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Wyszukujesz frazę "Felcyn, Jan" wg kryterium: Autor

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    Wyświetlanie 1-5 z 5
    Tytuł:
    Road, Tram and Aircraft Traffic Noise Annoyance Related to the Number of Noise Events and the Equivalent Sound Level
    Autorzy:
    Felcyn, Jan
    Ptak, Patrycja
    Powiązania:
    https://bibliotekanauki.pl/articles/31339951.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    noise annoyance
    noise event
    transportation noise
    sound level
    Opis:
    Noise mapping is based on long-term noise indicators, such as LN or LDEN. On the other hand, transportation intensity changes during a day (road traffic peak hours) or a year (more flights during holidays) and this variability is not reflected in single sound level values. We wanted to find out whether not only sound level but also the number of noise events is the factor influencing noise annoyance assessment. Ambisonic recordings of real traffic in a city were used. Road, tramway, and aircraft traffic were investigated and two factors were manipulated: the equivalent sound level value and the number of noise events. All stimuli were presented in an anechoic chamber. The results showed that sound level is always a statistically significant parameter while the number of events has an impact only for tramways and airplanes. Moreover, the difference is observed only between one or more subgroups, no matter what the sound level value was. For road traffic this relation was not found to be statistically significant. It was also shown that the existence of tramway bonus or airplane malus is linked with the number of noise events.
    Źródło:
    Archives of Acoustics; 2022, 47, 4; 457-467
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Enhancing speech signals based on an mems microphone array and temporal differences in the incoming signal
    Autorzy:
    Felcyn, Jan
    Raszewski, Michał
    Powiązania:
    https://bibliotekanauki.pl/articles/2202430.pdf
    Data publikacji:
    2022
    Wydawca:
    Politechnika Poznańska. Instytut Mechaniki Stosowanej
    Tematy:
    microphone array
    speech enhancement
    direction of arrival
    signal processing
    macierz mikrofonów
    uzdatnianie mowy
    kierunek nadejścia sygnału
    przetwarzanie sygnałów
    Opis:
    The development of the Internet of things and automatisation in everyday life also influences our houses. There are more and more devices on the market which can be controlled remotely. One kind of such control involves the use of voice signals. This method tends to use microphone arrays and dedicated algorithms to enhance the speech signal and recognize the words in it. In this project, a small 5-microphone array was developed. To enhance the quality of the signal, dedicated software was written. It consists of several modules, including the direction of arrival estimation, denoising, and differentiation between adults and children. The results showed that the custom algorithm can increase the signal to noise ratio by up to 6 dB.
    Źródło:
    Vibrations in Physical Systems; 2022, 33, 2; art. no. 2022202
    0860-6897
    Pojawia się w:
    Vibrations in Physical Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of annoyance due to wind turbine noise based on pre-learned patterns
    Autorzy:
    Felcyn, Jan
    Preis, Anna
    Gogol, Robert
    Powiązania:
    https://bibliotekanauki.pl/articles/24201941.pdf
    Data publikacji:
    2022
    Wydawca:
    Politechnika Poznańska. Instytut Mechaniki Stosowanej
    Tematy:
    survey
    in-situ study
    laboratory experiment
    calibration procedure
    ankieta
    badanie in situ
    eksperyment laboratoryjny
    procedura kalibracji
    Opis:
    Annoyance due to wind turbine noise is usually assessed on the basis of surveys conducted among people living in the vicinity of turbines or in the laboratory conditions. Due to the fact that the latter are very different from natural conditions, we propose a solution to reduce this difference. Prior to the surveys, 50 participants were asked to familiarize themselves with 5 environmental signals. They were informed about the annoyance rating assigned to each signal (obtained earlier in laboratory conditions), expressed as a number between 0 (not annoying signal) and 10 (extremely annoying signal). Participants were then presented with new environmental sounds and asked to rate the annoyance caused by each sound, in accordance with the previously learned method. The analysis of our results shows that the variability of answers given by respondents at their homes is similar to those obtained earlier in laboratory conditions.
    Źródło:
    Vibrations in Physical Systems; 2022, 33, 3; art. no. 2022310
    0860-6897
    Pojawia się w:
    Vibrations in Physical Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Assessment of Audio-Visual Environmental Stimuli. Complementarity of Comfort and Discomfort Scales
    Autorzy:
    Felcyn, Jan
    Preis, Anna
    Praszkowski, Marcin
    Wrzosek, Małgorzata
    Powiązania:
    https://bibliotekanauki.pl/articles/1953463.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    audio-visual interaction
    environment assessment
    discomfort
    comfort
    environmental perception
    environmental quality
    Opis:
    The aim of the study was to examine how the wording of a question about audio, visual and audiovisual stimuli can affect the assessment of the environment. The participants of the psychophysical experiments were asked to rate, on a numerical scale, audio and visual information both separately and together, combined into mixes. A set of questions was used for all the investigated audio, visual, and audio-visual stimuli. The participants were asked about the comfort or the discomfort caused by the perceived stimuli presented at three different sound levels. The results show that there are no statistically significant differences between the assessment of comfort and discomfort associated with visual samples. Actually, the comfort and discomfort ratings are equivalent to the extent that a discomfort rating can be represented as the opposite to the comfort rating, i.e. the discomfort rating is equal to the 10 minus comfort rating. In general, the results obtained for audio and audio-visual samples were the same, with only a few exceptions that were dependent on sound level. No statistically significant differences were found for the loudest stimuli, but there were some exceptions for the softener cases. Based on the results, we show that only for visual stimuli both scales are totally interchangeable. When presenting audio and audio-visual samples, only one scale should be applied – either discomfort or comfort, depending on the context and the character of the stimuli.
    Źródło:
    Archives of Acoustics; 2021, 46, 2; 279-288
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Estimating the population exposed to transportation noise: a case study on Poznań City
    Autorzy:
    Preis, Anna
    Felcyn, Jan
    Kokowski, Piotr
    Gałuszka, Michał
    Libiszewski, Paweł
    Powiązania:
    https://bibliotekanauki.pl/articles/127868.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Poznańska. Instytut Mechaniki Stosowanej
    Tematy:
    ANNEX III
    number of people affected by noise
    Annex III
    narażenie na hałas
    Opis:
    European Union Directive 2002/49/EC relating to the assessment and management of environmental noise (named as END) in article 6 paragraph 3 states that “harmful effects may be assessed by means of dose-effect relations referred to in ANNEX III”. In this still unfinished ANNEX III there are formulas which present how to calculate the number of people affected by a given noise. The dose-effect relations have been recently presented in WHO document “Environmental Noise Guidelines for the European Region”. These Guidelines allow to predict the percentage of people who will be affected by a specific kind of noise. E.g. it is shown how to calculate the percentage of highly annoyed people for a given value of noise index, Lden. In our paper we propose how to calculate the total number of people affected by noise in their living conditions and discuss the implementation of methods recommended in ANNEX III in Poland.
    Źródło:
    Vibrations in Physical Systems; 2019, 30, 1; 1-8
    0860-6897
    Pojawia się w:
    Vibrations in Physical Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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