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 "hearing threshold levels" wg kryterium: Temat

  Lista filtrów
Wyrównaj
    Wyświetlanie 1-6 z 6
    Tytuł:
    Experimental verification of the usefulness of selected infrasound and low-frequency noise (ILFN) indicators in assessing the noise annoyance of wind turbines
    Autorzy:
    Wszołek, Tadeusz
    Mleczko, Dominik
    Pawlik, Paweł
    Kłaczyński, Maciej
    Małecki, Paweł
    Stępień, Bartłomiej
    Powiązania:
    https://bibliotekanauki.pl/articles/24201946.pdf
    Data publikacji:
    2022
    Wydawca:
    Politechnika Poznańska. Instytut Mechaniki Stosowanej
    Tematy:
    wind turbine noise
    infrasound
    low-frequency noise indicators
    hearing threshold levels
    hałas turbin wiatrowych
    infradźwięki
    wskaźniki hałasu niskoczęstotliwościowego
    próg słyszalności
    Opis:
    This paper presents an overview of the indices used in evaluating ILFN noise, based on C and G weighting curves and LC-LA difference parameter, as well as curves compared to the loudness threshold curve. The research section includes measurement results of wind turbine (WT) noise along with proposed indicators for evaluating this noise in the infrasound and low-frequency bands at distances of 250 m, 500 m and 1000 m from the turbine. The results obtained indicate low noise levels in the infrasound band, lower than the threshold curves from a dozen or so dB in the upper part of this band to nearly 60 dB in the lower part. The LC-LA indicator has been shown to be of poor utility for evaluating low-frequency noise, with the LG indicator reasonably useful for evaluating infrasound noise.
    Źródło:
    Vibrations in Physical Systems; 2022, 33, 3; art. no. 2022315
    0860-6897
    Pojawia się w:
    Vibrations in Physical Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Czy progi słuchu u pracowników przemysłu meblarskiego wynikają z ich narażenia na hałas?
    Do hearing threshold levels in workers of the furniture industry reflect their exposure to noise?
    Autorzy:
    Pawlaczyk-Łuszczyńska, Małgorzata
    Dudarewicz, Adam
    Czaja, Norman
    Bortkiewicz, Alicja
    Powiązania:
    https://bibliotekanauki.pl/articles/2164306.pdf
    Data publikacji:
    2016-06-29
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    ekspozycja zawodowa
    hałas
    audiometria tonalna
    uszkodzenie słuchu spowodowane hałasem
    czynniki ryzyka uszkodzenia słuchu
    progi słuchu
    occupational exposure
    noise
    pure-tone audiometry
    noise-induced hearing loss (NIHL)
    risk factors of NIHL
    hearing threshold levels
    Opis:
    Wstęp Celem pracy była analiza stanu słuchu pracowników zakładu meblarskiego z uwzględnieniem ich narażenia zawodowego na hałas i występowania dodatkowych czynników ryzyka uszkodzenia słuchu spowodowanego hałasem. Materiał i metody W grupie 50 mężczyzn w wieku 20–57 lat, zatrudnionych bezpośrednio przy produkcji mebli, przeprowadzono pomiary hałasu, badania kwestionariuszowe i ocenę stanu słuchu z zastosowaniem audiometrii tonalnej. Rzeczywiste progi słuchu pracowników porównano z progami przewidywanymi, wyznaczonymi według normy PN-ISO 1999:2000 na podstawie ich wieku, płci i narażenia na hałas. Wyniki Badane osoby pracowały przez 3–14 lat w warunkach narażenia na hałas o jego dziennym poziomie ekspozycji 82,7–94,8 dB (średnia: 90,9 dB). U wszystkich osób średni próg słuchu dla częstotliwości 500 Hz, 1000 Hz, 2000 Hz i 4000 Hz nie przekraczał 25 dB, ale w przypadku 11% audiogramów zaobserwowano załamki wysokoczęstotliwościowe, typowe dla działania hałasu. Rzeczywiste progi słuchu pracowników w zakresie częstotliwości 3000–6000 Hz były zbliżone do przewidywanych według PN-ISO 1999:2000. Stwierdzono istotnie statystyczne różnice między progami słuchu w podgrupach osób z wyższym (> 78 mm Hg) i niższym (≤ 78 mm Hg) ciśnieniem rozkurczowym krwi, palących papierosy i niepalących oraz pracujących bez kontaktu lub w kontakcie z rozpuszczalnikami organicznymi. U osób z ww. dodatkowymi czynnikami ryzyka obserwowano większe ubytki słuchu. Wnioski Wyniki badań potwierdzają, że podczas szacowania ryzyka uszkodzenia słuchu spowodowanego hałasem i opracowywania programów ochrony słuchu pracowników konieczne jest uwzględnianie dodatkowych (poza hałasem) czynników ryzyka, w tym palenia papierosów, podwyższonego ciśnienia tętniczego krwi i równoczesnej ekspozycji na rozpuszczalniki organiczne. Med. Pr. 2016;67(3):337–351
