We examined a change of the mean gaze distribution, a change of the head angle of rotation, and a change of the convergence eye movement to objectively evaluate the difference of the effect brought by 2 channels stereo and 5.1 channels sound surround.

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Noise control has been developed to establish the comfortable soundscape even if our house life. Floor impact noise such as the sound of footsteps or falling object becomes a problem in an apartment house. Floor impact noise has a peak at the low-frequency range. Passive noise control is not effective against low-frequency noise. Therefore, the purpose of this paper is to control the impact noise using active noise control. Since each impact noise is generated in a short period, LMS algorithm is difficult to use because of its slow convergence characteristics. On the other hand, frequency domain adaptive algorithm is known for fast convergence characteristics. In this paper, the effectiveness of active noise control using frequency domain adaptive algorithm is confirmed through simulations and experiments.

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There are many noise sources around us. Floor impact noise such as the sound of footsteps and falling object becomes a problem in an apartment house. Floor impact noise has a peak at the low-frequency range and passive noise control for floor impact noise is difficult to control. Therefore, the purpose in this paper is control the impact noise with active noise control. Since the impact noise comes separately, active noise control with LMS algorithm based on the steepest descent method is difficult to the extent of slow convergence characteristics. In this paper, the effectiveness of active noise control using frequency domain adaptive algorithm that has fast convergence characteristics is confirmed through simulations and experiments.

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衝突噴流は，よどみ点近傍で高い熱伝達を与えることが知られている．その熱伝達の能動的制御方法例として，噴流に音場を励起し音場入射方向に一様性を向上させる方法や，噴流にミストを付加し潜熱の利用により最大熱伝達率を向上する方法が報告されている．本研究では，オリフィス噴流における音場やミストの付加方法の違いによる衝突熱伝達特性について，制御の可能性を検討するため，実験的に調査した．

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新型MAZDA3では，マツダが考える音響性能の理想を定義し，量産性を見据え機能配分しスピーカーユニット，レイアウトを一新した。理想の音響性能を追求するため，CAE技術による車室内の音場特性の可視化を行いスピーカーユニットの最適な配置場所を見出した。容量3リットルのバスレフ型ウーファーのカウルサイド配置と，スコーカーとツィーターのドア上部への配置をベースとするシステムで，新型MAZDA3のサウンドは新世代商品群のリードとなる車種にふさわしい音響性能を実現した。本稿では，その内容について紹介する。

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In recent years，with the spread of streaming distribution and video sharing services，opportunities to listen to music in various places have increased．There are many researches that can improve the musical experience by tactile stimulation．We aimed to improve the musical experience by presenting three-dimensional video expression via HMD．The goal of our research is to process real-world scenes and to create visual representations in AR visual representations. In this paper，as a preliminary experiment, we examined the influence on music by presenting a three-dimensional video expression with music．In order to evaluate the proposed method，the change in the immersive feeling in the music is evaluated through comparison with the reproduction of the conventional video expression．

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It is currently discussed how to multichannel productions on the many international conventions, because audio format of digital broadcasting in Western countries has 6 audio channels. This paper describes the trend of multichannel audio productions by the Western broadcasting stations and views the microphone techniques of multichannel audio in musical productions.

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Virtual reality (VR) has long been used to impart a heightened sense of reality to the user by artificially generating various stimuli. We hypothesize that generating emotions during a VR experience helps to enhance the immersive experience. Therefore, we developed an interactive walk-through system named Emotion Hacking VR (EHVR) that measures user heart rate and provides false vibrotactile feedback to amplify the VR fear experience. To determine the effectiveness of the false vibrotactile feedback, we conducted a comparative experiment to evaluate three calculation methods used to generate the false heart rate. We adapted the most effective method to accelerate the user heart rate in the EHVR system and conducted a hands-on exhibition at the Asia Digital Art Award 2017 exhibition at Fukuoka Asian Art Museum. The objective and subjective results obtained from participants indicate that the increased real heart rate caused by EHVR affected the VR fear experience.

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Noise control has been developed to establish the comfortable soundscape even if our house life. Floor impact noise such as the sound of footsteps or falling object becomes a problem in an apartment house. Floor impact noise has a peak at the low-frequency range. Passive noise control is not effective against low-frequency noise. Therefore, the purpose of this paper is to control the impact noise using active noise control. In our previous research, the situation of fixed vibration source and control point was considered. In this paper, we consider about changing vibration source and control point. First, this research focus on changing control point. In this paper, the effectiveness of active noise control using frequency domain adaptive algorithm with processing that compute the control noise through the use of vibration modes is confirmed through simulations.

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MAZDA3は長きにわたりお客様との絆を深めてきた，マツダブランドの顔ともいえる特別なモデルである。近年の自動車産業にとって構造改革が迫られるほどの変化が起きている中で，世界中の全てのお客様に再び驚きと歓びを与えるために，マツダはこの特別なモデルであるMAZDA3を新世代商品群の幕開けを飾るモデルとして世に送り出した。

新型MAZDA3が目指したのは，「誰もが羨望するクルマ」になることである。奇をてらうことなく，走り・静粛性・クラフトマンシップ・環境性能・デザインなどクルマとして当たり前のことを，徹底的な人間研究に基づき感動のレベルまで高めることに挑戦した。

まるで歩いているかのような自然な運転感覚。人間の耳が感じる音の変化や届き方までコントロールした静粛性。あらゆる音域をクリアに好みに合わせて楽しむことができるオーディオシステム。ハッチバック（ファストバック）とセダン，それぞれのボディタイプで強い個性を持たせたエクステリアデザイン。

これらの魅力に溢れた新型MAZDA3がお客様の日常をより色鮮やかに輝かせる存在になると確信している。

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太陽光発電による小規模な独立型電源（Solar Home System、以下SHS）は系統電力網が整備されていない地域で、安価に再生可能エネルギーによる電化が可能と期待され、アフリカ農村において2000年頃から急速に普及が進んでいる。しかし、SHSの世帯レベルの電気の利用状況に着目した事例研究は少なく、住民が問題を抱えるに至る要因やそれによって農村住民にもたらされる影響は明らかにされていない。そこで本稿では、タンザニア南西部の農村での現地調査をとおして、SHSの普及状況と不適正利用の実態とその要因を明らかにした。調査はSHSを所有する32世帯とSHS販売者へのヒアリング調査、およびSHSを所有する世帯から10世帯を抽出してデータロガーによる出力測定をおこなった。結果、ほとんどの世帯がシステムの要となるバッテリーの管理に問題を抱えており、そのための経済的損失が示唆された。アフリカの電化状況や関連政策の評価はこのような利用の実態をふまえることが不可欠である。

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To address complaints about irritating sounds on train station platforms beyond the limitation of conventional noise reduction approaches, we applied the hypersonic effect, which refers to the positive way in which inaudible complex high frequency components (HFCs) produces a salutary physiological and psychological effect on human through the activation of fundamental brain. We created a virtual platform acoustic environment in the experimental room as well as actual platform space by reproducing highly accurate broadband recordings of actual platform sounds. We developed hypersonic contents of effective HFCs obtained from a rainforest environment and developed hypersonic public announcements and hypersonic departure bells containing HFCs. We evaluated the psychological and physiological effects of hypersonic contents presented alongside the platform acoustic environment. Subjects showed significantly more positive impression of the acoustic environment and significantly greater alpha 2-electroenchephalography potential, indicating the efficacy of the hypersonic effect in ameliorating the unpleasantness of a noisy environment.

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