The use of conventional metrics to quantify the perception of nonlinearly propagated noise has been studied. Gaussian noise waveforms have been numerically propagated both linearly and nonlinearly, and from the resulting waveforms, several metrics are calculated. These metrics are overall, A-, C-, and D-weighted sound pressure levels, perceived noise level, Stevens Mark VII perceived loudness, ...

A single compartment model of the arterial circulation was used to generate an arterial blood pressure waveform from pre-determined stroke volume (SV) and arterial resistance (R). With fixed stroke volume and varying resistances blood pressure waveforms showed mean values proportional to resistance but amplitude lessening with higher pressure; the amplitude of the hypothetical volume waveform o...

Exercise markedly influences pulse wave morphology, but the mechanism is unknown. We investigated whether effects of exercise on the arterial pulse result from alterations in stroke volume or pulse wave velocity (PWV)/large artery stiffness or reduction of pressure wave reflection. Healthy subjects (n = 25) performed bicycle ergometry. with workload increasing from 25 to 150 W for 12 min. Digit...

Caution Using Brachial Systolic Pressure to Calibrate Radial Tonometric Pressure Waveforms: Lessons From Invasive Study To the Editor: We were very interested to read the recent article by Segers et al1 that prompted the correspondence from O’Rourke and Takazawa,2 who were concerned about the reliability of brachial artery tonometry and the lack of relevant invasive data, as well as the subsequ...

26 We hypothesized that demographic/anthropometric parameters can be used to estimate effective 27 reflecting distance (EfRD), required to derive aortic pulse wave velocity (APWV), a prognostic 28 marker of cardiovascular risk, from peripheral waveforms and that such estimates can 29 discriminate differences in APWV and EfRD with aging and habitual endurance exercise in 30 healthy adults. Ascen...

We hypothesized that demographic/anthropometric parameters can be used to estimate effective reflecting distance (EfRD), required to derive aortic pulse wave velocity (APWV), a prognostic marker of cardiovascular risk, from peripheral waveforms and that such estimates can discriminate differences in APWV and EfRD with aging and habitual endurance exercise in healthy adults. Ascending aortic pre...

Intrinsic frequencies (IFs) derived from arterial waveforms are associated with cardiovascular performance, aging, and prevalent disease (CVD). However, prognostic value of these novel measures is unknown. We hypothesized that IFs incident CVD risk. Our sample was drawn the Framingham Heart Study Original, Offspring, Third Generation Cohorts included participants free at baseline (N=4700; mean ...

Abstract Acoustic logging while drilling (LWD), characterised by simultaneous and logging, is widely used to obtain the elastic parameters of formation around borehole. Most published monopole acoustic LWD simulation waveforms are routinely presented as pressure. However, these pressure disagree with voltage recorded in experiments. Here, find out reason inconsistent two waveforms, both piezoel...