All Outputs (20)

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.

Generation of noise exposure contours for eVTOL aircraft including transition (2022)
Presentation / Conference
Amargianitakis, D., Self, R., Proenca, A., Torija Martinez, A., & Synodinos, A. (2022, June). Generation of noise exposure contours for eVTOL aircraft including transition. Presented at 28th AIAA/CEAS Aeroacoustics 2022 Conference, Southampton, UK

With the advent of the Urban Air Mobility (UAM) sector, a wide variety of concepts have emerged in academic studies and industry preliminary designs. The majority of these concepts sport Vertical Takeoff and Landing (VTOL) capabilities taking advanta... Read More about Generation of noise exposure contours for eVTOL aircraft including transition.

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.

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.

Noise assessment of aircraft with distributed electric propulsion using a new noise estimation framework (2017)
Presentation / Conference
Synodinos, A., Self, R., & Torija Martinez, A. (2017, July). Noise assessment of aircraft with distributed electric propulsion using a new noise estimation framework. Presented at 24th International Congress on Sound and Vibration, ICSV 2017, London, UK

Future aircraft are envisioned to have significantly smaller noise footprint and emissions impact in order to satisfy the ambitious long-term aircraft noise and emissions goals set by several organisations worldwide, for example ACARE and NASA. Dis... Read More about Noise assessment of aircraft with distributed electric propulsion using a new noise estimation framework.

On the CO2 and noise emissions forecast in future aviation scenarios in the UK (2016)
Presentation / Conference
Torija Martinez, A., Self, R., & Flindell, I. (2016, August). On the CO2 and noise emissions forecast in future aviation scenarios in the UK. Presented at INTER-NOISE 2016 - 45th International Congress and Exposition on Noise Control Engineering: Towards a Quieter Future, Hamburg, Germany

Aircraft operations have a significant impact on local air quality, climate change, fuel consumption and noise around airports. In order to reach emission targets set by aviation agencies (e.g. ACARE), to reduce environmental impact and to ensure a s... Read More about On the CO2 and noise emissions forecast in future aviation scenarios in the UK.

Evolution of noise metrics in future aviation scenarios in the UK (2016)
Presentation / Conference
Torija Martinez, A., Self, R., & Flindell, I. (2016, July). Evolution of noise metrics in future aviation scenarios in the UK. Presented at ICSV 2016 - 23rd International Congress on Sound and Vibration: From Ancient to Modern Acoustics 2016, Athens, Greece

The Department for Transport of the UK (DfT) estimates an increase of 90% of air transport movements by 2050 compared to 2010. In order to offset such increase in the number of aircraft operations and avoid the consequent increase in noise impact on... Read More about Evolution of noise metrics in future aviation scenarios in the UK.

A new method for estimating community noise changes due to aircraft technology variations (2016)
Presentation / Conference
Synodinos, A., Self, R., Torija Martinez, A., & Flindell, I. (2016, July). A new method for estimating community noise changes due to aircraft technology variations. Presented at ICSV 2016 - 23rd International Congress on Sound and Vibration: From Ancient to Modern Acoustics 2016, Athens, Greece

Future air traffic growth forecasts underline the need for new environmental abatement strategies for aviation, involving, among others, the adoption of new aircraft designs and technologies. Accurately predicting the noise impact of these strategi... Read More about A new method for estimating community noise changes due to aircraft technology variations.

Estimating variation in community noise due to variation in aircraft operations (2015)
Presentation / Conference
Synodinos, A., Self, R., Flindell, I., & Torija Martinez, A. (2015, May). Estimating variation in community noise due to variation in aircraft operations. Presented at 10th European Congress and Exposition on Noise Control Engineering (EuroNoise2015), Maastricht, Holland

Notwithstanding considerable effort by many researchers world-wide, the estimation of community noise due to changes in aircraft fleets and operations remains subject to considerable uncertainty. This paper describes a new taxonomical architecture... Read More about Estimating variation in community noise due to variation in aircraft operations.

Frequency weightings based on subjectively dominant spectral ranges (2015)
Presentation / Conference
Torija Martinez, A., Flindell, I., Self, R., & Torija Martinez, A. J. (2015, May). Frequency weightings based on subjectively dominant spectral ranges. Presented at 10th European Congress and Exposition on Noise Control Engineering (EuroNoise2015), Maastricht, Holland

The optimisation of frequency weightings for the assessment of environmental and transportation noise has been an enduring research theme, with no real consensus achieved, other than increasing acknowledgement that the widespread adoption of the A-... Read More about Frequency weightings based on subjectively dominant spectral ranges.

