원문정보
초록
영어
Portable devices for providing energy expenditure information have been developed in the area of u-healthcare environment. The body consumes energy not only by body activities but also by voices such as talking and singing, however, current devices calculate energy expenditure values based on body activities only. This study was performed to estimate energy consumption caused by voices using PVDF vibration sensor. Sensing module for acquiring voice transmitted through bone, placed on the sternum area, was fabricated in house. Twenty six subjects were participated for the experiment for data collection while reading book and singing with the use of respiratory gas analyzer. Also, body movement was acquired using 3-axis accelerometer while walking and running on the treadmill with the use of gas analyzer, too. Parameters extracted from the voice signal and accelerometer outputs were compared with the actual energy consumption obtained from gas analyzer for finding linear regression equation. R-square values of voice signal and body activity signal were found to be 0.669 and 0.691, respectively, and the regression equations were established accordingly.
목차
1. Introduction
2. Methods
2.1. Experimental Design
2.2. PVDF vibration sensor
2.3. Data Acquisition and Analysis
3. Results and Discussion
3.1. Voice signals
3.2. Activity signals
4. Conclusions
References