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Bowel sounds is an important physiological parameter of distinguishing the gastrointestinal motility dysfunction. Auscultation of bowel sounds provides a noninvasive way for clinical diagnosis, but it is also easily affected by environmental noise. In this study, a novel higher-order-statistics (HOS)-based fractal dimension algorithm was proposed for detecting noisy bowel sounds. By using the nature...
A fully integrated receiver front-end for very small aperture terminal (VSAT) applications in a 0.18-μm SiGe BiCMOS technology is demonstrated. To satisfy different specifications of various applications, the proposed receiver can down-convert the input signal in a wide RF range from 9.8 to 14.8 GHz to the IF frequency at L-band (950-2150MHz) with four differences LO frequencies. The noise figure...
Noise generated from wind flow over a two-way radio could jeopardize communication effectiveness. A pair of two-way radio was studied where a unit (a transmitter)was placed inside a wind tunnel and the other unit (a receiver)was placed inside the anechoic chamber in order to isolate it from external noise. A speaker was located at a distance near the transmitter to give an audio input to the radio...
This paper describes the wind induced noise measurement of a two-way radio inside a wind tunnel by measuring the sound pressure level transmitted to a receiver unit placed inside the anechoic chamber. Anechoic chamber was used to isolate receiver from other outside noise. The transmitted wind noise was delivered by the receiver unit speaker and measured using the microphone which measures the sound...
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