The dynamic responses of pile–liquefied composite soils are complex, and the bearing capacities single piles or pile groups in liquefiable remain unclear. For friction piles, resistance determines vertical capacity pile. In a pile–soil system, it is very important to study changes during vibration. Based on shaking table test, this investigated foundation–liquefied soil system under simulated h...

This paper presents an ongoing project for augmenting acoustic instruments with active acoustics. Active acoustics are defined as audio-rate vibration driven into the instruments physical structure, inducing air-borne sound output. The instrument’s acoustic sound is thus doubled by an electronic soundscape radiating from the same source. The article is centered on a case study on two guitars, o...

An analytical model is developed for examining the vibro-acoustic properties of a fluid-loaded plate reinforced by periodic ribs of finite width. This model is used to understand the frequency filtering properties of the flexural wave and the structural-borne sound wave of the ribbed plate under different fluid loading conditions. The relationships between the flexural waves and the related sou...

This research investigates a supporting structure with smart struts under crude vibration, in the aspect of their modeling and analysis. Particularly, in case of most rotorcrafts, structure-borne noise and vibration transmitted from the gearbox contains multiple spectral elements and higher frequencies, which include gear mesh frequencies and their side bands. In order to manage this issue, man...

The middle ear plays an essential role in sound perception: it conducts air-borne sound energy from the external environment into liquid waves inside the inner ear via ossicular vibrations. However, the middle ear is often the site of infections, congenital disorders and other pathologies, which can lead to conductive hearing loss. Tympanometry is an acoustic method to evaluate middle ear funct...

Although the shortening of smooth muscle at physiological lengths is dominated by an interaction between external forces (loads) and internal forces, at very short lengths, internal forces appear to dominate the mechanical behavior of the active tissue. We tested the hypothesis that, under conditions of extreme shortening and low external force, the mechanical behavior of isolated canine trache...

For decades, urban noise and vibration studies were mostly concerned with road traffic and trains. Tramway noise was rarely studied. Since the introduction of new types of tramways in the city of Graz strong complaints were brought up by local residents in certain areas. Typically, the annoyance by tramways results from a complex combination of sounds and vibration exposure depending on ground ...

Abstract The development of subways in cities has provided great comfort to the citizens, but it brought adverse effects residents buildings adjacent subway lines. main are Structure Borne Noise (SBN) and Vibration (SBV), which identified as environmental challenges. In this research, extent seriousness SBV SBN annoyances people were investigated. This is made two steps; first a thorough field ...