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Featured researches published by Toshihiro Azami.


IEEE Transactions on Human-Machine Systems | 2014

Biosignals Sensing by Novel Use of Bidirectional Microphones in a Mobile Phone for Ubiquitous Healthcare Monitoring

Kajiro Watanabe; Yosuke Kurihara; Ko Watanabe; Toshihiro Azami; Shoko Nukaya; Hiroshi Tanaka

This paper describes a novel application of the bidirectional audio microphones in mobile phones to measure biosignals for ubiquitous health monitoring. The bidirectional microphone has two pressure-detecting ports. A pressure-detecting film receives the differential pressure between the ports. We apply this idea to biosignal measurements for a mobile phone. We used the microphone as 1) a sphygmograph at the fingertip, 2) a stethoscope in which a delay time sensor of pulse wave arrivals from the neck near the carotid or chest near the heart to the fingertip, and 3) a bed sensing device for biosignals. When used as a sphygmograph, it detects the wave similar to the second derivative of the conventional optical pulse oxymeter output wave. When used as a stethoscope, it detects cardiac sound and the pulse wave and respiration. With two microphones, the delay time from the neck carotid to the fingertip is detected.


Archive | 2001

Device control system

Toru Kamiwada; Toshihiro Azami; Takushi Fujita


Archive | 2002

Scheduled recording and replaying of broadcast programs

Toshihiro Sonoda; Tomoyoshi Takebayashi; Toshihiro Azami; Fumio Honda; Yasuo Sato; Makoto Morioka; Shinichi Ono; Midori Fukai


Archive | 1991

ISDN interface unit

Tomoyoshi Takebayashi; Toshihiro Azami; Ryuichi Matsukura; Hiroki Hasegawa; Satoshi Okuyama


Archive | 1997

Object editing method, object editing system and computer memory product

Toshihiro Azami


Archive | 1996

Conference support system with user operation rights and control within the conference

Satoru Watanabe; Souichi Okada; Toshihiro Azami; Jun Kakuta; Tsuneo Katsuyama


Archive | 2003

Multichannel information processing device

Toshihiro Azami; Katsutoshi Yano; Tomoharu Matsushita; Tomonori Yasumoto


Archive | 2003

Controlling mobile telephone by operating information processing apparatus

Toshihiro Azami; Toshihiro Sonoda; Tomoyoshi Takebayashi; Yasuo Sato; Makoto Morioka; Shinichi Ono; Midori Fukai


Archive | 1995

ISDN interface unit with separate ring generator

Tomoyoshi Takebayashi; Toshihiro Azami; Ryuichi Matsukura; Hiroki Hasegawa; Satoshi Okuyama


Archive | 2001

Multi-channel information processor

Toshihiro Azami; Katsutoshi Yano; Tomoharu Matsushita; Tomonori Yasumoto

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