Prof Trevor Cox's Outputs (145)

Extracting room reverberation time from speech using artificial neural networks (2001)
Journal Article
Cox, T., Li, F., & Darlington, P. (2001). Extracting room reverberation time from speech using artificial neural networks. Journal of the Audio Engineering Society, 49(4), 219-230

A novel method to extract the reverberation time from reverberated speech utterances is presented. In this study, speech utterances are restricted to pronounced digits; uncontrolled discourse is not considered. The reverberation times considered are... Read More about Extracting room reverberation time from speech using artificial neural networks.

Hearing loss in the built environment : the experience of elderly people (2001)
Journal Article
Davies, W., Cox, T., Kearon, A., Longhurst, B., & Webb, C. (2001). Hearing loss in the built environment : the experience of elderly people. Acta acustica united with Acustica, 87(5), 610-616

A qualitative social survey has been conducted on a group of 207 elderly people with a hearing loss. The aim of the study was to determine the extent to which acoustic problems in the built environment affect this subject group. The project was thoug... Read More about Hearing loss in the built environment : the experience of elderly people.

Response to "comment on 'reducing seat dip attenuation'" J. Acoust. Soc. Am. 110, 1260 (2001) (2001)
Journal Article
Davies, W., & Cox, T. (2001). Response to "comment on 'reducing seat dip attenuation'" J. Acoust. Soc. Am. 110, 1260 (2001). ˜The œJournal of the Acoustical Society of America (Online), 110(3), 1261-1262

This letter responds to Klepper's comments [J. Acoust. Soc. Am. 110, 1260 (2001)] on the subject paper, which is concerned with ameliorating seat dip attenuation in auditoria by introducing a pit under the seats. Klepper asks what the effect of the p... Read More about Response to "comment on 'reducing seat dip attenuation'" J. Acoust. Soc. Am. 110, 1260 (2001).

From a profiled diffuser to an optimized absorber (2000)
Journal Article
Wu, T., Cox, T., & Lam, Y. (2000). From a profiled diffuser to an optimized absorber. ˜The œJournal of the Acoustical Society of America (Online), 108(2), 643-650. https://doi.org/10.1121/1.429596

The quadratic residue diffuser was originally designed for enhanced scattering. Subsequently, however, it has been found that these diffusers can also be designed to produce exceptional absorption. This paper looks into the absorption mechanism of th... Read More about From a profiled diffuser to an optimized absorber.

Surface diffusion coefficients for room acoustics : free-field measures (2000)
Journal Article
Hargreaves, T., Cox, T., Lam, Y., & D'Antonio, P. (2000). Surface diffusion coefficients for room acoustics : free-field measures. https://doi.org/10.1121/1.1310192

A surface diffusion coefficient is needed in room acoustics to enable the quality of diffusing surfaces to be evaluated. It may also facilitate more accurate geometric room acoustic models. This paper concentrates on diffusion coefficients derived fr... Read More about Surface diffusion coefficients for room acoustics : free-field measures.

Reducing seat dip attenuation (2000)
Journal Article
Davies, W., & Cox, T. (2000). Reducing seat dip attenuation. ˜The œJournal of the Acoustical Society of America (Online), 108(5), 2211-2218

Strategies fur reducing seat dip attenuation in concert halls are considered. It is shown that the dip is established 4 ms after the direct sound from the stage arrives at the listener. Sound scattered from the seats and floor is the main cause of th... Read More about Reducing seat dip attenuation.

Subjective perception of seat dip attenuation (1996)
Journal Article

An investigation has been conducted into the subjective perception of the seat dip effect (a low-frequency attenuation affecting sound travelling at grazing incidence over seating). In a realistic simulation of a concert hall sound field, the thresho... Read More about Subjective perception of seat dip attenuation.

The optimization of profiled diffusers (1995)
Journal Article
Cox, T. (1995). The optimization of profiled diffusers. ˜The œJournal of the Acoustical Society of America (Online), 97(5), 2928-2936. https://doi.org/10.1121/1.412972

Methods have been developed to produce profiled diffusers that create a large amount of diffusion. The methods are iterative and required the development of a new parameter to measure diffusion. Achieving scattering independent of angle has been atte... Read More about The optimization of profiled diffusers.

The sensitivity of listeners to early sound field changes in auditoriums (1993)
Journal Article
Cox, T., Davies, W., & Lam, Y. (1993). The sensitivity of listeners to early sound field changes in auditoriums. Acta acustica united with Acustica, 79(1), 27-41

The sensitivity of listeners to small changes in the early sound field of auditoria has been measured. This was done using a realistic artificial simulation system of a concert ball sound field. The simulation system was designed so that standard obj... Read More about The sensitivity of listeners to early sound field changes in auditoriums.

Objective and subjective evaluation of reflecting and diffusing surfaces in auditoria (1992)
Thesis
Cox, T. Objective and subjective evaluation of reflecting and diffusing surfaces in auditoria. (Thesis). University of Salford

The performance of reflectors and diffusers used in auditoria have been
evaluated both objectively and subjectively.
Two accurate systems have been developed to measure the scattering
from surfaces via the cross correlation function. These have be... Read More about Objective and subjective evaluation of reflecting and diffusing surfaces in auditoria.