    Background The aim of the study was to analyze the hearing status of employees of a furniture factory with respect to their exposure to noise and the presence of additional risk factors of noise-induced hearing loss (NIHL). Material and Methods Noise measurements, questionnaire survey and assessment of hearing, using pure tone audiometry, were carried out in 50 male workers, aged 20–57 years, directly employed in the manufacture of furniture. The actual workers’ hearing threshold levels (HTLs) were compared with the predictions calculated according to PN-ISO 1999:2000 based on age, gender and noise exposure. Results Workers under study were exposed to noise at daily noise exposure levels of 82.7–94.8 dB (mean: 90.9 dB) for a period of 3–14 years. In all subjects, mean HTL at 500 Hz, 1000 Hz, 2000 Hz and 4000 Hz did not exceed 25 dB. Nevertheless, high frequency notches were found in 11% of audiograms. The actual workers’ HTLs at 3000–6000 Hz were similar to those predicted using PN-ISO 1999:2000. There were statistical significant differences between HTLs in subgroups of people with higher (> 78 mm Hg) and lower (≤ 78 mm Hg) diastolic blood pressure, smokers and non-smokers, and those working with organic solvents. Hearing loss was more evident in subjects affected by the additional risk factors specified above. Conclusions The results confirm the need to consider, in addition to noise, also some other NIHL risk factors, such as tobacco smoking, elevated blood pressure, and co-exposure to organic solvents when estimating the risk of NIHL and developing the hearing conservation programs for workers. Med Pr 2016;67(3):337–351
    Źródło:
    Medycyna Pracy; 2016, 67, 3; 337-351
    0465-5893
    2353-1339
    Pojawia się w:
    Medycyna Pracy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of Noise Exposure and Hearing Threshold Levels Among Call Centre Operators
    Autorzy:
    Pawlaczyk-Łuszczyńska, Małgorzata
    Zamojska-Daniszewska, Małgorzata
    Zaborowski, Kamil
    Dudarewicz, Adam
    Powiązania:
    https://bibliotekanauki.pl/articles/176315.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    communication headsets
    occupational exposure to noise
    hearing threshold levels
    hearing loss
    noise-induced hearing loss
    Opis:
    The aim of this study was to evaluate the hearing status of call centre operators in relation to their noise exposure. Conventional pure-tone audiometry and extended high-frequency audiometry were performed in 49 workers, aged 22-47 years (mean ± SD: 32.0 ± 6.0 years), working in call centre from 1.0 to 16.5 years (mean ± SD: 4.7 ± 2.9 years). Questionnaire inquiry aimed at collecting personal data, the information on communication headset usage habits, self-assessment of hearing ability and identification of risk factors for noise-induced hearing loss were also carried out. Sound pressure levels generated by the communication headset were determined using the artificial ear technique specified in CSA Z107.56-13 (2013) standard. The background noise prevailing in offices was also measured according to PN-N-01307 (1994) and PN-EN ISO 9612 (2011). Personal daily noise exposure levels in call centre operators varied from 66 to 86 dB (10-90th percentile). About half of the study subjects had normal hearing in the standard frequencies (from 250 to 8000 Hz) in both ears, while only 27.1% in the extended high-frequencies (9-16 kHz). Moreover, both high-frequency and speech-frequency hearing losses were observed in less than 10% of audiograms, while the extended high-frequency threshold shift was noted in 37.1% of analysed ears. The hearing threshold levels of call centre operators in the frequency of 0.25-11.2 kHz were higher (worse) than the expected median values for equivalent (due to age and gender) highly screened population specified in ISO 7029 (2017). Furthermore, they were also higher than predicted for 500-4000 Hz according to ISO 1999 (2013) based on the results of noise exposure evaluation.
