Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "annoyance" wg kryterium: Wszystkie pola

  Lista filtrów
Wyrównaj
    Wyświetlanie 1-15 z 15
    Tytuł:
    Proposed Methodology for the Annoyance Penalty of Amplitude Modulated Wind Turbine Noise
    Autorzy:
    Makarewicz, Rufin
    Powiązania:
    https://bibliotekanauki.pl/articles/2141682.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    annoyance
    wind turbine noise
    amplitude modulation.
    Opis:
    Amplitude modulation increases the annoyance caused by wind turbine noise. One gets the improved annoyance when a penalty is added to the measured or calculated time-average sound level. The amplitude modulated wind turbine noise consists of pulses. Each of them could be characterized by the short time-average sound level and the modulation depth. The latter determines the pulse penalty. This paper shows how to calculate the improved annoyance of amplitude modulated wind turbine noise, when the short time-average sound level and the penalty for each pulse are known. A special case of identical pulses is discussed. The proposed methodology needs to be tested by research.
    Źródło:
    Archives of Acoustics; 2022, 47, 1; 125-128
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Study of Annoyance Caused by Low-Frequency Noise During Mental Work
    Autorzy:
    Kaczmarska, A.
    Łuczak, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/89879.pdf
    Data publikacji:
    2007
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    low-frequency noise
    annoyance
    working environments
    Opis:
    This article presents the results of an analysis of annoyance caused by low-frequency noise (including infrasonic noise) that occurs at work stations located in offices. The tests covered measurements of acoustic parameters specific for this type of noise and a survey conducted in the working environment and in laboratory conditions at a model of a work station.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2007, 13, 2; 117-125
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Annoyance Related to Wind Turbine Noise
    Autorzy:
    Pawlaczyk-Łuszczyńska, M.
    Dudarewicz, A.
    Zaborowski, K.
    Zamojska-Daniszewska, M.
    Waszkowska, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/178067.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    wind turbines
    noise
    annoyance
    Opis:
    A questionnaire inquiry on response to wind turbine noise was carried out on 361 subjects living in the vicinity of 8 wind farms. Current mental health status of respondents was assessed using Goldberg General Health Questionnaire GHQ-12. For areas where respondents lived, A-weighted sound pressure levels (SPLs) were calculated as the sum of the contributions from the wind power plants in the specific area. Generally, 33.0% of respondents were annoyed outdoors by wind turbine noise at the calculated A-weighted SPL of 31–50 dB, while indoors the noise was annoying to 21.3% of them. The propor- tion of subjects evaluating the noise produced by operative wind turbines as annoying decreased with increasing the distance from the nearest wind turbine (27.6% at the distance of 400–800 m vs 14.3% at the distance above 800 m, p < 0.016). On the other hand, the higher was the noise level, the greater was the percentage of annoyed respondents (14.0% at SPL up to 40 dB vs 28.1% at SPL of 40–45 dB, p < 0.016). Besides noise and distance categories, subjective factors, such as general attitude to wind turbines, sensitivity to landscape littering and current mental health status, were found to have significant impact on the perceived annoyance. About 50% of variance in annoyance rating might be explained by the aforesaid subjective factors.
    Źródło:
    Archives of Acoustics; 2014, 39, 1; 89-102
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Psychoacoustic metrics in the psychological diagnosis of noise annoyance
    Autorzy:
    Radosz, Jan
    Powiązania:
    https://bibliotekanauki.pl/articles/24201989.pdf
    Data publikacji:
    2023
    Wydawca:
    Politechnika Poznańska. Instytut Mechaniki Stosowanej
    Tematy:
    noise
    annoyance
    workplace
    sound
    office
    psychoacoustics
    hałas
    uciążliwość
    miejsce pracy
    dźwięk
    biuro
    psychoakustyka
    Opis:
    Aim of the study was to asses noise annoyance in relation to psychoacoustic metrics of sound in an office environment. The Vienna Test System was used for this purpose. Virtual office acoustic environments were developed with sources of different psychoacoustic parameters (loudness, sharpness, fluctuation strength, roughness) but with a constant A-weighted sound pressure level of 55 dB - sound environment with conversations, sound environment with office equipment (computers, printers, telephones) and sound environment with all office noise sources together. The reference environment was a quiet office room with no additional noise sources. Recorded real noise sources were transferred to a virtual 3D sound environment and converted into binaural sound, which was then played back on headphones. During the exposure to each of the acoustic environments, the subjects performed the ALS test (work performance series) and COG test (measurement of attention and concentration) and then assessed the given environment using a questionnaire. The paper presents the results of the statistical analysis - despite different psychoacoustic metrics of office noise sources in the examined acoustic environments, no statistically significant differences were observed in the results of psychological tests.
