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This study presented a Leap Motion somatosensory controlled switches. The switches were implemented by the relays. The “open” or “short” of the switching circuit were controlled by the sensing of the Leap Motion somatosensory module. The virtual switches on the screen have designed to be 5 circle buttons. When the sensing hand touched the circle buttons virtually, the programming language “Processing”...
The sound of the siren of the ambulance is for the safety of the road transportation, but interferes the auscultation of the lung and heart sounds. The system implementation is included by (1) ACER Aspire 17 notebook as a server in right side; (2) HwaWei Amazing A6 smart mobile as a hot point in the middle; and (3) ACER Aspire 5 notebook as a client which the settings include IP address of host computer,...
This study presented the application of the adaptive filter to reduce the interference of the sound of sirens (audible warnings) of the ambulance. The auscultation of respiration on the ambulance is usually different from that in clinic room. The environmental noise is much larger on the ambulance, especially, the sound from audible warnings. However, this study simulated the filtering effects of...
This study employed the correlation coefficients analysis of time sequence, spectrogram, and auto-regression model of signals which were the lung sounds of subject end, and distant end where the sound was transmitted by mobile-to-mobile communication. The results presented that the correlation coefficients of time sequence, spectrogram, 4-order coefficients of auto-regression model were 0.36, 0.69,...
This study presented to insert a small-scaled microphone of the ear-set of a smart mobile (Galaxy Beam, GT-I8530, SamsungTM) into an eartip of the stethoscope, the sound can be transmitted by the mobile when it dialed to another phone or mobile. In this study, we employed another smart phone (Windows Phone 8X, hTC TM) to be the receiver. The results were showed by time sequence signals as well as...
This study presented a theoretical analysis to prove that there exists an optimal sampling frequency to reduce the noise in the signal to reduce the processes of acoustic digital signal processing. The respiration sounds have been recorded by 2 to 44.1 KHz or higher sampling rates, however, the optimal frequency might be decided by the noise from environment. This study solves the problem from the...
This study presented to insert a small-scaled microphone of the ear-set of a smart mobile (Amazing A6, Taiwan MobileTM) into an eartip of the stethoscope, the sound can be transmitted by the mobile when it dialed to another phone or mobile. In this study, we employed another smart phone (Galaxy R GT19103, SamsungTM) to be the receiver. The results were showed by spectrogram which demonstrated the...
This study presented a theoretical analysis to prove that there exists an optimal sampling frequency to reduce the noise in the signal to reduce the processes of acoustic digital signal processing. The respiration sounds have been recorded by 2 to 44.1 KHz or higher sampling rates, however, the optimal frequency might be decided by the noise from environment. This study solves the problem from the...
The simple first and second order low pass filter were employed to verify the effect on the reducing the sampling rate of the respiration sound. This study presented a theoretical analysis to prove that there exists an optimal sampling frequency to reduce the noise in the signal to reduce the processes of acoustic digital signal processing. The respiration sounds have been recorded by 2 to 44.1 KHz...
This study attempts to detect wheeze with k-means clustering algorithm. The subjects which included normal and wheeze sounds were evaluated. The algorithm presented a good performance to filter out noise and segment wheeze episode regions in the spectrograms. The results show that the clustering algorithm improved the signal-to-noise-ratio (SNR) from 29.02 ± 8.65 to 30.49 ± 9.01 dB in the cases of...
An algorithm of standard deviation based weighted average function (SDWAF) for reducing tremor disturbance was developed, and simulated to test the performance. The minus sign of modified rate meant the SDWAF reduced the tremor disturbance on the movement of powered wheelchair. The average modified rates were -21.93%, +11.68%, -12.85%, and, -18.30% in (a) with the tremor noise of 50 (the maximum value...
The purpose of this study is to develop a M3S-based GPS navigation system for power wheelchair. The wheelchair steered with GPS and electronic compass can move automatically toward a specific destination through a GIS-Map in the computer. The topic of this study is to help people with disabilities regain independence of transportation in specific areas of their daily activities. This system is now...
The purpose of the study is to develop a power wheelchair controller with safe security. This system is constructed with 2 modules: a main system and a sensors module.
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