotating propeller technologies offer interesting advantages over traditi... Read More about Acoustic optimization of a contra-rotating propeller rig.

Generation and analysis of artificial warning sounds for electric scooters (2021)
Report
Torija Martinez, A., Elliott, A., Harris, L., Podwinska, Z., Welham, C., Nicholls, R., …Williams, D. Generation and analysis of artificial warning sounds for electric scooters

• emTransit B.V (Dott) is a European mobility operator currently operating over 30,000 electric scooters in Belgium, France, Germany, Italy, Poland and now the UK. The company aims to expand its UK operations and has recently won a tender for the Tra... Read More about Generation and analysis of artificial warning sounds for electric scooters.

Fast transfer path analysis using controlled electric motors as in-situ blocked force vibration sources (2021)
Thesis
Wienen, K. (2021). Fast transfer path analysis using controlled electric motors as in-situ blocked force vibration sources. (Thesis). University of Salford

Under certain driving and road conditions, steering manoeuvres may provoke audible noise inside the vehicle compartment induced by the electric power steering (EPS) system. Regarding noise, vibration and harshness (NVH), engineers require practical t... Read More about Fast transfer path analysis using controlled electric motors as in-situ blocked force vibration sources.

Vibro-acoustic analysis of a domestic product based on experimental measurement and hybrid modelling (2021)
Journal Article
Meggitt, J., Banwell, G., Elliott, A., Moorhouse, A., & Langley, R. (2021). Vibro-acoustic analysis of a domestic product based on experimental measurement and hybrid modelling. Applied Acoustics, 182, 108144. https://doi.org/10.1016/j.apacoust.2021.108144

The purpose of this paper is to present a case study whereby a hybrid experimental-numerical model is used to analyse the structureborne radiation from a domestic product (vacuum cleaner head). The passive (including radiative) properties of the str... Read More about Vibro-acoustic analysis of a domestic product based on experimental measurement and hybrid modelling.

Component replacement TPA : a transmissibility-based structural modification method for in-situ transfer path analysis (2021)
Journal Article
Meggitt, J., Elliott, A., Moorhouse, A., Jalibert, A., & Franks, G. (2021). Component replacement TPA : a transmissibility-based structural modification method for in-situ transfer path analysis. Journal of Sound and Vibration, 499, 115991. https://doi.org/10.1016/j.jsv.2021.115991

In-situ Transfer Path Analysis is a diagnostic method used to analyse the propagation of noise and vibration through complex built-up structures. Its defining feature is the invariant characterisation of an assembly’s active components (i.e. vibrat... Read More about Component replacement TPA : a transmissibility-based structural modification method for in-situ transfer path analysis.

An experimental exploration of the properties of random frequency response functions (2020)
Journal Article
Clot, A., Meggitt, J., Langley, R., Elliott, A., & Moorhouse, A. (2021). An experimental exploration of the properties of random frequency response functions. Journal of Sound and Vibration, 491, 115773. https://doi.org/10.1016/j.jsv.2020.115773

The vibro-acoustic analysis of complex structures over a broadband frequency range is an extremely challenging problem that may often require the use of a hybrid deterministic-statistical approach. Due to manufacturing imperfections, the frequency re... Read More about An experimental exploration of the properties of random frequency response functions.

Evaluation of uncertainties in classical and component (blocked force) transfer path analysis (TPA) (2019)
Journal Article
Moorhouse, A., Meggitt, J., & Elliott, A. (2019). Evaluation of uncertainties in classical and component (blocked force) transfer path analysis (TPA). SAE Technical Papers, 1(4), 1779-1789. https://doi.org/10.4271/2019-01-1544

Transfer path analysis (TPA) has become a widely used diagnostic technique in the automotive and other sectors. In classic TPA, a two-stage measurement is conducted including operational and frequency response function (FRF) phases from which the con... Read More about Evaluation of uncertainties in classical and component (blocked force) transfer path analysis (TPA).