    Źródło:
    Vibrations in Physical Systems; 2023, 34, 1; art. no. 2023101
    0860-6897
    Pojawia się w:
    Vibrations in Physical Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of annoyance from the wind turbine noise: A pilot study
    Autorzy:
    Pawlaczyk-Łuszczyńska, Małgorzata
    Dudarewicz, Adam
    Zaborowski, Kamil
    Zamojska-Daniszewska, Małgorzata
    Waszkowska, Małgorzata
    Powiązania:
    https://bibliotekanauki.pl/articles/2178846.pdf
    Data publikacji:
    2014-06-21
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    wind turbines
    noise
    health effects
    annoyance
    Opis:
    Objectives: The overall aim of this study was to evaluate the perception of and annoyance due to the noise from wind turbines in populated areas of Poland. Material and Methods: The study group comprised 156 subjects. All subjects were asked to fill in a questionnaire developed to enable evaluation of their living conditions, including prevalence of annoyance due to the noise from wind turbines and the self-assessment of physical health and well-being. In addition, current mental health status of the respondents was assessed using Goldberg General Health Questionnaire GHQ-12. For areas where the respondents lived, A-weighted sound pressure levels (SPLs) were calculated as the sum of the contributions from the wind power plants in the specific area. Results: It has been shown that the wind turbine noise at the calculated A-weighted SPL of 30-48 dB was noticed outdoors by 60.3% of the respondents. This noise was perceived as annoying outdoors by 33.3% of the respondents, while indoors by 20.5% of them. The odds ratio of being annoyed outdoors by the wind turbine noise increased along with increasing SPLs (OR = 2.1; 95% CI: 1.22-3.62). The subjects' attitude to wind turbines in general and sensitivity to landscape littering was found to have significant impact on the perceived annoyance. About 63% of variance in outdoors annoyance assessment might be explained by the noise level, general attitude to wind turbines and sensitivity to landscape littering. Conclusions: Before firm conclusions can be drawn further studies are needed, including a larger number of respondents with different living environments (i.e., dissimilar terrain, different urbanization and road traffic intensity).
    Źródło:
    International Journal of Occupational Medicine and Environmental Health; 2014, 27, 3; 364-388
    1232-1087
    1896-494X
    Pojawia się w:
    International Journal of Occupational Medicine and Environmental Health
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Development and Validation of a Numerical Prediction Model to Estimate the Annoyance Condition at the Operation Station of Compact Loaders
    Autorzy:
    Carletti, E.
    Pedrielli, F.
    Casazza, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/90353.pdf
    Data publikacji:
    2011
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    noise
    annoyance
    sound quality
    numerical models
    Opis:
    This paper describes the results of a study aimed at developing and validating a prediction model to assess the annoyance conditions at the operator station of compact loaders by using noise signal objective parameters only. For this purpose, binaural measurements were carried out on 41 compact loaders, both in stationary and real working conditions. The 62 binaural noise recordings were objectively analysed in terms of acoustic and psychoacoustic parameters and then divided into 9 groups and used in specific jury tests to obtain the subjective annoyance scores. Finally, multiple regression technique was applied to the first 6 groups of noise stimuli to develop the model while the remaining groups were used to validate it.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2011, 17, 3; 233-240
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Characterizing Subjective Noisiness in Hospital Lobbies
    Autorzy:
    Chen, C.-Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/177865.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    noisiness
    hospital
    annoyance
    loudness
    autocorrelation function
    reverberation time
    Opis:
    The present study was conducted in the lobbies of 16 Taiwanese urban hospitals to establish what contributes to the degree of noisiness experienced by patients and those accompanying them. Noise level measurements were then conducted by 15 min equivalent sound pressure levels (LAeq, 15m, dB) during daytime hours. The average LAeq itself was found to be poorly related to perceived noisiness. Levels variations were better correlated, more continual noise may actually be perceived as noisier. According to the findings of a multiple linear stepwise regression model (r = 0.91, R2 = 0.83), the 3 independent variables shown to have the largest effects on perceived noisiness were 1) 1/(L5−L95), 2) effective duration of the normalized autocorrelation function (_e, h), of all LAeq, 15m over 9–17, and 3) percentile loudness, N5, 15m. These results resemble previous studies that had assumed that a larger fluctuation of noise level corresponds to less annoyance experienced for mixed traffic noise studied in a laboratory situation. As an advanced approach, for hospital noise that consisted of 12 audible noise events, subjective noisiness were evaluated by the noise time structure analyzed by autocorrelation with loudness and levels variation.
