Rok 2016

• 3D Acoustic Field Intensity Probe Design and Measurements

  Publikacja

  • J. Kotus
  • A. Czyżewski
  • B. Kostek

  - Archives of Acoustics - Rok 2016

  The aim of this paper is two-fold. First, some basic notions on acoustic field intensity and its measurement are shortly recalled. Then, the equipment and the measurement procedure used in the sound intensity in the performed research study are described. The second goal is to present details of the design of the engineered 3D intensity probe, as well as the algorithms developed and applied for that purpose. Results of the intensity...

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• Can Historic Interiors with Large Cubature be Turned Acoustically Correct?

  Publikacja

  • T. Kamisiński
  • A. Kulowski
  • R. Kinasz

  - Archives of Acoustics - Rok 2016

  Historic interiors with large cubature, such as reception, theatrical, and concert halls, need to be renovated periodically if they are to be preserved as cultural heritage for future generations. In such cases it is necessary to maintain appropriate balance between requirements imposed by heritage conservation authorities office which are usually being given a higher priority, applicable safety regulations, and the comfort of...

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Rok 2018

• A study on of music features derived from audio recordings examples – a quantitative analysis

  Publikacja

  • A. Dorochowicz
  • B. Kostek

  - Archives of Acoustics - Rok 2018

  The paper presents a comparative study of music features derived from audio recordings, i.e. the same music pieces but representing different music genres, excerpts performed by different musicians, and songs performed by a musician, whose style evolved over time. Firstly, the origin and the background of the division of music genres were shortly presented. Then, several objective parameters of an audio signal were recalled that...

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Rok 2022

• About Unusual Diffraction and Thermal Self-Action of Magnetosonic Beam

  Publikacja

  • A. Perelomova

  - Archives of Acoustics - Rok 2022

  The dynamics of slightly diverging two-dimensional beams whose direction forms a constant angle θ with the equilibrium straight magnetic strength is considered. The approximate dispersion relations and corresponding links which specify hydrodynamic perturbations in confined beams are derived. The study is dedicated to the diffraction of a magnetosonic beam and nonlinear thermal self-action of a beam in a thermoconducting gaseous plasma....

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• Acoustic Hysteresis in Flows with Different Kinds of Relaxation and Attenuation

  Publikacja

  • A. Perelomova

  - Archives of Acoustics - Rok 2022

  Graphs in the thermodynamic plane acoustic pressure versus excess acoustic density representing acoustic hysteresis, are considered as indicators of relaxation processes, equilibrium parameters of a flow, and kinds of wave exciters. Some flows with deviation from adiabaticity are examined: the Newtonian flow of a thermocon- ducting gas, the flow of a gas with vibrational relaxation, the flow of liquid electrolyte with a chemical...

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Rok 2012

• Acoustic heating produced in the boundary layer

  Publikacja

  • A. Perelomova
  • W. Pelc-Garska

  - Archives of Acoustics - Rok 2012

  : Instantaneous acoustic heating of a viscous fluid flow in a boundary layer is the subject of investigation. The governing equation of acoustic heating is derived by means of a special linear combination of conservation equations in the differential form, which reduces all acoustic terms in the linear part of the final equation but preserves terms belonging to the thermal mode. The procedure of decomposition is valid in a weakly...

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Rok 2011

• Acoustic Heating Produced in the Thermoviscous Flow of a Shear-Thinning Fluid

  Publikacja

  • A. Perelomova

  - Archives of Acoustics - Rok 2011

  This study is devoted to the instantaneous acoustic heating of a shear-thinningfluid. Apparent viscosity of a shear-thinning fluid depends on the shear rate. Thatfeature distinguishes it from a viscous Newtonian fluid. The special linear combi-nation of conservation equations in the differential form makes it possible to derivedynamic equations governing both the sound and non-wave entropy mode inducedin the field of sound. These...

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• Application of Vector Sensors to Acoustic Surveillance of a Public Interior Space

  Publikacja

  • K. Łopatka
  • J. Kotus
  • A. Czyżewski

  - Archives of Acoustics - Rok 2011

  Przedstawiono metodę precyzyjnej detekcji i lokalizacji źródeł dźwięku w pomieszczeniach. Wykorzystano wektorowe czujniki akustyczne, dostarczające sygnałów ciśnienia akustycznego i prędkości cząsteczek powietrza. Zaprezentowano metodę lokalizacji źródeł dźwięku na widowni wydarzenia publicznego. Przedstawiono demonstracyjny system zainstalowany w sali wykładowej. System poddano ocenie dokładności na podstawie przeprowadzonych...

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• Comparison of various speech time-scale modificartion methods

  Publikacja

  • A. Kupryjanow
  • A. Czyżewski

  - Archives of Acoustics - Rok 2011

  The objective of this work is to investigate the influence of the different time-scale modification (TSM) methods on the quality of the speech stretched up using the designed non-uniform real-time speech time-scale modification algorithm (NU-RTSM). The algorithm provides a combination of the typical TSM algorithm with the vowels, consonants, stutter, transients and silence detectors. Based on the information about the content and...