Development of a hybrid FE-SEA-experimental model (2019)
Journal Article
Clot, A., Meggitt, J., Langley, R., Elliott, A., & Moorhouse, A. (2019). Development of a hybrid FE-SEA-experimental model. Journal of Sound and Vibration, 452(Jul 19), 112-131. https://doi.org/10.1016/j.jsv.2019.03.027

The vibro-acoustic response of complex structures with uncertain properties is a problem of great concern for modern industries. In recent years, much research has been devoted to the prediction of this response in the mid-frequency range where, beca... Read More about Development of a hybrid FE-SEA-experimental model.

A covariance based framework for the propagation of uncertainty through inverse problems with an application to force identification (2019)
Journal Article
Meggitt, J., Moorhouse, A., & Elliott, A. (2019). A covariance based framework for the propagation of uncertainty through inverse problems with an application to force identification. Mechanical Systems and Signal Processing, 124, 275-297. https://doi.org/10.1016/j.ymssp.2018.11.038

Inverse problems are widely encountered in fields as diverse as physics, geophysics, engineering and finance. In the present paper, a covariance based framework for the estimation of their uncertainty is presented and applied to the problem of inve... Read More about A covariance based framework for the propagation of uncertainty through inverse problems with an application to force identification.

Measurement of in-room impact noise reduction (2018)
Journal Article
Elliott, A. (2018). Measurement of in-room impact noise reduction. Applied Acoustics, 148(May 19), 97-118. https://doi.org/10.1016/j.apacoust.2018.12.020

There are well-established measurement standards for the rating of impact noise reduction provided by floor coverings in relation to structurally transmitted impact noise, e.g. BS EN ISO 10140-3 and ASTM E492 are widely used in Europe and North Ameri... Read More about Measurement of in-room impact noise reduction.

Broadband characterisation of in-duct acoustic sources using an equivalent source approach (2018)
Journal Article
Meggitt, J., Elliott, A., Moorhouse, A., Banwell, G., Hopper, H., & Lamb, J. (2019). Broadband characterisation of in-duct acoustic sources using an equivalent source approach. Journal of Sound and Vibration, 442(Mar 19), 800-816. https://doi.org/10.1016/j.jsv.2018.10.041

This paper is concerned with the development of an experimental method capable of independently characterising low Mach number, in-duct fluid machines, such as pumps, fans, etc. The aim is to propose and test a source characterisation method that is... Read More about Broadband characterisation of in-duct acoustic sources using an equivalent source approach.

Vibro-electric transfer path analysis of a solid body electric guitar (2018)
Presentation / Conference
Elliott, A., Magill, J., & Kendrick, P. (2018, April). Vibro-electric transfer path analysis of a solid body electric guitar. Presented at Acoustics 2018, Cardiff, Wales

Solid bodied electric guitars typically employ one or more magnetic pickups attached to the guitar body in close proximity to the guitar strings. At low frequencies the amplitude of the vibrating string is typically far greater than vibrations transm... Read More about Vibro-electric transfer path analysis of a solid body electric guitar.

In situ determination of dynamic stiffness for resilient elements (2015)
Journal Article
Meggitt, J., Elliott, A., Moorhouse, A., & Lai, K. (2016). In situ determination of dynamic stiffness for resilient elements. Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, 230(6), 986-993. https://doi.org/10.1177/0954406215618986

An in situ method for the measurement of a resilient lements dynamic transfer stiffness is outlined and alidated. Unlike current methods, the proposed in situ approach allows for the characterisation of a resilient element whilst incorporated into an... Read More about In situ determination of dynamic stiffness for resilient elements.

Blocked forces for the characterisation of structure borne noise (2015)
Presentation / Conference
Elliott, A., Meggitt, J., & Moorhouse, A. (2015, August). Blocked forces for the characterisation of structure borne noise. Presented at Internoise 2015, San Francisco

During the development of complex assemblies such as aircraft the noise from installed components must be considered. For airborne sound sources this issue has been resolved to some extent by standard measurement procedures which allow equipment supp... Read More about Blocked forces for the characterisation of structure borne noise.

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.