Acoustic room modelling using a spherical camera for reverberant spatial audio objects
Presentation / Conference
Hansung, K., Hughes, R., Remaggi, L., Jackson, P., Hilton, A., Cox, T., & Shirley, B. Acoustic room modelling using a spherical camera for reverberant spatial audio objects. Poster presented at 142nd AES Convention, Berlin, Germany

The ability to predict the acoustics of a room without acoustical measurements is a useful capability. The motivation here stems from spatial audio reproduction, where knowledge of the acoustics of a space could allow for more accurate reproduction o... Read More about Acoustic room modelling using a spherical camera for reverberant spatial audio objects.

Continuous evaluative and pupil dilation response to soundscapes
Presentation / Conference
Graetzer, S., Landowska, A., Harris, L., Cox, T., & Davies, W. Continuous evaluative and pupil dilation response to soundscapes. Presented at e-Forum Acusticum 2020, Online

We investigated human response to soundscapes using a continuous second-by-second rating of soundscapes and a more conventional overall rating of each sample at the end of each audition. In this work, our primary aim was to explore what continuous ra... Read More about Continuous evaluative and pupil dilation response to soundscapes.

Automatic detection of microphone wind noise : maximising accuracy of amplitude modulation ratings
Presentation / Conference
von Hünerbein, S., Cox, T., Kendrick, P., & Bradley, S. Automatic detection of microphone wind noise : maximising accuracy of amplitude modulation ratings. Presented at Wind Turbine Sound 2016, Gdansk, Poland

Microphone wind noise can corrupt outdoor measurements and recordings. It is a particular problem for wind turbine measurements because these cannot be carried out when the wind speed is low. Wind shields can be used, but often the sound level from t... Read More about Automatic detection of microphone wind noise : maximising accuracy of amplitude modulation ratings.

Using blind signal processing algorithms to remove wind noise from environmental noise assessments : a wind turbine amplitude modulation case study
Journal Article
Kendrick, P., von Hünerbein, S., & Cox, T. Using blind signal processing algorithms to remove wind noise from environmental noise assessments : a wind turbine amplitude modulation case study. ˜The œJournal of the Acoustical Society of America (Online), 138(3), 1731-1732. https://doi.org/10.1121/1.4933451

Microphone
wind noise can corrupt outdoor measurements and recordings. It is a particular problem for wind turbine
measurements because these cannot be carried out when the wind speed is low. Wind shields can be used, but often the sound level from... Read More about Using blind signal processing algorithms to remove wind noise from environmental noise assessments : a wind turbine amplitude modulation case study.

Measuring a portable audio device’s response to excessive sound levels
Report
Kendrick, P., Cox, T., Fazenda, B., & Jackson, I. Measuring a portable audio device’s response to excessive sound levels

This is a report detailing how a series of measurements were carried out to quantify the non-linear performance of a series of portable audio recorders. The performance of a series of common devices is quantified including the; Cannon 550D, Edirol r... Read More about Measuring a portable audio device’s response to excessive sound levels.

Tutorial : public engagement through audio internet experiments
Report
Cox, T. (2011). Tutorial : public engagement through audio internet experiments

This tutorial paper details experiences of four public engagement projects that have communicated acoustic science to lay audiences using web experiments. Recent developments in personal computers, the Internet and software platforms offers new and e... Read More about Tutorial : public engagement through audio internet experiments.

Scraping sounds and disgusting noises
Journal Article
Cox, T. Scraping sounds and disgusting noises. Applied Acoustics, 69(12), 1195-1204. https://doi.org/10.1016/j.apacoust.2007.11.004

Thirty-four horrible sounds have been examined in an Internet-based psychoacoustic experiment. This paper presents the results for the scraping and disgusting noises used. It is not understood why some humans find certain scraping noises, such as the... Read More about Scraping sounds and disgusting noises.

Towards room acoustics for an elderly population
Presentation / Conference
Davies, W., Cox, T., Kearon, A., Longhurst, B., & Webb, C. Towards room acoustics for an elderly population. Presented at Acoustics 2000, Liverpool

A qualitative social survey has been conducted on a group of 207 elderly people with a hearing loss. The aim of the study was to determine the extent to which acoustic problems in the built environment affect this subject group. The project was th... Read More about Towards room acoustics for an elderly population.

Machine learning challenges to revolutionise hearing device processing
Presentation / Conference
Graetzer, S., Cox, T., Barker, J., Akeroyd, M., Culling, J., & Naylor, G. Machine learning challenges to revolutionise hearing device processing. Poster presented at Speech in Noise (SPiN) 2020, Toulouse, France

In this project, we will run a series of machine learning challenges to revolutionise speech processing for hearing devices. Over five years, there will be three paired challenges. Each pair will consist of a challenge focussed on hearing-device proc... Read More about Machine learning challenges to revolutionise hearing device processing.

Dual frequency band amplitude panning for multichannel audio systems
Presentation / Conference
Hughes, R., Franck, A., Cox, T., Shirley, B., & Fazi, F. Dual frequency band amplitude panning for multichannel audio systems. Presented at 2018 AES International Conference on Spatial Reproduction - Aesthetics and Science, Tokyo, Japan

Panning laws for multi-loudspeaker setups, for example vector base amplitude panning, are typically derived based
on either low or high frequency assumptions. It is well known, however, that auditory cues for both localization and loudness differ at... Read More about Dual frequency band amplitude panning for multichannel audio systems.