Dr Yusuke Hioka

BE, ME, PhD (Keio University, Japan), PGCertTertTchg(Canterbury), SMIEEE


I received my B.E., M.E., and Ph.D. degrees in engineering in 2000, 2002, and 2005 from Keio University, Yokohama, Japan. From 2005 to 2012, I was with the NTT Cyber Space Laboratories (now NTT Media Intelligence Laboratories), Nippon Telegraph and Telephone Corporation (NTT). From 2010 to 2011, I was also a visiting researcher at Victoria University of Wellington. In 2013 I came back to New Zealand and was appointed as a Lecturer at the University of Canterbury, Christchurch. Then in 2014, I joined the Department of Mechanical Engineering.

Research | Current

Since I was studying towards my PhD I have been specialised in audio and acoustic signal processing particularly focusing on microphone arrays which is a technology that enables us to emphasise sound arriving from particular directions/locations.

After I received my degree I worked at industry for nearly 8 years where I had many opportunities to utilise my expertise in developing commercial products as well as growing my academic career. Because of this industrial experience majority of my research focuses on problems in real world. I always try to invent technologies that are practically effective and feasible but are also supported by theoretical principles. Some of my inventions have been adopted in commercial products which have been attracting many users/customers' interests.

Besides audio and acoustic signal processing, recently I am also interested in wider field related to sound such as speech, audiology, and linguistics. 

Teaching | Current

MECHENG201: Electronics and Computing for Mechanical Engineers (2017)

MECHENG370: Analogue Circuit Design (Course Coordinator; 2015-)

MECHENG313: Real-time Software Design (2014-)

MECHENG705: Mechatronics Systems (2015-)

MECHENG726: Acoustics for Engineers (2017-)

Postgraduate supervision

M.E. Mr Francis Del Prado - From March 2015 to February 2016.
PhD Mr Khairul Affendy Md Nor - From March 2016 onwards. (Co-supervisor)
PhD Mr Benjamin Yen - From July 2016 onwards.


AUEA Emerging Researcher Award - 2016


Mechatronics Course Advisor

Faculty Research Committee Member

Areas of expertise

  • Array signal processing
  • Audio/acoustic/speech signal processing
  • Room acoustics

Member of the Acoustics Group: http://www.acoustics.auckland.ac.nz/

Committees/Professional groups/Services

  • Senior member of IEEE.
  • Commitee member of IEEE NZ Signal Processing / Information Theory Chapter
    • 2015: Vice Chair
    • 2016 -: Chair
  • Member of IEICE (Institute of Electronics, Information and Communication Engineers).
  • Member of ASJ (Acoustical Society of Japan).

Selected publications and creative works (Research Outputs)

  • Hioka, Y., & Niwa, K. (2017). Estimating power spectral density for spatial audio signal separation: An effective approach for practical applications. Acoustical Science and Technology, 38 (4), 175-184. 10.1250/ast.38.175
  • Hioka, Y., Tang, J. W., & Wan, J. (2016). Effect of adding artificial reverberation to speech-like masking sound. Applied Acoustics, 114, 171-178. 10.1016/j.apacoust.2016.07.014
    URL: http://hdl.handle.net/2292/30125
  • Niwa, K., Hioka, Y., & Kobayashi, K. (2016). Optimal microphone array observation for clear recording of distant sound sources. IEEE Transactions on Audio, Speech and Language Processing, 24 (10), 1785-1795. 10.1109/TASLP.2016.2585879
    URL: http://hdl.handle.net/2292/31856
  • Hioka, Y., KIngan, M., Schmid, G., & Stol, K. (2016). Speech enhancement using a microphone array mounted on an unmanned aerial vehicle. Acoustic Signal Enhancement (IWAENC), 2016 IEEE International Workshop on Xi'an, China: IEEE. 10.1109/IWAENC.2016.7602937
    Other University of Auckland co-authors: Michael Kingan, Gian Schmid, Karl Stol
  • Hioka, Y., & Niwa, K. (2015). PSD estimation in beamspace for estimating direct-to-reverberant ratio from a reverberant speech signal. Proc. ACE Challenge Workshop, a satellite event of WASPAA, New Paltz, NY, USA, 2015 New Paltz, NY, USA. Related URL.
    URL: http://hdl.handle.net/2292/27468
  • Hioka, Y., Furuya, K., Kobayashi, K., Niwa, K., & Haneda, Y. (2013). Underdetermined Sound Source Separation Using Power Spectrum Density Estimated by Combination of Directivity Gain. IEEE Transactions on Audio, Speech, and Language Processing, 21 (6), 1240-1250. 10.1109/TASL.2013.2248715
    URL: http://hdl.handle.net/2292/23458
  • Hioka, Y., Furuya, K., Kobayashi, K., Sakauchi, S., & Haneda, Y. (2012). Angular region-wise speech enhancement for hands-free speakerphone. IEEE Transactions on Consumer Electronics, 58 (4), 1403-1410. 10.1109/TCE.2012.6415013
  • Hioka, Y., Niwa, K., Sakauchi, S., Furuya, K., & Haneda, Y. (2011). Estimating Direct-to-Reverberant Energy Ratio Using D/R Spatial Correlation Matrix Model. IEEE Transactions on Audio, Speech, and Language Processing, 19 (8), 2374-2384. 10.1109/TASL.2011.2134091
    URL: http://hdl.handle.net/2292/23459


Contact details

Office hours

By appointment only

Primary location

Level 7, Room 714
New Zealand

Social links

Web links