Prof Antonio Torija Martinez's Outputs (20)

How do flight operations and ambient acoustic environments influence noticeability and noise annoyance associated with unmanned aircraft systems? (2024)
Presentation / Conference Contribution

In advance of anticipated wider deployments of advanced air mobility technology, the potential effects of introducing new sound sources such as unmanned aircraft systems (UAS, aka ‘drones’) on communities are largely unknown. To support the developme... Read More about How do flight operations and ambient acoustic environments influence noticeability and noise annoyance associated with unmanned aircraft systems?.

Towards a Taxonomy for the Assessment of the Unmanned Aerial Systems Noise Emissions (2024)
Presentation / Conference Contribution

Despite the many advantages of unconventional aerial systems, mainly for logistics and transportation applications, noise has emerged as one of the main public acceptance factors that can delay the start of commercial operations of Advanced Air Mobil... Read More about Towards a Taxonomy for the Assessment of the Unmanned Aerial Systems Noise Emissions.

Soundwalking in Salford: A Soundscape Approach to Drone Noise Assessment (2024)
Presentation / Conference Contribution

This paper introduces the method of controlled addition of drone sound sources to an existing acoustic scene in order to assess their impact using the soundwalking technique. A set of soundwalks were conducted at The Meadow, Salford to assess the per... Read More about Soundwalking in Salford: A Soundscape Approach to Drone Noise Assessment.

Comparing the Human Response of Unmanned Aircraft System Noise and Other Transportation Noise (2024)
Presentation / Conference Contribution

An experiment was designed to investigate the perception of noise from different Unmanned Aircraft System (UAS) alongside three other vehicle types, including road traffic, conven tional aircraft, and helicopters. The aim of this experiment was to un... Read More about Comparing the Human Response of Unmanned Aircraft System Noise and Other Transportation Noise.

An acoustic and psychoacoustic assessment on the noise control of propellers in distributed propulsion configuration using phase-synchronisation Session: Experimental Techniques (2024)
Presentation / Conference Contribution

Distributed electric propulsion is widely recoginised as a promising propulsion configuration for next-generation aerial vehicles, including short-to-medium-haul passenger aircraft and urban air mobility vehicles. The presence of multiple propulsors... Read More about An acoustic and psychoacoustic assessment on the noise control of propellers in distributed propulsion configuration using phase-synchronisation Session: Experimental Techniques.

A deep learning approach to predicting UAV sound affect (2024)
Presentation / Conference Contribution

The most prevalent method by which the impact of an acoustic environment upon people is assessed is the `environmental noise' approach, in which the sounds are quantified based entirely on their recorded weighted sound pressure levels. This does not... Read More about A deep learning approach to predicting UAV sound affect.

Understanding human responses to air source heat pump noise: examining tonal changes and operating cycles (2024)
Presentation / Conference Contribution

Air Source Heat Pumps are pivotal in the Government of the United Kingdom's target of achieving net zero carbon emissions by 2050. However, their widespread adoption faces challenges, with noise being among the main barriers to entry and a restrictin... Read More about Understanding human responses to air source heat pump noise: examining tonal changes and operating cycles.

Higher-fidelity analysis of air source heat pump noise via scanning intensity measurement (2024)
Presentation / Conference Contribution

The need to shift to reduce carbon emissions to hit Net Zero is currently driving plans for large scale rollouts of Air Source Heat Pumps (ASHPs), due to their increased thermal efficiency and lack of direct carbon emissions. Concern exists, however,... Read More about Higher-fidelity analysis of air source heat pump noise via scanning intensity measurement.

Comparison of the noise perception of conventional aircraft and Unmanned Aircraft Systems (2024)
Presentation / Conference Contribution

The use of Unmanned Aircraft Systems (UAS) for commercial applications is seeing steady growth in numerous sectors as the technology improves and more applications are realised. Whilst research into human response to UAS noise is a relatively new fie... Read More about Comparison of the noise perception of conventional aircraft and Unmanned Aircraft Systems.

Aerodynamic and aeroacoustic design of electric ducted fans (2024)
Journal Article

This paper describes the aerodynamic and aeroacoustic design of an electric ducted fan (EDF). A prototype EDF was designed and built with three different rotor-stator sets to operate at design flow coefficients... Read More about Aerodynamic and aeroacoustic design of electric ducted fans.

