Recent studies have shown the possibility to manipulate small elastic spheres in 3D with a single-sided beam. Acoustical tweezers are very appealing because they provide fine spatial control of motion single particle space. Their main limitations due weak restoring axial force and improving this is still challenge. We show theoretically that spherical vortex beams can trap large particles enhan...

The aim of the study was to assess the effect of short-term perceptual training of music on some psycho-acoustical measures. The study was carried out in three phases. In first the phase pre-training evaluation was done which included raga identification and various psycho acoustical tests. Psycho-acoustical tests included measurement of differential limen of frequency and intensity, duration d...

Far-field acoustical holography methods reconstruct the sound fields mainly based on the simple point source model because of the loss of abundant information compared with near-field acoustical holography (NAH). It brings problems that the reconstructed sound sources are different from the actual measured sound sources especially because of the evanescent waves which attenuate rapidly in the n...

Acoustical-based imaging techniques have found merit in determining the behavior of vibrating structures. These techniques are commonly used in numerous applications to obtain detailed noise source information and energy distributions on source surfaces. Source reconstructions using near-field acoustical holography NAH are reliant upon accurate measurement of the pressure field at the hologram ...

Sound-field imaging, the visualization of spatial and temporal distribution of acoustical properties such as sound pressure, is useful for understanding acoustical phenomena. This study investigated the use of parallel phase-shifting interferometry (PPSI) with a high-speed polarization camera for imaging a sound field, particularly high-speed imaging of propagating sound waves. The experimental...

In underwater environment the acoustical wave can transmit a long ranges away from the transmitter than the electromagnetic wave does. So far, the piezoelectric ceramic is still the best candidate as acoustical telemetry transmitters in underwater applications. The impedance matching on the interface between electro-acoustical transducer and electrical transmitter has been the most important su...

Children are considered at higher risk for harmful noise effects due to their sensitive development phase. Here, we investigated the of nocturnal aircraft exposure on short-term annoyance assessed in morning 51 primary school children (8–10 years) living surrounding community Cologne-Bonn Airport. Child-appropriate assessments and associated non-acoustical variables were surveyed. Nocturnal was...

The influence of listener's expertise and sound identification on the categorization of environmental sounds is reported in three studies. In Study 1, the causal uncertainty of 96 sounds was measured by counting the different causes described by 29 participants. In Study 2, 15 experts and 15 nonexperts classified a selection of 60 sounds and indicated the similarities they used. In Study 3, 38 ...

Noise annoyance is a feeling of displeasure or disturbance caused by noise. It is a sensitive indicator of adverse noise effects. Noise annoyance can only be partially explained by acoustical characteristics of noise – its level, frequency, duration, source etc. Non-acoustical factors, such as personal characterisitcs (age, gender, noise sensitivity), and social, residential or environmental fa...

This paper describes a first step towards the automatic classification of prominence (as defined by naive listeners). As a result of a listening experiment each word in 500 sentences was marked with a rating scale between ‘0’ (non-prominent) and ‘10’ (very prominent). These prominence labels are compared with the following acoustical features: loudness of each vowel, and F0 range and duration o...