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論文 - 中藤　良久

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Study of volume limit for headphone hearing loss prevention on portable music player 査読有り

Higashi T., Tanaka Y., Nakatoh Y.

2016 IEEE International Conference on Consumer Electronics, ICCE 2016 397 - 398 2016年03月

担当区分：責任著者記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）

In recent years, portable music players become popular due to high usability. However, EU and WHO have pointed out that there is a possibility of causing hearing loss when users listen to music at loud volume and long time. Therefore, it is necessary how to prevent hearing loss. In previous research, it found optimum volume level when listening to music. But it didn't find noticed volume level by listener when volume level of music is gradually attenuated. In this paper, we evaluated whether to be able to lower from loud volume level to safe volume level without the users notice. First, we measured the volume level that the users listen to music daily. We called this volume the optimum listening level. As a result, we found that seven out of the twelve listened to volumes more than 80dB. Next, we measured the difference of level between the 85 dB volume level and the volume level noticed by users when volume level of music is gradually attenuated. We called this difference of level the difference of perceived level by attenuating. As a result, young people noticed when volume level was attenuated 12 ±4 dB without being affected changing attenuation rate of volume level. Elderly people noticed in the range of 13 ± 4 dB as with young people.

DOI： 10.1109/ICCE.2016.7430663

Scopus

その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84965121743&origin=inward

Detecting system of approaching vehicles using an ultrasonic wave 査読有り

Furuno Y., Tanaka Y., Nakatoh Y.

2016 IEEE International Conference on Consumer Electronics, ICCE 2016 393 - 394 2016年03月

担当区分：責任著者記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）

The elderly population is increasing, and the traffic environment surrounding elderly people is not safe. We can prevent traffic accidents at an early stage by jumping out of the way if we perceive that the approaching vehicle may collide with the walking elderly person. Therefore, we think that it would be useful if we could build a system to inform us of the approaching vehicle by a supersonic wave. In this paper, using a supersonic wave loudspeaker attached to a vehicle, we proposed the technique to detect approaching vehicles on the sidewalk. We found that we could detect areas around 50 m with a high probability of more than 80% by using a tone burst as input to the supersonic wave loudspeaker.

DOI： 10.1109/ICCE.2016.7430661

Scopus

その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84965178007&origin=inward

Improvement of Speech Intelligibility for Elderly People Based on Formant Frequency Shift 査読有り

Yuto Tanaka, Mizumachi Mitshunori,Yoshihisa Nakatoh

Proceedings of NCSP2016 2016年03月

Development of Wearable Speech Enhancement System for Laryngectomees 査読有り

Kenta Kimura, Kenji Matsui, Yoshihisa Nakatoh, Yumiko Ono Kato

Proceedings of NCSP2016 2016年03月

Improvement of Word Intelligibitlity Based on ITD and ILD Control on Binaural Hearing Aids 査読有り

Ryota Fujiwara, Yuto Tanaka, Yoshihisa Nakatoh

Proceedings of NCSP2016 2016年03月

Text-reading Support System for the Visually Impaired on Web Sites 査読有り

Takumi Misawa，Yuto Tanaka，Yoshihisa Nakatoh

Proceedings of NCSP2016 2016年03月

Design of elder-friendly auditory signals for microwave ovens 査読有り国際誌

Kadota N., Mizumachi M., Nakatoh Y.

2015 4th International Conference on Informatics, Electronics and Vision, ICIEV 2015 2015年11月

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）

© 2015 IEEE. Recent house electrical appliances generate a number of auditory signals, when a user operates an appliance or an appliance draws attention to a user. In this paper, we focus on multi-functional microwave ovens, which commonly have several auditory signals for user's operation, error occurrence, completion of cooking, and so on. A wide variety of auditory signals for current microwave ovens have two problems: it is difficult for users to image what the auditory signals inform, and the auditory signals including high frequency components are not friendly for elderly users. In this paper, popular auditory signals for microwave ovens were subjectively evaluated with/without an elderly-simulated band-pass filter, which simulated an averaged audiogram of elder people, on the five grade scales of easiness of perception, unpleasantness, and emergency. Experimental results suggest that young and elderly people might imagine different function for a single auditory signal. Finally, suitable auditory signals both for young and elderly users are proposed in the viewpoints of frequency and temporal patterns.

DOI： 10.1109/ICIEV.2015.7333977

Scopus

その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84961778212&origin=inward

Study of the Volume Limit for Hearing Protection in the Music Listening 査読有り

Teruhisa Higashi, Yuto Tanaka, Yoshihisa Nakatoh