Search results for: SEKTOR%20NAFTOWY

• e-mentor

  Journals

  ISSN: 1731-6758 , eISSN: 1731-7428

• Trzeci Sektor

  Journals

  ISSN: 1733-2265

• Detection of Water on Road Surface with Acoustic Vector Sensor

  Publication

  • J. Kotus
  • G. Szwoch

  - SENSORS - Year 2023

  This paper presents a new approach to detecting the presence of water on a road surface, employing an acoustic vector sensor. The proposed method is based on sound intensity analysis in the frequency domain. Acoustic events, representing road vehicles, are detected in the sound intensity signals. The direction of the incoming sound is calculated for the individual spectral components of the intensity signal, and the components...

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• Determination of the Vehicles Speed Using Acoustic Vector Sensor

  Publication

  • J. Kotus

  - Year 2018

  The method for determining the speed of vehicles using acoustic vector sensor and sound intensity measurement technique was presented in the paper. First, the theoretical basis of the proposed method was explained. Next, the details of the developed algorithm of sound intensity processing both in time domain and in frequency domain were described. Optimization process of the method was also presented. Finally, the proposed measurement...

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• Localization of sound sources with dual acoustic vector sensor

  Publication

  • J. Kotus
  • G. Szwoch

  - Year 2019

  The aim of the work is to estimate the position of sound sources. The proposed method uses a setup of two acoustic vector sensors (AVS). The intersection of azimuth rays from each AVS should indicate the position of a source. In practice, the result of position estimation using this method is an area rather than a point. This is a result of inaccuracy of the individual sensors, but more importantly, of the influence of a source...

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• Calibration of acoustic vector sensor based on MEMS microphones for DOA estimation

  Publication

  • J. Kotus
  • G. Szwoch

  - APPLIED ACOUSTICS - Year 2018

  A procedure of calibration of a custom 3D acoustic vector sensor (AVS) for the purpose of direction of arrival (DoA) estimation, is presented and validated in the paper. AVS devices working on a p-p principle may be constructed from standard pressure sensors and a signal processing system. However, in order to ensure accurate DoA estimation, each sensor needs to be calibrated. The proposed algorithm divides the calibration process...

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• Public Sector Economics

  Journals

  eISSN: 2459-8860

• Multiple sound sources localization in real time using acoustic vector sensor

  Publication

  • J. Kotus

  - Communications in Computer and Information Science - Year 2012

  Method and preliminary results of multiple sound sources localization in real time using the acoustic vector sensor were presented in this study. Direction of arrival (DOA) for considered source was determined based on sound intensity method supported by Fourier analysis. Obtained spectrum components for considered signal allowed to determine the DOA value for the particular frequency independently. The accuracy of the developed...

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• Multiple sound sources localization in free field using acoustic vector sensor

  Publication

  • J. Kotus

  - MULTIMEDIA TOOLS AND APPLICATIONS - Year 2015

  Method and preliminary results of multiple sound sources localization in free field using the acoustic vector sensor were presented in this study. Direction of arrival (DOA) for considered source was determined based on sound intensity method supported by Fourier analysis. Obtained spectrum components for considered signal allowed to determine the DOA value for the particular frequency independently. The accuracy of the developed...

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• Sektor MSP we współczesnej gospodarce

  Publication

  • P. Dominiak

  - Year 2005

  Praca uwzględnia najnowszy dorobek teorii ekonomii, jak również badania nad sektorem MSP w krajach wysoko rozwiniętych prowadzone na przełomie XX i XXI wieków. Zawiera także analizy najnowszych dostępnych danych statystycznych z wielu krajów. Jest próbą odpowiedzi na szereg pytań takich jak np.: W czym przejawia się wpływ sektora MSP na wzrost gospodarczy?Czy znaczenie sektora MSP w wysoko rozwiniętych krajach nadal rośnie?Czy...