    Źródło:
    Archives of Acoustics; 2015, 40, 2; 235-246
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Perception-Based Method for the Noise Control of Construction Machines
    Autorzy:
    Carletti, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/176980.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    noise control
    acoustic design
    sound quality
    annoyance
    psychoacoustics
    construction machines
    Opis:
    During operation, construction machines generate high noise levels which can adversely affect the health and the job performance of operators. The noise control techniques currently applied to reduce the noise transmitted into the operator cab are all based on the decrease of the sound pressure level. Merely reducing this noise parameter may be suitable for the compliance with the legislative requirements but, unfortunately, it is not sufficient to improve the subjective human response to noise. The absolute necessity to guarantee comfortable and safe conditions for workers, requires a change of perspective and the identification of different noise control criteria able to combine the reduction of noise levels with that of psychophysical descriptors representing those noise attributes related to the subjective acoustical discomfort. This paper presents the results of a study concerning the “customization” of a methodology based on Sound Quality for the noise control of construction machines. The purpose is to define new hearing-related criteria for the noise control able to guarantee not only reduced noise levels at the operator position but also a reduced annoyance perception.
    Źródło:
    Archives of Acoustics; 2013, 38, 2; 253-258
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Assessment of Teachers Exposure to Noise in Selected Primary Schools
    Autorzy:
    Augustyńska, D.
    Kaczmarska, A.
    Mikulski, W.
    Radosz, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/177972.pdf
    Data publikacji:
    2010
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    primary school
    noise
    annoyance
    harmfulness
    questionnaire study
    survey
    acoustical measurements
    Opis:
    The assessment of teachers’ exposure to noise in primary schools was carried out on the basis of: questionnaire studies (covering 187 teachers in 3 schools), noise measurements at the teachers’ workplaces, measurements of the school rooms acoustic properties (reverberation time and speech transmission index STI in 72 classrooms), analysis of statistical data regarding hazards and occupational diseases in the education sector. The studies have shown that noise is the main factor of annoyance in the school environment. Over 50% of questioned teachers consider noise as annoying and near 40% as very annoying or unbearable. A-weighted equivalent continuous sound pressure levels measured in classrooms, teacher rooms and common rooms are in the range of 58–80 dB and they exceed 55 dB (criteria of noise annoyance). The most frequently reported subjective feelings and complaints (over 90%) are: growth of psychical and emotional tension, irritation, difficulties in concentrating, hoarseness, cough. Noise in schools is also a harmful factor. High A-weighted equivalent continuous sound pressure levels ranging from 80 to 85 dB, measured in corridors during pauses and in sports halls, can cause the risk of hearing damage among PE teachers and persons oversensitive to noise. The latter concerns both teachers and pupils. High background noise levels (55–65 dB) force teachers to raise their voice. It can lead to the development of an occupational disease – chronic voice disorders due to excessive vocal effort lasting for at least 15 years. In the education sector 785 new cases of this disease were reported only in 2008. Poor acoustics in classrooms (reverberation time ranging from 0.8 to 1.7 s, STI < 0.6 in 50% of classrooms) have an adverse influence on speech reception and make the teaching and learning processes difficult.
    Źródło:
    Archives of Acoustics; 2010, 35, 4; 521-542
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of sound quality features on environmental noise effects - a case study applied to road traffic noise
    Autorzy:
    Paszkowski, W.
    Kotus, J.
    Poremski, T.
    Kostek, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/221346.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    sound quality
    annoyance
    traffic noise
    Opis:
    The paper shows a study on the relationship between noise measures and sound quality (SQ) features that are related to annoyance caused by the traffic noise. First, a methodology to perform analyses related to the traffic noise annoyance is described including references to parameters of the assessment of road noise sources. Next, the measurement setup, location and results are presented along with the derived sound quality features. Then, statistical analyses are performed to compare the measurement results and sound quality features. The included conclusions are focused on showing that the obtained loudness values, regardless of the used system, are similar in a statistical sense. Contrarily, sharpness, roughness and fluctuation strength values differ for the tools employed.
