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Mr Khemapat Tontiwattanakul BEng (Mehcanical Engineering), MEng (Mechanical Engineering)

Alumni

Mr Khemapat Tontiwattanakul is Postgraduate research student within Engineering and the Environment at the University of Southampton.

Khemapat obtained his B.Eng. and M.Eng degrees in mechanical engineering from the King Mongkut’s Institute of Technology North Bangkok (KMITNB), Thailand in 2006. He has been sponsored by Royal Thai Government for his PhD to study in audio signal processing. Khemapat is currently a postgraduate research student in the Acoustics Group, ISVR. His main research interests are microphone arrays and multichannel audio recording. His PhD project is focused on the study microphone arrays with unconventional transducer arrangements and on the development of beamforming techniques using the Boundary Element Method.

Research

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Research interests

Microphone arrays are widely used for acoustic measurements which are useful in architectural design. Recently, microphone array is introduced to audio recording in the sense of changeable directivity microphone.
The majority of array transducer arrangements have been developed from the conventional coordinate systems (linear arrays, cylindrical arrays, and spherical arrays). In these cases, explicit mathematical expressions for the beamformer can be obtained in closed form. However, when transducers are mounted on the surface of a scattering object with more complex shapes, an analytical solution for the beamformer cannot, in general, be obtained. The Boundary Element Method (BEM) is a useful technique to tackle to this problem numerically. In this research, the BEM will be used in design of a beamformer for a complex geometry array.

PhD supervisors

F.M. Fazi, P.A. Nelson

Affiliated research groups

Virtual Acoustics and Audio Engineering

Measuring the acoustics at Ightham Mote, a medieval house in Kent — Acoustics measurement

Beampatterns of individual omnidirectional microphone element of a rigid spherical array computed with the BEM — Spherical microphone array

Experiment on a spherical microphone array in ISVR’s large anechoic chamber — Anechoic experiments

Research group

Mr Khemapat Tontiwattanakul
Filippo Fazi
ISVR
University of Southampton
Southampton
SO17 1BJ
United Kingdom

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