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Breathing is an involuntary action by the human body, and irregularities in breathing suggests possible respiratory disorders. Respiratory rate is an important parameter for breath sound analysis, and many papers have been published on how respiratory rate can be measured accurately and non-invasively. However, relatively fewer papers deal with breath sound based respiratory rate estimation. This...
The location estimation of sensor nodes is a fundamental and essential issue for wireless sensor networks (WSNs), because the gathered data is meaningful only when the location information of the sensor nodes is known. In this paper, we proposed a novel localization algorithm. In the proposed scheme, we first estimate the location of sensor nodes using Convex Position Estimation (CPE), and then refine...
This paper presents an alternative approach for heart rate measurement. Instead of using an ECG sensor, the proposed design uses sound signals received from a microphone which does not require skin-contact. Specifically, the design uses an air conductive microphone and an efficient algorithm to estimate the heart beat parameters of the wearer. The estimates are obtained for different activities undertaken...
Localization is an important problem in wireless sensor networks (WSNs), since location information is widely requested in various location-dependent applications. As one of the range-free localization algorithm DV-Hop, a well known localization algorithm, can be simply implement in real WSNs. To improve the accuracy of localization, this paper proposes an improved DV-Hop algorithm. The proposed algorithm...
This paper presents a wheeze detection method that uses a distributed array of microphones and can be implemented as part of a wearable health monitoring system. In order to reduce the power consumption for the wearable system, the method has been developed to operate at a sampling rate of 1000 Hz, instead of 8000 Hz. In the design, we use two regular air conductive microphones and a bone conductive...
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