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All Outputs (125)

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
Davies, W., Cox, T., & Lam, Y. (1996). Subjective perception of seat dip attenuation. Acta acustica united with Acustica, 82(5), 784-792

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.

The effects of centrifugal blowers, control valves, attenuating devices and reservoir resonance on organ pipe flutter
Thesis
Taylor, A. (in press). The effects of centrifugal blowers, control valves, attenuating devices and reservoir resonance on organ pipe flutter. (Thesis). Computing,Science and Engineering

The aim of this research is to investigate the noticeable organ pipe flutter that may, under certain conditions, exist on a sounding organ pipe. The effectiveness of a pipe organ wind system is notoriously difficult to predict. For many years pipe or... Read More about The effects of centrifugal blowers, control valves, attenuating devices and reservoir resonance on organ pipe flutter.

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.

Distortion and clipping in audio, automatic detection and metering
Dataset
Kendrick, P., Jackson, I., Li, F., Cox, T., & Fazenda, B. (2015). Distortion and clipping in audio, automatic detection and metering. [Dataset]

For field recordings and user generated content recorded on phones, tablets and other mobile devices, nonlinear distortions caused by clipping and limiting at pre-amplification stages and dynamic range control (DRC), are common causes of poor audio q... Read More about Distortion and clipping in audio, automatic detection and metering.

The sound book: The science of the sonic wonders of the world
Book
Cox, T. The sound book: The science of the sonic wonders of the world. London: W. W. Norton & Company

Trevor Cox is on a hunt for the sonic wonders of the world. A renowned expert who engineers classrooms and concert halls, Cox has made a career of eradicating bizarre and unwanted sounds. But after an epiphany in the London sewers, Cox now revels in... Read More about The sound book: The science of the sonic wonders of the world.

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.