Exploratory analysis of the factors involved in the perception of the quality of urban soundscapes (2014)
Presentation / Conference
Garcia-Checa, F., Perez-Martinez, G., Torija Martinez, A., & Ruiz, D. (2014, September). Exploratory analysis of the factors involved in the perception of the quality of urban soundscapes. Presented at 7th Forum Acusticum, FA 2014, Krakow, Poland

The identity of urban environments are largely determined by their history and current use, which should be closely related. Moreover, the particular sound of a specific urban site should be a distinct component of its image and identity, thanks to w... Read More about Exploratory analysis of the factors involved in the perception of the quality of urban soundscapes.

Analysis of the suitability of using the A-weighting filter for evaluating road traffic exposure (2014)
Presentation / Conference
Torija Martinez, A., Flindell, I., & Ruiz, D. (2014, September). Analysis of the suitability of using the A-weighting filter for evaluating road traffic exposure. Presented at 7th Forum Acusticum, FA 2014, Krakow, Poland

A-weighted sound pressure level is the most widely used descriptor for evaluating noise annoyance. However, strong criticism is associated with the dB(A) scale because it overcompensates for the hearing system’s reduced sensi... Read More about Analysis of the suitability of using the A-weighting filter for evaluating road traffic exposure.

ANN-based model to identify noticed sound events. A tool for inclusion in action plans against environmental noise in urban environments (2011)
Presentation / Conference
Torija Martinez, A., Ruiz, D., & Ramos-Ridao, A. (2011, June). ANN-based model to identify noticed sound events. A tool for inclusion in action plans against environmental noise in urban environments. Presented at 6th Forum Acusticum, organized by the European Acoustics Association (EAA), Aalborg, Denmark

Over recent years, acoustic pollution has become a common problem for urban environments and its treatment one of the new challenges in environmental policy. In this framework, the enactment of the European Directive on Environmental Noise Management... Read More about ANN-based model to identify noticed sound events. A tool for inclusion in action plans against environmental noise in urban environments.

Modeling environmental noise using artificial neural networks (2009)
Presentation / Conference
Genaro, N., Torija Martinez, A., Ramos, A., Requena, I., Ruiz, D., & Zamorano, M. (2009, November). Modeling environmental noise using artificial neural networks. Presented at 2009 Ninth International Conference on Intelligent Systems Design and Applications, Pisa, Italy

Since 1972, when the World Health Organization (WHO) classified noise as a pollutant, most industrialized countries have enacted laws or local regulations that regulate noise levels. Many scientists have tried to model urban noise, but the result... Read More about Modeling environmental noise using artificial neural networks.

Model to predict the level and the temporal and spectral composition of the sound pressure in urban soundscapes based on neural networks (2009)
Presentation / Conference
Torija Martinez, A., Ruiz, D., & Ramos-Ridao, A. (2009, October). Model to predict the level and the temporal and spectral composition of the sound pressure in urban soundscapes based on neural networks. Presented at Euronoise 2009, Edinburgh, U.K

Environmental noise is a factor with a significant impact on personal well-being. One of the principal challenges of urban planning is the creation of soundscapes capable of providing inhabitants with a high quality of life. In the framework of the... Read More about Model to predict the level and the temporal and spectral composition of the sound pressure in urban soundscapes based on neural networks.

Closed-form analytical approach for calculating noise contours of directive aircraft noise sources
Presentation / Conference
Amargianitakis, D., Self, R., Torija Martinez, A., Proenca, A., & Synodinos, A. Closed-form analytical approach for calculating noise contours of directive aircraft noise sources. Presented at AIAA Aviation 2021 Forum, Virtual Event

This paper comes as an update to the simplified airport noise model RANE (Rapid Aviation Noise Evaluator) adding capability of including fully non-isotropic noise sources. RANE v2 is developed as a part of multidisciplinary acoustic assessment of nov... Read More about Closed-form analytical approach for calculating noise contours of directive aircraft noise sources.

Drone noise, a new public health challenge?
Presentation / Conference
Torija Martinez, A. Drone noise, a new public health challenge?. Presented at Quiet Drones International e-Symposium on UAV/UAS Noise, Remote from Paris (France)

There is a rapidly growing interest in manned and unmanned aerial vehicles of different size from small multi-rotor drones to Urban Air Mobility (UAM) vehicles. With the projected expansion of the sector, for a variety of applications from parcel del... Read More about Drone noise, a new public health challenge?.

Metrics for assessing the perception of drone noise
Presentation / Conference
Torija Martinez, A., & Li, Z. Metrics for assessing the perception of drone noise. Presented at e-Forum Acusticum 2020, Online

Unmanned Aerial Vehicle (UAV) technology is rapidly advancing, and therefore, the potential for UAV use seems almost unlimited at this stage. Diverse UAV stakeholders are currently exploring the feasibility of different UAV applications for monit... Read More about Metrics for assessing the perception of drone noise.