Attenuation technique for measuring sediment displacement levels

A Simple Technique for Measuring Axial Displacement in Stretched-Wire Alignment Systems

A method is described for determining axial displacement along a stretched wire by driving both ends of a resistive wire as a bi-directional voltage divider and measuring the local signal balance with a capacitive pickup. Such a system has been constructed, and test results are presented, along with the details of the electronics and apparatus, plus a description of the intended application of ...

A technique for measuring velocity and attenuation of ultrasound in liquid foams.

We describe an experimental setup specifically designed for measuring the ultrasonic transmission through liquid foams, over a broad range of frequencies (60-600kHz). The question of determining the ultrasonic properties of the foam (density, phase velocity and attenuation) from the transmission measurements is addressed. An inversion method is proposed, tested on synthetic data, and applied to...

Preferred Methods for Measuring Hearing Protector Attenuation

There are numerous well-documented measurement methods available to evaluate hearing protector attenuation, however, some are flawed or difficult to implement and some can and have been misused with the erroneous results fostering misleading conclusions. This paper will examine the three most robust methods including the “gold standard” in hearing protector attenuation measurements, namely real...

Sediment Issue Measuring Contaminant Resuspension Resulting from Sediment Capping

Experimental induction of left abomasal displacement: a new educational technique

The purpose of this study was to induce abomasal displacement to the left, and to let the undergraduate and post graduate students get used to the ping sounds of abomasum and other clinical manifestations. The procedure was carried out on eight young bulls, they were sedated and a 2 m flexible tube was inserted through the nasal canal into the rumen. By laparo-rumenotomy, 20 cm of the tube was ...