    Źródło:
    Metrology and Measurement Systems; 2018, 25, 3; 517-531
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Case Study of the Environmental Noise and its Perception in the City of Cluj-Napoca, Romania
    Autorzy:
    Popescu, Diana Ioana
    Powiązania:
    https://bibliotekanauki.pl/articles/1953542.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    environmental noise
    noise perception
    sociological survey
    annoyance
    Opis:
    The noise perceiving issue is very subjective and depends on several factors, such as: the living environment in which each person has grown and developed, the education they have received, the culture in which their life principles have formed and, last but not least, the social and financial status. Therefore, in order to establish effective actions in multiple directions when it comes to any urban noise analysis, it is very important to know the perception and the subjective reactions of the individuals involved. The paper respects this idea, presenting the results of a sociological study on urban noise, applied in the city of Cluj-Napoca, Romania. The intention was to capture the reactions of the permanent residents of the city, but also of the people in transit, as well as to analyse the changes that occurred as result of the implementation of the Environmental Noise Directive (European Commission). The study shows that 75.2% of the respondents consider that the noise in the city has increased in the last ten years and 58% of tchem have rated the noise as level 4 or 5 on a five point scale. Information related to noise maps and actions taken to reduce community noise has no sufficient dissemination. There is also a medium to low reaction of the population in correlation to the declared noise annoyance.
    Źródło:
    Archives of Acoustics; 2020, 45, 4; 625-631
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A study of the Romanian framework and the challenges in implementing the noise mapping legislation
    Autorzy:
    Popescu, Diana Ioana
    Powiązania:
    https://bibliotekanauki.pl/articles/31339841.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    environmental noise
    noise assessment
    noise mapping
    annoyance
    noise exposure
    action plans
    Opis:
    The Environmental Noise Directive (END), published in 2002, was transposed into Romanian local law in 2005, and it was the starting point for the first urban noise mapping exercises, initially conducted in nine Romanian cities. This paper presents the main evolutionary aspects of the noise assessment process, the development of strategic noise maps, and action plans, dealing with both the legislative side and the practical approach and results obtained. The study considers the specific regulations established by the European Commission regarding environmental noise assessment and deals with the global context at the country level, in which they have been implemented and applied.
    Źródło:
    Archives of Acoustics; 2023, 48, 3; 273-280
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Perceiving the advertising in gender-generational characteristics
    Przedstawianie reklamy w charakterystykach gender-generacyjnych
    Autorzy:
    Bačík, R.
    Fedorko, R.
    Rigelský, M.
    Sroka, M.
    Turáková, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/405646.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Częstochowska
    Tematy:
    advertising
    perception
    annoyance
    truth
    influence
    frequency
    memorise
    gender
    generation Y
    generation Z
    reputation management
    reklama
    percepcja
    rozdrażnienie
    prawda
    wpływ
    częstotliwość
    zapamiętywanie
    płeć
    pokolenie Y
    pokolenie Z
    zarządzanie reputacją
    Opis:
    As a primary objective of this study, data were evaluated in the areas of advertising perception and the relationship between gender-generational characteristics was pointed out (generation Y and Z), moreover the selected types of advertising were mentioned. The types of advertising (advertising on TV, social networks, etc.) can acquire various forms (most annoying, most trusted, etc.) in gender-generational characteristics, which can affect the reputation of the organization. The data were obtained through a questionnaire research. The sample consisted of 296 responses. The data collection was implemented in early 2018. A significant difference was found in the perception of advertising in all dimensions among the categories of gender-generational characteristics except the 'most memorable'. Differential analysis was carried out, where significant differences occurred in a number of cases. Furthermore, a correspondent analysis was applied, in which the areas of perceptions of advertising had shown very close relations in several cases. The disadvantage of the research is that it is realized only in Slovakia.
    Jako główny cel tego badania oceniono dane w zakresie postrzegania reklamy oraz wskazano związek między cechami pokoleniowo-płciowymi (pokolenie Y i Z), ponadto wymieniono wybrane rodzaje reklamy. Rodzaje reklam (reklama w telewizji, portale społecznościowe itp.) mogą przybierać różne formy (najbardziej irytujące, najbardziej godne zaufania, itp.) w cechach płciowych, które mogą wpływać na reputację organizacji. Dane uzyskano za pomocą badań ankietowych. Próbka składała się z 296 odpowiedzi. Gromadzenie danych zostało wdrożone na początku 2018 r. Znaczącą różnicę stwierdzono w postrzeganiu reklamy we wszystkich wymiarach wśród kategorii cech pokoleniowych, z wyjątkiem "najbardziej zapadających w pamięć". Przeprowadzono analizę różnicową, w której znaczące różnice wystąpiły w wielu przypadkach. Ponadto zastosowano analizę korespondencyjną, w której obszary percepcji reklamy w kilku przypadkach wykazywały bardzo bliskie relacje. Wada badań polega na tym, że jest ona realizowana tylko na Słowacji.
