The design and evaluation of a novel programmable multi-channel digital underwater acoustic biotelemetry system using single-chip microcontrollers is described. It is intended for monitoring the respiration rate, heart rate (or the electrocardiogram, ECG) and depth of a free-swimming diver, and may be described as a through-water telemedicine system. Owing to its modular design, the system can be adapted for the transmission of digital data representing any physiological or physical parameter. The use of a microcontroller in the transmitter allows signals from each sensor to be transmitted in a priority-interrupt time-division multiplexed format with programmable frequency coding. An identical microcontroller in the receiver scans the frequency-coded signals, which are captured and interfaced to a computer for further processing.
Document Type: Research Article
Publication date: January 1, 2003
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Acta Acustica united with Acustica, published together with the European Acoustics Association (EAA), is an international, peer-reviewed journal on acoustics. It publishes original articles on all subjects in the field of acoustics, such as general linear acoustics, nonlinear acoustics, macrosonics, flow acoustics, atmospheric sound, underwater sound, ultrasonics, physical acoustics, structural acoustics, noise control, active control, environmental noise, building acoustics, room acoustics, acoustic materials, acoustic signal processing, computational and numerical acoustics, hearing, audiology and psychoacoustics, speech, musical acoustics, electroacoustics, auditory quality of systems. It reports on original scientific research in acoustics and on engineering applications. The journal considers scientific papers, technical and applied papers, book reviews, short communications, doctoral thesis abstracts, etc. In irregular intervals also special issues and review articles are published.