Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Sound interface with two microphones

14.12.2011
In late years, the development of a human robot and the use of the portable information terminal have become popular. Sound interface plays a very important role in this.

Sound interface is usually comprised of speaker (sound) localization, the sounds separation with the environmental sound, noise cancellation and sound recognition. Of these, our study focuses on the sound localization and sound separation.

About sound localization, in our binaural model shown in Fig.1, the sound source direction is represented by using the horizontal angle á and the vertical angle â. Furthermore, the sound localization techniques by the binaural model using the Self-organizing map (SOM) shown in Fig.2 was proposed and correct answer 98.7% was obtained in the anechoic room.

On the other hand, for the sound separation in the true environment including the reverberations, a new method showing in Fig.3, which combining Independent Component Analysis (ICA) with the complex discrete wavelet transform, is proposed and verification of source separation in relation to the problems of permutation and scaling in the ICA are performed. Through comparison of the results according to the Signal Noise Ratio (SNR), the effectiveness of the proposed method is confirmed.

In this study, in order to achieve the sound interface with simple structure and high processing speed, two microphones were used. Furthermore, sound localization method using binaural model and the sound separation method by combining Independent Component Analysis (ICA) with the complex discrete wavelet transform were proposed, their effectiveness have be confirmed. In future, these methods will improve for true environment and achieve the sound interface.

Reference:

Zhong Zhang, Kazuaki, Tetsuo Miyake, Takashi Imamura
Three-Dimensional Sound Localization by Binaural Model Using Self Organizing Map
International Journal of Innovative Computing, Information and Control, 6, 361–371, (2010)
Instrumentation Systems Laboratory, Toyohashi University of Technology
Profile of Zhong Zhang: {http://www.tut.ac.jp/teach/main.php?mode=detail&article=67}

Adarsh Sandhu | Research asia research news
Further information:
http://www.tut.ac.jp
http://www.researchsea.com

More articles from Studies and Analyses:

nachricht Statistical method developed at TU Dresden allows the detection of higher order dependencies
07.02.2020 | Technische Universität Dresden

nachricht Novel study underscores microbial individuality
13.12.2019 | Bigelow Laboratory for Ocean Sciences

All articles from Studies and Analyses >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: A step towards controlling spin-dependent petahertz electronics by material defects

The operational speed of semiconductors in various electronic and optoelectronic devices is limited to several gigahertz (a billion oscillations per second). This constrains the upper limit of the operational speed of computing. Now researchers from the Max Planck Institute for the Structure and Dynamics of Matter in Hamburg, Germany, and the Indian Institute of Technology in Bombay have explained how these processes can be sped up through the use of light waves and defected solid materials.

Light waves perform several hundred trillion oscillations per second. Hence, it is natural to envision employing light oscillations to drive the electronic...

Im Focus: Freiburg researcher investigate the origins of surface texture

Most natural and artificial surfaces are rough: metals and even glasses that appear smooth to the naked eye can look like jagged mountain ranges under the microscope. There is currently no uniform theory about the origin of this roughness despite it being observed on all scales, from the atomic to the tectonic. Scientists suspect that the rough surface is formed by irreversible plastic deformation that occurs in many processes of mechanical machining of components such as milling.

Prof. Dr. Lars Pastewka from the Simulation group at the Department of Microsystems Engineering at the University of Freiburg and his team have simulated such...

Im Focus: Skyrmions like it hot: Spin structures are controllable even at high temperatures

Investigation of the temperature dependence of the skyrmion Hall effect reveals further insights into possible new data storage devices

The joint research project of Johannes Gutenberg University Mainz (JGU) and the Massachusetts Institute of Technology (MIT) that had previously demonstrated...

Im Focus: Making the internet more energy efficient through systemic optimization

Researchers at Chalmers University of Technology, Sweden, recently completed a 5-year research project looking at how to make fibre optic communications systems more energy efficient. Among their proposals are smart, error-correcting data chip circuits, which they refined to be 10 times less energy consumptive. The project has yielded several scientific articles, in publications including Nature Communications.

Streaming films and music, scrolling through social media, and using cloud-based storage services are everyday activities now.

Im Focus: New synthesis methods enhance 3D chemical space for drug discovery

After helping develop a new approach for organic synthesis -- carbon-hydrogen functionalization -- scientists at Emory University are now showing how this approach may apply to drug discovery. Nature Catalysis published their most recent work -- a streamlined process for making a three-dimensional scaffold of keen interest to the pharmaceutical industry.

"Our tools open up whole new chemical space for potential drug targets," says Huw Davies, Emory professor of organic chemistry and senior author of the paper.

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

70th Lindau Nobel Laureate Meeting: Around 70 Laureates set to meet with young scientists from approx. 100 countries

12.02.2020 | Event News

11th Advanced Battery Power Conference, March 24-25, 2020 in Münster/Germany

16.01.2020 | Event News

Laser Colloquium Hydrogen LKH2: fast and reliable fuel cell manufacturing

15.01.2020 | Event News

 
Latest News

Journey to the center of Mars

20.02.2020 | Physics and Astronomy

Laser writing enables practical flat optics and data storage in glass

20.02.2020 | Physics and Astronomy

New graphene-based metasurface capable of independent amplitude and phase control of light

20.02.2020 | Power and Electrical Engineering

VideoLinks
Science & Research
Overview of more VideoLinks >>>