All Outputs (84)

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.

Investigation of metrics for assessing human response to drone noise (2022)
Journal Article
Torija Martinez, A., & Nicholls, R. (2022). Investigation of metrics for assessing human response to drone noise. International Journal of Environmental Research and Public Health, 19(6), 3152. https://doi.org/10.3390/ijerph19063152

Novel electric air transportation is emerging as an industry that could help to improve the lives of people living in both metropolitan and rural areas through integration into infrastructure and services. However, as this new resource of accessibili... Read More about Investigation of metrics for assessing human response to drone noise.

Study on fair and equitable distribution of aircraft at Gatwick (2022)
Report
Torija Martinez, A., Clark, C., Lavia, L., Manuel, G., & Lomax, C. Study on fair and equitable distribution of aircraft at Gatwick

Fair and Equitable Dispersion (FED) was introduced in 2015 as an aspirational objective among others, by communities affected by noise from aircraft using London’s Gatwick Airport. The airport’s Noise Management Board (NMB) was established as a resul... Read More about Study on fair and equitable distribution of aircraft at Gatwick.

Psychoacoustic modelling of rotor noise (2022)
Journal Article
Torija, A. J., Li, Z., & Chaitanya, P. (2022). Psychoacoustic modelling of rotor noise. ˜The œJournal of the Acoustical Society of America (Online), 151(3), 1804-1815. https://doi.org/10.1121/10.0009801

The aviation sector is rapidly evolving with more electric propulsion systems and a variety of new technologies of vertical take-off and landing manned and unmanned aerial vehicles. Community noise impact is one of the main barriers for the wider ado... Read More about Psychoacoustic modelling of rotor noise.

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.

Towards predicting noise-power-distance curves for propeller and rotor powered aircraft (2021)
Journal Article
rotor powered aircraft. NOISE-CON proceedings, 3909-3920. https://doi.org/10.3397/IN-2021-2555

Propeller and rotor based propulsion systems are the predominant choice of power delivery system in the upcoming Urban Air Mobility market. Fully electric air-taxis (car sized vehicles with Vertical Take-off and Landing, VTOL, capabilities) concepts... Read More about Towards predicting noise-power-distance curves for propeller and rotor powered aircraft.

An investigation into human response to unmanned aerial vehicle noise (2021)
Journal Article
noise. NOISE-CON proceedings, 577-588. https://doi.org/10.3397/IN-2021-1570

It is predicted that urban air mobility, including the use of small to medium sized unmanned aerial vehicle (UAV) delivery systems, will be introduced into cities across the globe within the next 15 years. It is known, however, that noise is one of t... Read More about An investigation into human response to unmanned aerial vehicle noise.

Psychoacoustic analysis of contra-rotating propeller noise for unmanned aerial vehicles (2021)
Journal Article
Torija Martinez, A. J., Paruchuri, C., & Zhengguang, L. (2021). Psychoacoustic analysis of contra-rotating propeller noise for unmanned aerial vehicles. ˜The œJournal of the Acoustical Society of America (Online), 149(2), 835-846. https://doi.org/10.1121/10.0003432

Unmanned aerial vehicle (UAV) technologies are rapidly advancing due to the unlimited number of applications from parcel delivery to people transportation. As the UAV market expands, community noise impact will become a significant problem for public... Read More about Psychoacoustic analysis of contra-rotating propeller noise for unmanned aerial vehicles.

A psychoacoustic approach to building knowledge about human response to noise of Unmanned Aerial Vehicles (2021)
Journal Article
Torija Martinez, A., & Clark, C. (2021). A psychoacoustic approach to building knowledge about human response to noise of Unmanned Aerial Vehicles. International Journal of Environmental Research and Public Health, 18(2), 682. https://doi.org/10.3390/ijerph18020682

We are on the cusp of a revolution in the aviation sector, driven by the significant progress on electric power and battery technologies, and autonomous systems. Several industry leaders and governmental agencies are currently investigating the use o... Read More about A psychoacoustic approach to building knowledge about human response to noise of Unmanned Aerial Vehicles.

Effects of a hovering Unmanned Aerial Vehicle on urban soundscapes perception (2019)
Journal Article
Torija Martinez, A., Zhengguang, L., & Self, R. (2020). Effects of a hovering Unmanned Aerial Vehicle on urban soundscapes perception. Transportation Research Part D: Transport and Environment, 78, 102195. https://doi.org/10.1016/j.trd.2019.11.024

Several industry leaders and governmental agencies are currently investigating the use of Unmanned Aerial Vehicles (UAVs), or ‘drones’ as commonly known, for an ever-growing number of applications from blue light services to parcel delivery. For the... Read More about Effects of a hovering Unmanned Aerial Vehicle on urban soundscapes perception.

Influence of sound reflection on aircraft directivity and lateral attenuation on the ground (2019)
Presentation / Conference
lateral attenuation on the ground. Presented at Internoise 2019, Noise Control for a Better Environment, Madrid, Spain

The calculation of the lateral attenuation correction for computing aircraft noise footprints on the ground, as proposed by Doc29 and AIR5662, is based on semiempirical methods not suitable for accounting for the particular characteristics of some... Read More about Influence of sound reflection on aircraft directivity and lateral attenuation on the ground.

