All Outputs (125)

How Science Works GCSE (2011)
Other
Cox, T. (2011). How Science Works GCSE

Classroom videos, CPD videos, CPD materials and curriculum resources to accompany four How Science Works videos in YouTube

Acoustic iridescence (2011)
Journal Article
Cox, T. (2011). Acoustic iridescence. ˜The œJournal of the Acoustical Society of America (Online), 129(3), 1165-1172. https://doi.org/10.1121/1.3531804

An investigation has been undertaken into acoustic iridescence, exploring how a device can be constructed which alter sound waves, in a similar way to structures in nature that act on light to produce optical iridescence. The main construction had ma... Read More about Acoustic iridescence.

Volumetric diffusers : pseudorandom cylinder arrays on a periodic lattice (2010)
Journal Article
Hughes, R., Angus, J., Cox, T., Umnova, O., Gehring, G., Pogson, M., & Whittaker, D. (2010). Volumetric diffusers : pseudorandom cylinder arrays on a periodic lattice. ˜The œJournal of the Acoustical Society of America (Online), 128(5), 2847-2856. https://doi.org/10.1121/1.3493455

Most conventional diffusers take the form of a surface based treatment, and as a result can only operate in hemispherical space. Placing a diffuser in the volume of a room might provide greater efficiency by allowing scattering into the whole space.... Read More about Volumetric diffusers : pseudorandom cylinder arrays on a periodic lattice.

Coupling of a time domain boundary element method to compliant surface models (2010)
Presentation / Conference
Hargreaves, J., & Cox, T. (2010, September). Coupling of a time domain boundary element method to compliant surface models. Presented at EAA Euroregio Conference, Ljubljana

The Boundary Element Method (BEM) can be used to predict the scattering of sound in rooms. It reduces the problem of modelling the volume of air to one involving only the surfaces; hence the number of unknowns scales more favourably with problem size... Read More about Coupling of a time domain boundary element method to compliant surface models.

Diffusive benefits of cylinders in front of a Schroeder diffuser (2010)
Journal Article
Pogson, M., Whittaker, D., Gehring, G., Cox, T., Hughes, R., & Angus, J. (2010). Diffusive benefits of cylinders in front of a Schroeder diffuser. ˜The œJournal of the Acoustical Society of America (Online), 128(3), 1149-1154. https://doi.org/10.1121/1.3463817

A numerical investigation is performed into the diffusive effects of cylinders positioned in front of a Schroeder diffuser. A regular line of cylinders is shown to offer notable improvements to diffusion from a periodic Schroeder device, provided lat... Read More about Diffusive benefits of cylinders in front of a Schroeder diffuser.

Multiple scattering between cylinders and a schroeder diffuser (2010)
Journal Article
Pogson, M., Whittaker, D., Gehring, G., Hughes, R., Angus, J., & Cox, T. (2010). Multiple scattering between cylinders and a schroeder diffuser. Acta acustica united with Acustica, 96(2), 292-299. https://doi.org/10.3813/AAA.918278

A multiple scattering method is developed to model an array of N cylinders positioned in front of a Schroeder diffuser. Results are compared against the more computationally intensive boundary element method, as well as existing multiple scattering m... Read More about Multiple scattering between cylinders and a schroeder diffuser.

A transient boundary element method for acoustic scattering from mixed regular and thin rigid bodies (2009)
Journal Article
Hargreaves, J., & Cox, T. (2009). A transient boundary element method for acoustic scattering from mixed regular and thin rigid bodies. Acta acustica united with Acustica, 95(4), 678-689. https://doi.org/10.3813/AAA.918196

Boundary Element Methods (BEMs) may be used to predict the scattering of sound by obstacles, which has accelerated the prototyping of new room acoustic treatments such as diffusers. Unlike the more popular frequency domain method, the time domain BE... Read More about A transient boundary element method for acoustic scattering from mixed regular and thin rigid bodies.

Blind estimation of room acoustic parameters from speech and music signals (2009)
Thesis
Kendrick, P. Blind estimation of room acoustic parameters from speech and music signals. (Thesis). University of Salford

The acoustic character of a space is often quantified using objective room acoustic parameters. The measurement of these parameters is difficult in occupied conditions and thus measurements are usually performed when the space is un-occupied. This is... Read More about Blind estimation of room acoustic parameters from speech and music signals.

Acoustic absorbers and diffusers: theory, design and application (2009)
Book
Cox, T., & D'Antonio, P. (2009). Acoustic absorbers and diffusers: theory, design and application. Routledge Taylor & Francis

Absorbers and diffusers are two of the main design tools for altering the acoustic conditions of rooms, semi-enclosed spaces and the outdoor environment. Their correct use is important for delivering high quality acoustics. Unique and authorit... Read More about Acoustic absorbers and diffusers: theory, design and application.

A transient boundary element method model of Schroeder diffuser scattering using well mouth impedance (2008)
Journal Article
Hargreaves, J., & Cox, T. (2008). A transient boundary element method model of Schroeder diffuser scattering using well mouth impedance. ˜The œJournal of the Acoustical Society of America (Online), 124(5), 2942-2951. https://doi.org/10.1121/1.2982420

Room acoustic diffusers can be used to treat critical listening environments to improve sound quality. One popular class is Schroeder diffusers, which comprise wells of varying depth separated by thin fins. This paper concerns a new approach to ena... Read More about A transient boundary element method model of Schroeder diffuser scattering using well mouth impedance.