Rok 2009

• Acoustic streaming caused by some types of aperiodic sound. Buildup of acoustic streaming

  Publikacja

  • A. Perelomova
  • P. Wojda

  - Archives of Acoustics - Rok 2009

  The analysis of streaming caused by aperiodic sound of different types (switched on at transducer sound or sound determined by initial conditions) is undertaken. The analysis bases on analytical governing equation for streaming Eulerian velocity, which is a result of decomposition of the hydrodynamic equations into acoustic and non-acoustic parts. Its driving force (of acoustic nature) represents a sum of two terms; one is the...

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Rok 2008

• Acoustic verification on onomatopoeic sets in contrastive approach

  Publikacja

  • K. Wojan

  - Archives of Acoustics - Rok 2008

• Automatic detection and correction of detuned singing system for use with query-by-humming applications

  Publikacja

  • M. Lech

  - Archives of Acoustics - Rok 2008

  The aim of the paper is to present an idea of using the automatic detection and correction of detuned singing as a subsystem in query-by-humming (QBH) applications. The common approach to searching for a requested song basing on the melody retrieved from hummed pattern usually employs the so-called Parsons code or melody contour. In such a case information about sound pitch is discarded. It was thought out that an additional module...

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• Automatic singing quality recognition employing artificial neural networks

  Publikacja

  • P. Żwan

  - Archives of Acoustics - Rok 2008

  Celem artykułu jest udowodnienie możliwości automatycznej oceny jakości technicznej głosów śpiewaczych. Pokrótce zaprezentowano w nim stworzoną bazę danych głosów śpiewaczych oraz zaimplementowane parametry. Przy pomocy sztucznych sieci neuronowych zaprojektowano system decyzyjny, który oceniono w pięciostopniowej skali jakość techniczną głosu. Przy pomocy metod statystycznych udowodniono, że wyniki generowane przez ten system...

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Rok 2007

• Applying computational intelligence to acoustics.

  Publikacja

  • B. Kostek

  - Archives of Acoustics - Rok 2007

  W artykule przedstawiono przegląd wybranych zagadnień związanych z zastosowaniem metod inteligencji obliczeniowej w akustyce. Zaprezentowane metody obejmują m.in. sztuczne sieci neuronowe, zbiory przyblizone, logikę rozmytą, algorytmy genetyczne. Problematyka akustyczna dotyczy z kolei klasyfikacji dźwięków muzycznych, inteligentnego przetwarzania muzyki, inteligentnego sterowania trakturą organową oraz obiektywizacji metody oceny...

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Rok 2019

• Assessment of the Effectiveness of a Short-term Hearing Aid Use in Patients with Different Degrees of Hearing Loss

  Publikacja

  • T. Poremski
  • P. Szymański
  • B. Kostek

  - Archives of Acoustics - Rok 2019

  The study presents evaluating the effectiveness of the hearing aid fitting process in the short-term use (7 days). The evaluation method consists of a survey based on the APHAB (Abbreviated Profile of Hearing Aid Benefit) questionnaire. Additional criteria such as a degree of hearing loss, number of hours and days of hearing aid use as well as the user’s experience were also taken into consideration. The outcomes of the benefit...

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• Comparison of Lithuanian and Polish Consonant Phonemes Based on Acoustic Analysis – Preliminary Results

  Publikacja

  • G. Korvel
  • O. Kurasova
  • B. Kostek

  - Archives of Acoustics - Rok 2019

  The goal of this research is to find a set of acoustic parameters that are related to differences between Polish and Lithuanian language consonants. In order to identify these differences, an acoustic analysis is performed, and the phoneme sounds are described as the vectors of acoustic parameters. Parameters known from the speech domain as well as those from the music information retrieval area are employed. These parameters are...

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Rok 2014

• Auditory Display Applied to Research in Music and Acoustics . Obrazowanie dźwiękowe w muzyce i akustyce.

  Publikacja

  • B. Kostek

  - Archives of Acoustics - Rok 2014

  This paper presents a relationship between Auditory Display (AD) and the domains of music and acoustics. First, some basic notions of the Auditory Display area are shortly outlined. Then, the research trends and system solutions within the fields of music technology, music information retrieval and music recommendation and acoustics that are within the scope of AD are discussed. Finally, an example of AD solution based on gaze...

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• Classification of Music Genres Based on Music Separation into Harmonic and Drum Components . Klasyfikacja gatunków muzycznych wykorzystująca separację instrumentów muzycznych

  Publikacja

  • A. Rosner
  • B. Schuller
  • B. Kostek

  - Archives of Acoustics - Rok 2014

  This article presents a study on music genre classification based on music separation into harmonic and drum components. For this purpose, audio signal separation is executed to extend the overall vector of parameters by new descriptors extracted from harmonic and/or drum music content. The study is performed using the ISMIS database of music files represented by vectors of parameters containing music features. The Support Vector...

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Rok 2006

• Confronting representative spectral structures of vocal tract pulse responses

  Publikacja

  • Z. Wojan
  • W. Lis
  • K. Wojan

  - Archives of Acoustics - Rok 2006

  Artykuł niniejszy jest kolejnym w cyklu prac publikowanych na łamach Materiałów OSA, które poświęcono problemowi klasyfikacji formalnej leksemów odmiennych języków.W pracy omówiono metody i rezultaty automatycznego kwalifikowania wybranych leksemów trzech systemów języka na podstawie konfrontowania ich cyfrowych reprezantacji.

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• Confronting representative spectral structures of vocal tract pulse responses

  Publikacja

  • K. Wojan

  - Archives of Acoustics - Rok 2006