Forthcoming Meetings

SPHERICAL MICROPHONE ARRAYS: THEORY AND APPLICATIONS

Date: 15 Dec 2017
Time: 18:00

Location: King’s College – Bush House
Bush House
London

Abstract:

Spherical microphone arrays have found wide use in three dimensional acoustical applications such as higher-order Ambisonics, object-based spatial audio, and sound source localisation. There are two main types of spherical microphone arrays: rigid and open. Rigid spherical microphone arrays consist of microphones positioned on the surface of a rigid spherical scatterer and open spherical arrays consist of microphones arranged in a spherical constellation without a scatterer. Sound source localisation, source separation and acoustic scene analysis algorithms have been developed in the past decade using these types of arrays. In this seminar, an introduction to the theory of spherical arrays will be presented first. Practical implications of processing signals recorded using such arrays along with their physical limitations will be discussed. Several practical examples using both open and rigid microphone arrays will be presented.
Presenter:

Huseyin Hacıhabiboglu received his B.Sc. (honors) degree from the Middle East Technical University (METU), Ankara, Turkey, in 2000 and his M.Sc. degree from the University of Bristol, United Kingdom, in 2001, both in electrical and electronics engineering, and his Ph.D. degree in computer science from Queen’s University Belfast, United Kingdom, in 2004. He held research positions at the University of Surrey, Guildford, United Kingdom, (2004–2008) and King’s College London, United Kingdom (2008–2011). Currently, he is an associate professor of signal processing and head of the Department of Modeling and Simulation in the Graduate School of Informatics, METU. He also coordinates the recently established multimedia informatics graduate program in the same department. His research interests include audio signal processing, room acoustics, multichannel audio systems, psychoacoustics of spatial hearing, microphone array


Applications of perceptual psychology and neuroscience to audio engineering problems

Date: 29 Jan 2018
Time: 18:00

Location: Department of Theatre, Film and Television, University of York
Department of Theatre, Film and Television, University of York
York

Title – Applications of perceptual psychology and neuroscience to audio engineering problems

Authors –  Cleopatra Pike, School of Psychology and Neuroscience, University of St Andrews.
Amy V Beeston, School of Music, University of Leeds

 

Human psychology and neuroscience are involved in the design of many audio products. Firstly, they can be used to determine whether the products suit the needs of the people they aim to serve. ‘Human-technology interaction’ research is conducted to ascertain how humans respond to audio products – where they help and where they hinder.  However, issues remain with this research, such as getting reliable reports from people about their experience.

Secondly, psychology and neuroscience can be used to solve engineering problems via ‘human inspired approaches’ (e.g. they can be used produce robots that listen like humans in noisy environments). To fulfil this aim audio engineers and psychologists must determine the biological and behavioural principles behind how humans listen.  However, the human hearing system is a black-box which has developed over years of evolution. This makes understanding and applying human principles to technology challenging.

We discuss some of the benefits and issues involved in an interdisciplinary approach to developing audio products. We include examples from our research investigating how machine listeners might simulate human hearing in compensating for reverberation and spectral distortion, how machine listeners might achieve the perceptual efficiency of humans by optimally combining multiple senses, and how the input from tests on humans can be used to optimise the function of hearing aids.