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Keynote Speakers

Prof. Mitsunori Mizumachi
Kyushu Institute of Technology, Japan
Title Acoustic Signal Extraction Relying on Spatial Cues
Abstract Sound delivers various information to us in the real world. Human ears can ingeniously extract a specific acoustic event from noisy observation. It is, however, a difficult task for machines with audio input interfaces. For example, speech recognition systems do not work well in adverse conditions such as noisy and reverberant environments, although they work perfectly under quiet environments. A wide variety of acoustic signal extraction methods have been proposed to achieve noise reduction, signal enhancement, sound source separation, and dereverberation. Both humans and machines utilize multiple acoustic cues in the temporal, spectral, and spatial domains for achieving acoustic signal extraction. Acoustic beamforming, that is, spatial filtering based on spatial cues, is one of the most practical techniques in audio applications for PCs, smartphones, tablets, and teleconference systems. In this talk, the acoustic beamforming technique is introduced in the viewpoints from the basic theory to the recent trends.
Kazuya Amimoto
Title Development of a New Outlet Polarity Tester
Abstract In this paper, we illustrate about a new outlet polarity tester which developed in our company. In recent years, it has been an increase in the opportunity to use the power outlet grounding electrode. This is because the use of grounded outlet has been mandated in the interior wiring regulation. Also in the interior wiring regulation, since it has been mandated to properly connect the polarity, polarity test is an essential test until completion of construction. However, in the current general outlet tester may not be able to confirm a false connection of grounded outlet. Further, the conventional polarity test for performing using commercial power test, it has a problem that can not be tested only after receiving.
In order to solve these problems, we have developed a new type of outlet polarity tester. As the result of operation verification, we have confirmed that a new tester has the ability to easily discriminated the 24 type of connection state including a disconnection.