Source localization using the steered response power (SRP) usually requires a costly grid-search procedure. To address this issue, modified SRP algorithm was recently introduced, providing improved robustness when coarser spatial grids. In letter, an iterative method based on is presented. A coarse grid initially evaluated with SRP, selecting point highest accumulated value. Then, its corresponding volume iteratively decomposed by finer grid. Experiments have shown that provides almost same...

Some recent concert hall designs have incorporated coupled reverberation chambers to the main that stimulated a range of research activities in architectural acoustics. The coupling apertures between two or more coupled-volume systems are central importance for sound propagation and energy decays throughout systems. In addition, positions sources receivers relative aperture also profound influence on distributions decays. This work investigates effect size behavior using both acoustic...

Sound source localization using a two-microphone array is an active area of research, with considerable potential for use video conferencing, mobile devices, and robotics. Based on the observed time-differences arrival between sound signals, probability distribution location sources considered to estimate actual positions. However, these algorithms assume given number sources. This paper describes updated research account solution presented in Escolano et al. [J. Acoust. Am. Soc. 132(3),...

Lyotropic liquid crystals play an important role in many biological environments, such as micelles, liposomes, and phospholipid bilayers of cell membranes. In this work, we explore the performance lyotropic biosensors for macromolecules, proteins whole microorganisms hydrophilic media, i.e., natural media where these specimens exist. The aim is to detect specific targets employing simple, unpowered sensors that can be used field, with minimum additional equipment. A number different...

A theoretical approach to room acoustic simulations based on a radiative transfer model is developed by adapting the classical theory from optics acoustics. The proposed expands geometrical modeling algorithms incorporating propagation medium that absorbs and scatters radiation, handling both diffuse non-diffuse reflections boundaries objects in room. main scope of this provide proper foundation for wide number simulation models, order establish unify their principles. It shown technique...

Discrete-time domain methods provide a simple and flexible way to solve initial boundary value problems. With regard the sources in such methods, only monopoles or dipoles can be considered. However, many problems as room acoustics, radiation of realistic is directional-dependent their directivity patterns have clear influence on total sound field. In this letter, method synthesize proposed, especially cases where knowledge based discrete values diagram. Some examples been carried out order...

During the last 40 years, there has been an increasing interest on performing room acoustic simulations for several purposes; among them, to get a lower sound level, reduce propagation between rooms, increase speech intelligibility and adjust reverberance. However, is no universal method able deal with every kind of scenario. Recently, based assumption that energy propagated in similar fashion heat transfer or particles gas proposed. This method, known as diffusion equation model,...

In recent years a model for predicting sound fields in enclosures has been proposed, based on the mathematical theory of diffusion. This is held to be valid late reverberation component impulse response, basis that sufficient reflection events must occur [Valeau et al., J. Acoust. Soc. Am. 119, 1504–1513 (2006)]. The present work determines numerically extent reflections necessary solution diffusion equation accurate quasi-cubic rooms. Some preliminary numerical experiments have carried out...

Block-based physical modeling algorithms for sound synthesis have gained more and interest in the past few years. They advantage that new models can be created by combining existing blocks they offer opportunity to combine different techniques. We propose a general approach creating how connect these assuring their correct interaction. Furthermore, we show implement interconnection of with wave digital filter principles. The complete procedure is applied example application scenario...

Different non-Fourier models of heat conduction have been considered in recent years, a growing area applications, to model microscale and ultrafast, transient, nonequilibrium responses mass transfer. In this work, using Fourier transforms, we obtain exact solutions for different lagging semi-infinite domain, which allow the construction analytic-numerical with prescribed accuracy. Examples numerical computations, comparing properties considered, are presented.

Bayesian model selection and parameter estimation are used to address the problem of choosing most concise filter order for a given application while simultaneously determining associated coefficients. This approach is validated against simulated data generate pole-zero representations head-related transfer functions.

The diffusion equation model was used for room acoustic simulations to predict the sound pressure level and reverberation time. technical literature states that method accurately models late portion of impulse response if energy is sufficiently scattered. This work provides conclusions on validity rooms with homogeneous dimensions in relation scattering coefficients boundaries. A systematic evaluation conducted out determine ranges absorption coefficient values result low noticeable...

Precision directivity in loudspeaker systems is a desired feature of many sound reinforcement applications. This also desirable antenna array but, opposition to systems, consolidated design theory has been widely considered over the past years. So, there are known methods achieve specific diagrams based on electromagnetic field interference. In this paper, synthesis linear acoustical arrays precise directional pattern by using standard theory. Starting pressure emitted single dynamic...