Ernesto Accolti

• Doctor of Engineering
• Researcher and Lecturer at National Scientific and Technical Research Council

This article presents an interactive system for stage acoustics experimentation including considerations for hearing one's own and others' instruments. The quality of real-time auralization systems for psychophysical experiments on music performance depends on the system's calibration and latency, among other factors (e.g. visuals, simulation metho...

p>Analysis of sound source directivity uncertainty for room acoustics simulations and auralizations. </p

p>Analysis of sound source directivity uncertainty for room acoustics simulations and auralizations. </p

Simulationsand auralization methods in the field of room acoustics require the directivity of sound sources in third-octave frequency bands, which simplifies the calculation algorithms but introduces uncertainty. However, this uncertainty is not well known. A better understanding of the uncertainty is relevant because it can lead to improved accura...

p>Analysis of sound source directivity uncertainty for room acoustics simulations and auralizations. </p

p>Analysis of sound source directivity uncertainty for room acoustics simulations and auralizations. </p

The sound strength parameter G is one of the most important objective parameters related to the acoustical quality of concert halls, opera houses, and chamber music halls. G at mid frequencies is highly correlated with the acoustic quality reported by music conductors and subjects with musical training. Measuring this parameter requires a calibrate...

How is an acoustically diffuse field defined? To what extent are valid the equations of diffuse field theory? These are the questions addressed in this presentation. The answers are explained through more general theories, in turn explained with figures instead of formulae. The starting point is the idealization of diffuse sound field, from where t...

Noise annoyance and other effects of noise are reasonably correlated with A-weighted sound levels. Currently, the influence of low-frequency content and of sound emergence level (i.e. the sound level difference between total noise and residual noise) on effects of noise are being assessed in laboratories using stimuli based on recordings. Standards...

How is an acoustically diffuse field defined? To what extent are the equations of diffuse field theory valid? These are the questions addressed in this presentation. The answers are explained through more general theories, in turn explained with figures. The starting point is the idealization of diffuse sound field, from where the basic calculation...

The increase of installed capacity in the last ten years in Argentina above the capacity of generation, determines it as an energy dependent country. The mitigation of the environmental, social and economic consequences for the future is based on lower energy consumption in the building sector (see (EnBop, 2008); (Decree 140, SEN, 2007); (PRONURE,...

Entropy has become important as a phenomenon of contemporaneity in art practice and theory. Since the composer Karlheinz Stockhausen stated the problem in his essay Structure and Experiential Time (1955), several authors focused their studies on the influence of the rate of auditory information in the perception of elapsed time. In this article the...

The Auditorio Juan Victoria is a concert hall located in the homonym cultural building inaugurated in 1970, in San Juan province, Argentina. It seats 976 on an audience area of rectangular plant. The scenario is fan shaped and has the capacity for 80 seated musicians and 90 choristers standing. Hall dimensions are of about 22 m width, 40 m length a...

Halls for music performance frequently require the design of acoustic reflectors to redirect the sound waves toward the audience. In order to get adequate reflecting properties the usual criterion is that the surface density be no less than 20 kg/m2. However, this may prove too heavy in certain cases, so other possible solutions must be studied. In...

Audio recordings are often used to improve ecological validity of stimuli for laboratory research on effects of noise. In this paper a method is proposed for composing realistic environmental sound stimuli with (1) specified overall spectrum and (2) specified statistical distribution of sound event durations and semantic categories. The combination...

Exposure-response relationships have been widely studied using A weighted equivalent sound pressure level measured outside building environments in contrast with field surveys. On one hand low frequencies are minimized by A-weighted filter network. On the other hand low frequencies are predominant even inside buildings for some of the most salient...

While a huge amount of literature has been devoted to the study of traffic noise, its aural simulation has received much less attention. Such simulation enables the determination of the sound both outside and inside buildings by means of proper filters. In recent years, a technique based on sound recording of each isolated vehicle in a fixed statio...

There is concern about the occupational sound exposure of people working at call centers. There are two standard methods to measure sound immission from headsets. The first one, known as microphone in real ear (MIRE) uses a tiny microphone or probe inside the ear canal. The second uses an artificial ear or head with microphones at the bottom of the...

The perception and the human valuation of environmental noise do not only depend on the energy descriptors even if they are improved to take into account effects such as low frequency, tonality or impulsiveness effects. Both, the semantic content of the signals that compose the environmental noise and the interaction of these signals are related to...

Signal acquisition in acoustical metrology is an increasing need in research and fieldwork. Many specialists think that new indicators should be introduced to describe effects of noise arising from features such as spectrum, semantic content and psychoacoustic properties of noise, all of which require a knowledge of the time history of signal. Whil...

A research paradigm for the perception, effects in the human being and assessment of environmental noise is described. It is based on the analysis of several kinds of sounds that compose such environmental noise. The proposed paradigm studies instantaneous psychoacoustic parameters of each sound that composes environmental noise and its relationshi...