Monaural room acoustic parameters from music and speech (2008)
Journal Article
Kendrick, P., Cox, T., Li, F., Zhang, Y., & Chambers, J. (2008). Monaural room acoustic parameters from music and speech. ˜The œJournal of the Acoustical Society of America (Online), 124(1), 278-287. https://doi.org/10.1121/1.2931960

This paper compares two methods for extracting room acoustic parameters from reverberated speech and music. An approach which uses statistical machine learning, previously developed for speech, is extended to work with music. For speech, reverberatio... Read More about Monaural room acoustic parameters from music and speech.

Internet and mobile technologies for a public role in noise surveying (2008)
Presentation / Conference
Mydlarz, C., Drumm, I., & Cox, T. (2008, June). Internet and mobile technologies for a public role in noise surveying. Poster presented at Paris ASA Conference, Paris, France

The traditional method of noise surveying is to use trained professionals to go to a specific site to measure and assess noise levels using dedicated and expensive equipment. This project aims to enfranchise the public by providing them with the oppo... Read More about Internet and mobile technologies for a public role in noise surveying.

Involving the public in noise surveys via mobile technology (2008)
Presentation / Conference
Mydlarz, C., Drumm, I., & Cox, T. (2008, April). Involving the public in noise surveys via mobile technology. Presented at IOA Spring Conference 2008, Reading, UK

The IMPRINtS project (Internet and Mobile technologies for a Public Role In Noise Surveying) aims to enable and encourage public participation in a large-scale environmental noise survey. The primary objective of this work is to raise public awarenes... Read More about Involving the public in noise surveys via mobile technology.

Lüke and power residue sequence diffusers (2008)
Journal Article
Dadiotis, K., Angus, J., & Cox, T. (2008). Lüke and power residue sequence diffusers. ˜The œJournal of the Acoustical Society of America (Online), 123(4), 2035-2042. https://doi.org/10.1121/1.2885761

Conventional Schroeder diffusers have been successfully used for many years. However, their frequency range is limited by the flat plate effect that occurs when all the wells radiate in phase. This occurs at harmonics of p times the design frequency... Read More about Lüke and power residue sequence diffusers.

A combined blind source separation and adaptive noise cancellation scheme with potential application in blind acoustic parameter extraction (2008)
Journal Article
Zhang, Y., Chambers, J., Kendrick, P., Cox, T., & Li, F. (2008). A combined blind source separation and adaptive noise cancellation scheme with potential application in blind acoustic parameter extraction. Neurocomputing, 71(10-12), 2127-2139. https://doi.org/10.1016/j.neucom.2007.09.019

Room acoustic parameters such as reverberation time (RT) can be extracted from passively received speech signals by certain ‘blind’ methods, thereby mitigating the need for good controlled excitation signals or prior information of the room geometry.... Read More about A combined blind source separation and adaptive noise cancellation scheme with potential application in blind acoustic parameter extraction.

The photo‐survey research method : capturing life in the city (2008)
Journal Article
Moore, G., Croxford, B., Adams, M., Refaee, M., Cox, T., & Sharples, S. (2008). The photo‐survey research method : capturing life in the city. Visual Studies, 23(1), 50-62. https://doi.org/10.1080/14725860801908536

Recent promotion of city centre living within UK policy has led to a commensurate interest in city centre conditions and the opinions and experiences of the people who live there. An apposite, straightforward method to capture city centre residents'... Read More about The photo‐survey research method : capturing life in the city.

Acoustics of activated carbon (2008)
Thesis
Bechwati, F. Acoustics of activated carbon. (Thesis). Salford : University of Salford

This thesis describes a study into how sound interacts with activated carbon, a material that exhibits adsorbing and desorbing properties. Adsorption is where molecules from the surrounding gas are attracted to the material microstructure and hel... Read More about Acoustics of activated carbon.

A time domain boundary element method for compliant surfaces (2008)
Presentation / Conference
Hargreaves, J., & Cox, T. (2008, January). A time domain boundary element method for compliant surfaces. Presented at EURONOISE, the 155th ASA Meeting, and the 9th Congrès Français d'Acoustique, Paris, France

The best way of representing compliant surfaces in time domain prediction models, such as the transient Boundary Element Method (BEM), is currently unresolved. This is not true of frequency-domain, time-invariant models, where the common practice is... Read More about A time domain boundary element method for compliant surfaces.

A stable time domain BEM for diffuser scattering (2007)
Presentation / Conference
Hargreaves, J., & Cox, T. (2007, September). A stable time domain BEM for diffuser scattering. Presented at 19th International Congress on Acoustics, Madrid

Boundary Element Methods (BEMs) may be used to model scattering of sound by surfaces such as diffusers, accelerating prototyping of new Room Acoustics treatments. Unlike the more widely used frequency domain method, the time domain BEM is usually sol... Read More about A stable time domain BEM for diffuser scattering.

Blind estimation of reverberation parameters for non-diffuse rooms (2007)
Journal Article
Kendrick, P., Li, F., Cox, T., Zhang, Y., & Chambers, J. (2007). Blind estimation of reverberation parameters for non-diffuse rooms. Acta acustica united with Acustica, 93(5), 760-770

Reverberation time is an important objective parameter for the acoustics of enclosed spaces. Blind estimation of the reverberation time from naturally occurring sound sources alleviates the logistical constraints of traditional measurement methods, a... Read More about Blind estimation of reverberation parameters for non-diffuse rooms.