    Źródło:
    Polish Journal of Management Studies; 2018, 18, 1; 44-57
    2081-7452
    Pojawia się w:
    Polish Journal of Management Studies
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ infradźwięków i hałasu o niskich częstotliwościach na człowieka – przegląd piśmiennictwa
    The influence of infra- and low-frequency sound on human – a review of the literature
    Autorzy:
    Pawlas, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/137803.pdf
    Data publikacji:
    2009
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    infradźwięki
    hałas niskoczęstotliwościowy
    percepcja słuchowa
    skutki zdrowotne
    uciążliwość
    kryteria oceny
    infrasound
    low-frequency noise
    hearing perception
    health effects
    annoyance
    criteria for the assessment
    Opis:
    Infradźwięki są naturalnym zjawiskiem w świecie, a hałas infradźwiękowy powszechnie występuje w pobliżu dróg komunikacyjnych i w środowisku miejskim. W ostatnich latach znacznie wzrosło zainteresowanie infradźwiękami, zarówno ze względu na rozwój technologii wytwarzających infradźwięki i rosnący odsetek populacji eksponowany na ten hałas, jak i licznych niejasności z nim związanych. Z fizycznego punktu widzenia infradźwięki niczym nie różnią się od dźwięków słyszalnych czy ultradźwięków. Są zmianami ciśnienia rozchodzącymi się w postaci fal akustycznych w środowisku materialnym: ciałach stałych, cieczach i gazach. W niniejszym artykule będą rozważane tylko dźwięki rozchodzące się w powietrzu. Podział fal dźwiękowych na infradźwięki, dźwięki słyszalne i ultradźwięki wynika z tradycji i ma swoje korzenie w historycznych już badaniach wrażliwości narządu słuchu w funkcji częstotliwości, gdy skalę dźwiękową, z uwagi na ówczesne możliwości aparatury generującej sygnały akustyczne, podzielono na dźwięki słyszalne od 20 do 20 000 Hz i dźwięki niewywołujące u człowieka wrażenia słuchowego. Zaliczenie dźwięków o częstotliwościach < 20 Hz do dźwięków niesłyszalnych było podyktowane także i tym, że badane osoby określały słyszenie dźwięków z tego zakresu, nie jako słyszenie tonów w „normalnym” sensie, lecz raczej jako odczucie „ucisku” w uszach czy dudnienie, buczenie, a ponadto sygnały o niskich częstotliwościach najpierw były odbierane przez receptory drgań (Moore 1999). Ponadto, zarówno w przypadku dźwięków < 20 Hz, jak i dźwięków > 20 000 Hz problemem były, ograniczone wówczas, technicznie możliwości wytworzenia dźwięków o pożądanych parametrach. Dźwięki o częstotliwości poniżej 20 Hz nazywa się infradźwiękami (w niektórych pracach za górną gra-nicę infradźwięków przyjęto częstotliwość 16 Hz), a dźwięki o częstotliwościach powyżej 20 000 Hz nazwano ultradźwiękami (w niektórych pracach za dolną granicę ultra-dźwięków przyjęto częstotliwość 16 000 Hz). Istnieje wiele źródeł emitujących dźwięki o częstotliwościach poza zakresem 20 ÷ 20 000 Hz zarówno naturalnych, jak i antropogenicznych.