Psychoacoustic Characterisation of a Small Fixed-pitch Quadcopter (2019)
Presentation / Conference
Torija Martinez, A., Self, R., & Lawrence, J. (2019, June). Psychoacoustic Characterisation of a Small Fixed-pitch Quadcopter. Presented at Internoise 2019, Noise Control for a Better Environment, Madrid, Spain

In this study, a series of acoustic measurements were taken on a small fixed-pitch quadcopter, both in a controlled indoor acoustic environment and while flying outdoors. At controlled indoor conditions, audio signatures were recorded with the quadco... Read More about Psychoacoustic Characterisation of a Small Fixed-pitch Quadcopter.

Technological, economic and environmental prospects of all-electric aircraft (2018)
Journal Article
Schafer, A., Barrett, S., Doyme, K., Dray, L., Gnadt, A., Self, R., …Torija Martinez, A. (2019). Technological, economic and environmental prospects of all-electric aircraft. Nature Energy, 4(2), 160-166. https://doi.org/10.1038/s41560-018-0294-x

Ever since the Wright brothers’ first powered flight in 1903, commercial aircraft have relied on liquid hydrocarbon fuels. However, the need for greenhouse gas emission reductions along with recent progress in battery technology for automobiles has... Read More about Technological, economic and environmental prospects of all-electric aircraft.

On the assessment of subjective response to tonal content of contemporary aircraft noise (2018)
Journal Article
Torija Martinez, A., Roberts, S., Woodward, R., Flindell, I., McKenzie, A., & Self, R. (2019). On the assessment of subjective response to tonal content of contemporary aircraft noise. Applied Acoustics, 146, 190-203. https://doi.org/10.1016/j.apacoust.2018.11.015

The Effective Perceived Noise Level (EPNL) is the primary metric used for assessing subjective response to aircraft noise. The EPNL comprises calculation of the Perceived Noise Level (in PNdB), and takes into account flyover duration and the presen... Read More about On the assessment of subjective response to tonal content of contemporary aircraft noise.

Representative-in-class vehicles for fleet-level aviation noise analysis (2018)
Presentation / Conference
Torija Martinez, A., & Self, R. (2018, July). Representative-in-class vehicles for fleet-level aviation noise analysis. Presented at 25th International Congress on Sound and Vibration 2018, ICSV 2018: Hiroshima Calling, Hiroshima, Japan

Global air traffic demand is projected to nearly double by 2035 (7.2 billion passengers) compared to the 3.8 billion passengers in 2016. At such a growth rate, the aviation sector might cause an important detriment of the welfare of those living arou... Read More about Representative-in-class vehicles for fleet-level aviation noise analysis.

Preliminary noise assessment of aircraft with distributed electric propulsion (2018)
Presentation / Conference
Synodinos, A., Self, R., & Torija Martinez, A. (2018, June). Preliminary noise assessment of aircraft with distributed electric propulsion. Presented at 2018 AIAA/CEAS Aeroacoustics Conference, Atlanta, Georgia

Electric and hybrid-electric propulsion technologies in aviation are becoming more attractive for aviation stakeholders not only due to the resulting reduction or elimination of the dependency on oil, whose availability and price are uncertain, but... Read More about Preliminary noise assessment of aircraft with distributed electric propulsion.

Aircraft classification for efficient modelling of environmental noise impact of aviation (2018)
Journal Article
Torija Martinez, A., & Self, R. (2018). Aircraft classification for efficient modelling of environmental noise impact of aviation. Journal of Air Transport Management, 67, 157-168. https://doi.org/10.1016/j.jairtraman.2017.12.007

With the environmental externalities of civil aviation under unprecedented scrutiny, and with the projected significant increase in air traffic demand over the next few decades, fleet-level studies are required to assess the potential benefit of no... Read More about Aircraft classification for efficient modelling of environmental noise impact of aviation.

Airport noise modelling for strategic environmental impact assessment of aviation (2017)
Journal Article
Torija Martinez, A., Self, R., & Flindell, I. (2018). Airport noise modelling for strategic environmental impact assessment of aviation. Applied Acoustics, 132, 49-57. https://doi.org/10.1016/j.apacoust.2017.10.017

As projected by different agencies the aviation market will experience a significant increase in air traffic demand over the next decades, driven by the large demand of the Asia-Pacific region. To overcome the further deterioration of the quality o... Read More about Airport noise modelling for strategic environmental impact assessment of aviation.

Framework for predicting noise-power-distance curves for novel aircraft designs (2017)
Journal Article
Synodinos, A., Self, R., & Torija Martinez, A. (2018). Framework for predicting noise-power-distance curves for novel aircraft designs. Journal of Aircraft, 55(2), 781-791. https://doi.org/10.2514/1.C034466

Along with flight profiles, noise–power–distance curves are the key input variable for computing noise exposure contour maps around airports. With the development of novel aircraft designs (incorporating noise-reduction technologies) and new noise-... Read More about Framework for predicting noise-power-distance curves for novel aircraft designs.

Soundscape assessment of a monumental place : a methodology based on the perception of dominant sounds (2017)
Journal Article
Perez-Martinez, G., Torija Martinez, A., & Ruiz, D. (2018). Soundscape assessment of a monumental place : a methodology based on the perception of dominant sounds. Landscape and Urban Planning, 169, 12-21. https://doi.org/10.1016/j.landurbplan.2017.07.022

Some monumental sites have unique soundscapes that deserve to be managed not only by their tourist and cultural value, but also for enhancing the visitors’ overall impression. These sites can include a multitude of sound sources within a variety of... Read More about Soundscape assessment of a monumental place : a methodology based on the perception of dominant sounds.