Synthesis and Auralisations of Quadcopter Flyovers for Psychoacoustic Assessment. (2024)
Presentation / Conference Contribution

This paper describes a methodology to generate auralisations of quadcopter flyovers from recordings of hovering operations. The primary focus of this investigation is reproducing changes in the tonal components at the blade passing frequencies and th... Read More about Synthesis and Auralisations of Quadcopter Flyovers for Psychoacoustic Assessment..

Boundary Layer Ingestion Ducted Fan: Aeroacoustic and Psychoacoustic Insights (2024)
Presentation / Conference Contribution

An in-depth experimental study was conducted to investigate the noise characteristics of a ducted fan ingesting an adverse pressure gradient turbulent boundary layer, typical of those encountered in novel airframe-integrated propulsion systems. To ga... Read More about Boundary Layer Ingestion Ducted Fan: Aeroacoustic and Psychoacoustic Insights.

Acoustic and Psychoacoustic Characterisation of Unmanned Aircraft Systems as a Function of Vehicle Mass and Flight Procedure (2024)
Presentation / Conference Contribution

Previous studies have found the noise emission of Unmanned Aircraft Systems (UAS) highly dependent on the vehicle mass and flight procedure. These changes in noise emission, as well as the position of the UAS relative to the receiver, have led to cha... Read More about Acoustic and Psychoacoustic Characterisation of Unmanned Aircraft Systems as a Function of Vehicle Mass and Flight Procedure.

Aerodynamics and Acoustics of Asymmetric Propellers With Uneven Blade Spacing (2024)
Presentation / Conference Contribution

The presented work aims to establish whether asymmetric propellers with uneven blade spacing offer any acoustic benefits over a conventional propeller with identical blade geometry. An experimental investigation was conducted to measure static thrust... Read More about Aerodynamics and Acoustics of Asymmetric Propellers With Uneven Blade Spacing.

Correction: Noise from Unconventional Aircraft: A Review of Current Measurement Techniques, Psychoacoustics, Metrics and Regulation (2024)
Journal Article
J. B. Lotinga, M., Ramos-Romero, C., Green, N., & J. Torija, A. (2024). Correction: Noise from Unconventional Aircraft: A Review of Current Measurement Techniques, Psychoacoustics, Metrics and Regulation. Current Pollution Reports, https://doi.org/10.1007/s40726-024-00311-z

Perception of noise from unmanned aircraft systems: Efficacy of metrics for indoor and outdoor listener positions (2024)
Journal Article
Green, N., Torija, A. J., & Ramos-Romero, C. (2024). Perception of noise from unmanned aircraft systems: Efficacy of metrics for indoor and outdoor listener positions. ˜The œJournal of the Acoustical Society of America (Online), 155(2), 915-929. https://doi.org/10.1121/10.0024522

This paper presents the results of a listening experiment designed to assess annoyance and perceived loudness (PL) for several unmanned aircraft system (UAS) operations, with the listener simulated in indoor and outdoor positions. This research inves... Read More about Perception of noise from unmanned aircraft systems: Efficacy of metrics for indoor and outdoor listener positions.

Investigating the Dose Response of UAS Noise: Designing a Listening Experiment (2024)
Presentation / Conference Contribution

In collaboration with the UK Civil Aviation Authority, the University of Salford is carrying out research to better understand the human perception and dose response of Unmaned Aerial Systems (UAS) noise. A listening experiment has been conducted to... Read More about Investigating the Dose Response of UAS Noise: Designing a Listening Experiment.

sUAS noise characterisation during hovering operations (2024)
Presentation / Conference Contribution

In the framework of the EPSRC - UK DroneNoise project, a multi-channel methodology for small unmanned aerial systems (sUAS) noise measurement was applied under controlled conditions. The measurement campaign was carried out during August 2022 in Edze... Read More about sUAS noise characterisation during hovering operations.

Audio Stimuli (2024)
Digital Artefact
Green, N., Martinez, A. J. T., & Romero, C. R. (2024). Audio Stimuli. [Audio]

Drone / UAS Noise stimuli used for Listening Experiment

Developing a noise and soundscape conceptual framework for fair and equitable distribution of aircraft (2024)
Presentation / Conference Contribution

Fair and Equitable Distribution (FED) of aircraft, was introduced in 2015 as an aspirational objective by communities affected by aircraft noise from Gatwick Airport, the third-busiest airport by total passenger traffic in the UK. This paper present... Read More about Developing a noise and soundscape conceptual framework for fair and equitable distribution of aircraft.