    Infrasound is traditionally defined as low-frequency sound that is inaudible. Infrasound is acoustic energy with a frequency below 16Hz or 20 Hz and both frequency limits are used. There is no agreement regarding a definition of infrasonic noise. According to Polish standard PN-N-01338:1986, noise whose spectrum consists of sounds with frequencies below 50 Hz is called infrasonic noise, but in literature the term low-frequency noise is more common and 250 Hz is usually considered its upper-frequency limit. Besides a natural origin sources of infrasound like volcanoes, tornados, snow avalanches or less intensive ones like sounds of some animals, etc., there are many human origin sources, e.g., air transport, heavy trucks, compressors, ventilation, air-conditioning systems and more recently wind farms. The latter are spreading as alternative renewable sources of energy. That is why interest in infrasound has recently in-creased. Infrasound, contrary to traditional opinion about its inaudibility, is perceived by our body through our hearing organ and perception via mechanoreceptors has been reported when the infrasound is sufficiently strong. Its audibility depends on the acoustic pressure level and re-quires a much higher level than in the conventional range (20 ÷ 20000 Hz). Infrasound at an extreme high level above 175 dB induces aural pain and could destroy the middle and inner ear (eardrum rupture occurs at 185 ÷ 190 dB). Exposure to infrasound induces temporary threshold shift of hearing. Data on permanent hearing effects are scarce and this problem requires further research. The vestibular organ seems to be sensitive. There are some studies reporting that exposure to infrasound elicits nystagmus (eye movements) from both animals and humans and can result in nausea and giddiness. Subjects exposed to infrasound at a high level (above 130 dB) have reported body vibration. In the region of 40 ÷ 80 Hz the lungs, and below 10 Hz the chest, head and abdomen are resonated. Some results on infrasound were the basis for acoustic weapons. The most prominent effect of infrasound is annoyance, especially in non-occupational exposure but extra-aural effects of exposure are very large in dependence of levels, frequency, circumstances and the subject’s sensitivity. The following have been reported: temporary changes in EEG, sleep disturbances, changes in the cardiovascular system and blood pressure, changes in the digestive and endocrine systems and many others. Tiredness, drowsiness, reduction in concentration ability and performance have been shown as well. Experiments with animals supported human results, however, summing up there are many inconsistencies between the results of different research centres. For over 25 years a team led by Alves-Pereira and Castelo Branco has published many papers on the vibroacoustic disease (VAD). According to their hypothesis exposure to low-frequency noise causes many pathological changes called VAD. The list of symptoms is long, starting with mood and behavioral abnormalities that are early findings related to stage 1 of VAD through in-creased irritability and aggressiveness, a tendency for isolation, depressions and decreased cogni-tive skills to psychiatric disorders, hemorrhages, ulcers, neurological problems, muscle pain and many others at VAD stage III. So far, nobody other than Alves-Pereira and Castelo Branco’s team has reported VAD. Therefore, their hypothesis seems to be original but controversial. Lack or scarcity of evidence should be filled by multicenter research based on scientific methods including epidemiological studies. Some problems with the effect of infrasound on human have resulted from the inconsistency in various authors’ measurements of low-frequency noise. There are some regulations related to infrasound and low-frequency noise, e.g., in Sweden, France, Russia, New Zealand and recently Poland. There is also a recommendation of the American Conference of Governmental Industrial Hygienists for ceiling levels of infrasound in occupational settings. Besides, some countries established national criteria for low-frequency noise in the environment or indoors (Denmark, the Netherlands, Germany, the UK, Sweden and Po-land). Summarizing, it should be emphasised that further research on the health effect of infrasound on human are necessary; especially the hypothesis of VAD should be investigated by multi-center research to be confirmed or refuted. Research should be performed using standardized methods of measurement and equipment. So nowadays to establish TLVs for low-frequency noise in occupational settings further research is necessary.
    Źródło:
    Podstawy i Metody Oceny Środowiska Pracy; 2009, 2 (60); 27-64
    1231-868X
    Pojawia się w:
    Podstawy i Metody Oceny Środowiska Pracy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Traffic Noise and its Impact on Wellness of the Residents in Sambalpur City – a Critical Analysis
    Autorzy:
    Sahu, Alekh Kumar
    Nayak, Satish Kumar
    Mohanty, Chitta Ranjan
    Pradhan, Prasanta Kumar
    Powiązania:
    https://bibliotekanauki.pl/articles/1953465.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    traffic noise
    equivalent continuous noise level
    annoyance
    wellness
    noise exposure index
    Opis:
    Noise is unwanted sound judged to be unpleasant, loud or disruptive to hearing. Like air pollution, noise pollution is one of the serious matters of concern in urban areas. Noise pollution occurs when noise level exceeds certain limit and has deleterious effects on human health and wellness. The major sources of noise pollution are industries, road traffic, railways, airplane traffic and social celebrations. The traffic noise is notably high in cities due to higher density of population, frequent movement of people, good transport system coupled with increasing numbers of vehicles (on road). In this work, the assessments of traffic noise in Sambalpur city is presented. Twelve important locations were chosen for the assessment. Noise contours were drawn to visualize the spreading of traffic noise into its surroundings. At the same time, the effect of noise pollution on wellness of the exposed people was studied. The study shows that the traffic noise level and its effects, are both in an alarming stage in the city.
    Źródło:
    Archives of Acoustics; 2021, 46, 2; 353-363
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-15 z 15

      Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies