STUDY OBJECTIVES To quantify the snoring sound intensity levels generated by individuals during polysomnographic testing and to examine the relationships between acoustic, polysomnographic, and clinical variables. DESIGN The prospective acquisition of acoustic and polysomnographic data with a retrospective medical chart review. SETTING A sleep laboratory at a primary care hospital. PARTIC...

In this study, the effect of ultrasound irradiation on the flux recovery and fouling mitigation for the membranes made of the polysulfone by the phase inversion method were investigated. Two ultrasound irradiation regimes, including inside and outside the module, were chosen for this study. The experiments were conducted to investigate the effect of ultrasound irradiation on the membrane struct...

This study investigated how acoustic cues signal the different syntactic structures of ambiguous sentences in language production. Acoustic cues such as intensity, f0, pause and duration vary according to different syntactic boundaries. Intensity of post-boundary syllable, f0 reset range of syllables around the corresponding target boundary, pause, and final lengthening of preboundary syllable ...

We report on recent experiments investigating the modification of the interband optical response of a piezoelectric semiconductor quantum well structure under the influence of intense short period surface acoustic waves. Experimentally, we study the photoluminescence (PL) of an undoped strained InGaAs/GaAs quantum well on which surface acoustic waves are propagated in the GHz regime. We observe...

A common measure for near-field acoustic energy of a vibrating structure is the acoustic intensity, which usually has positive and negative values that correspond to energy sources and sinks on the surface of the radiating structure. Sound from source and sink areas partially cancel each other and only a fraction of the near-field acoustic energy reaches the far-field. In this paper, an alterna...

OBJECTIVES This study investigated whether there were differences in the acoustic measures of fundamental frequency (Fo), jitter, intensity, and shimmer of older amateur singers and nonsingers and whether there were significant correlations between these acoustic measurements and listener judgments of speaker age. METHODS Acoustic measurements were obtained on 60 speaker participants from a s...

Condition monitoring of gear trains by classic techniques based on vibrations and/or extensometry measurements requires the preparation sensor contact surfaces and cables installation. In case planetary trains, this task is more difficult due to their compactness complexity relative movements among different elements. As an alternative, authors studied possibility using acoustic for gear-set ch...