Acoustic Pulse Testing

effects of acoustic stimulation on biophysical profile testing time

biophysical profile (bpp) test is the most commonly used antenatal test of fetal well-being. purpose of this study is determining the influence of acoustic stimulation (as) on bpp testing time. about 55 pregnant women at 35 to 42 weeks who referred to department of obstetric & gynecology at university of medical sciences, tabriz, iran, were selected randomly. we used abdominal ultrasound guidan...

Acoustic Pulse Spreading in a Random Fractal

Acoustic pulse scattering by baffled membranes

Asymptotic expansions as e--,0 that are uniformly valid in t are obtained for the membrane's motion and the scattered acoustic pressure field. The small parameter ß is the density ratio of the acoustic fluid and the membrane. For simplicity of presentation, only plane, compact incident pulses are considered. The scattered field depends on the pulse's tructure. If it is a sufficiently narrow ban...

Pulse Testing Of Laser Diodes

L-I-V Testing Basic Light intensity-Current-Voltage (L-I-V) testing is an I-V test with the addition of optical power measurements. This test is primarily used to sort laser diodes or weed out bad devices before they become part of an assembly. The device under test (DUT) is subjected to a current sweep while the forward voltage drop is recorded for each step in the sweep. Simultaneously, instr...

Testing the fast pulse operation of SIS12

During this experiment the magnet power supplies have been operated in SIS12 mode, so that a maximal current of 2.3 kA for the main SIS dipole magnets at a magnetic rigidity of 12 Tm was feasible. It had been clarified that a continuous operation would be possible up to an electric power of 5 MW, while for higher power an asynchronous single shot mode had been foreseen. Both SIS RF-cavities wer...