Pye, J. D.: Synthesizing the waveforms of bat's pulses. In: Animal sonar systems, vol. I., ed. by R. G. Busnel, p. 43–65. Jouy-en-Josas: Laboratoire de Physiologie acoustique 1967. Google Scholar Pye, J. D., Flinn, M., Pye, A.: Correlated orientation sounds and ear moveme...
was between 72 and 77 kHz, the bats shifted the frequency of the CF component of their own echolocation sounds toward that of the artificial pulse, tracking the frequency of the artificial CF component.Bats flying within a large laboratory flight cage were also presented with artificial pulses. ...
Here the changes in pressure induce changes in vessel diameter because as the heartbeat generates pressure pulses that urges the blood 32 through the vessel, the vessel walls 34 momentarily bulge outwards and compress the air filled alveoli, alveolar sacs, etc. 35 that surround them. The Doppler...
for example 6. Requiring a selected plurality of pulses within a time period substantially reduces false alarms resulting from noise or other sources. False alarms are further reduced by requiring that the selected number of pulses be generated by both the inner receiver 26 and outer receiver 28....
The PW Doppler shift of every point in the region of interest (ROI) can be measured simultaneously from a single ensemble of transmitted pulses by emitting a plane wave that insonifies the entire field of the ROI. Large receive apertures and the coherent compounding technique can improve ...
In an industrial application, ultrasonic doppler measurement works best if the sound is sent into the liquid at an angle other than 90°. The particles or bubbles in the liquid need to be moving toward or away from the device for it to accurately measure the speed. A full pipe is needed...
The times to loss of esophageal doppler sounds and loss of aortic fluctuations were not significantly different. However, they were significantly longer than the time to loss of femoral pulses (P < 0.02).The canine asphyxial EMD model can be used for short experimental studies of pseudo-EMD. ...
20. The method of claim 17, wherein the scanning pulses are wide beams. 21. The method of claim 17, wherein the ultrasonic echoes are received by using a multi-beam technology. 22. A system for simultaneously displaying a B-mode image, a Doppler image, and a color blood flow image...