AN ACOUSTIC METHOD FOR MEASURING INFANT BODY VOLUME

A new gas dilution method for measuring body volume.

This study was designed to examine the validity of a new gas dilution method (GD) for measuring human body volume and to compare its accuracy with the results obtained by the underwater weighing method (UW). We measured the volume of plastic bottles and 16 subjects (including two females), aged 18-42 years with each method. For the bottles, the volume measured by hydrostatic weighing was correl...

An experimental method for measuring transfer functions of acoustic tubes

This work proposes an experimental method for direct measurement of transfer functions of acoustic tubes. The method obtains a pressure-to-velocity transfer function from measurement of input volume velocity and output pressures of a target tube. Steady sinusoidal waves from 100 Hz to 5 kHz with a 10-Hz increment were used as a source signal. Experimental results compared with transmission line...

Missed Pharyngeal Foreign Body in an Infant that Persisted for 50 days:A Rare Case

An Acoustic Sensor for Measuring Traffic Variables

The Intelligent Vehicle-Highway System (IVHS) program requires a large number of sensors to accurately measure traffic data. A novel passive acoustic sensing scheme based upon a triple-aperture microphone array is proposed as an inexpensive, reliable alternative to other sensors under consideration. A single sensor exhibits the potential for monitoring several lanes of traffic simultaneously. A...

A semiautomated method for measuring brain infarct volume.

An accurate, reproducible method for determining the infarct volumes of gray matter structures is presented for use with presently available image analysis systems. Areas of stained sections with optical densities above that of a threshold value are automatically recognized and measured. This eliminates the potential error and bias inherent in manually delineating infarcted regions. Moreover, t...