    Źródło:
    Archives of Acoustics; 2019, 44, 4; 747-759
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Exposure to excessive sounds and hearing status in academic classical music students
    Autorzy:
    Pawlaczyk-Łuszczyńska, Małgorzata
    Zamojska-Daniszewska, Małgorzata
    Dudarewicz, Adam
    Zaborowski, Kamil
    Powiązania:
    https://bibliotekanauki.pl/articles/2161930.pdf
    Data publikacji:
    2017-02-21
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    noise-induced hearing loss
    music students
    exposure to excessive sounds
    pure-tone audiometry
    hearing threshold levels
    high-frequency notches
    Opis:
    Objectives The aim of this study was to assess hearing of music students in relation to their exposure to excessive sounds. Material and Methods Standard pure-tone audiometry (PTA) was performed in 168 music students, aged 22.5±2.5 years. The control group included 67 subjects, non-music students and non-musicians, aged 22.8±3.3 years. Data on the study subjects’ musical experience, instruments in use, time of weekly practice and additional risk factors for noise-induced hearing loss (NIHL) were identified by means of a questionnaire survey. Sound pressure levels produced by various groups of instruments during solo and group playing were also measured and analyzed. The music students’ audiometric hearing threshold levels (HTLs) were compared with the theoretical predictions calculated according to the International Organization for Standardization standard ISO 1999:2013. Results It was estimated that the music students were exposed for 27.1±14.3 h/week to sounds at the A-weighted equivalent-continuous sound pressure level of 89.9±6.0 dB. There were no significant differences in HTLs between the music students and the control group in the frequency range of 4000–8000 Hz. Furthermore, in each group HTLs in the frequency range 1000–8000 Hz did not exceed 20 dB HL in 83% of the examined ears. Nevertheless, high frequency notched audiograms typical of the noise-induced hearing loss were found in 13.4% and 9% of the musicians and non-musicians, respectively. The odds ratio (OR) of notching in the music students increased significantly along with higher sound pressure levels (OR = 1.07, 95% confidence interval (CI): 1.014–1.13, p < 0.05). The students’ HTLs were worse (higher) than those of a highly screened non-noise-exposed population. Moreover, their hearing loss was less severe than that expected from sound exposure for frequencies of 3000 Hz and 4000 Hz, and it was more severe in the case of frequency of 6000 Hz. Conclusions The results confirm the need for further studies and development of a hearing conservation program for music students. Int J Occup Med Environ Health 2017;30(1):55–75
    Źródło:
    International Journal of Occupational Medicine and Environmental Health; 2017, 30, 1; 55-75
    1232-1087
    1896-494X
    Pojawia się w:
    International Journal of Occupational Medicine and Environmental Health
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hearing Status in Young People Using Portable Audio Players
    Autorzy:
    Pawlaczyk-Łuszczyńska, M.
    Zaborowski, K.
    Zamojska-Daniszewska, M.
    Rutkowska-Kaczmarek, P.
    Dudarewicz, A.
    Śliwinska-Kowalska, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/176501.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    portable audio players
    PAPs
    pure-tone audiometry
    transient-evoked otoacoustic emissions
    TEOAEs
    hearing threshold levels
    high-frequency notches
    noise-induced hearing loss
    Opis:
    The aim of this study was to evaluate the hearing status in young adults using portable audio players (PAPs) in relation to their listening habits. The study included 58 subjects, aged 22.8±2.8 years, non-occupationally exposed to noise. Questionnaire inquiry aimed at collecting personal data, the information on PAPs usage habits, self-assessment of hearing status and identification of risk factors for noise-induced hearing loss (NIHL) were performed in study subjects. Hearing tests included pure-tone audiometry (PTA) and transient-evoked optoacoustic emission (TEOAE). All subjects were PAPs users. Depending on listening habits they were divided into the subgroups of “frequent” users (>1 h/day) and “non-frequent” users (≤1 h/day). There were no significant differences between subgroups in prevalence of NIHL risk factors and self-assessment of hearing status. However, frequent users more often complained of tinnitus and hyperacusis. Majority (81.9 %) of participants had normal hearing. Nevertheless, 6.9 % of audiograms showed high-frequency notches typical for NIHL. Both, the PTA and TEOAE indicated worse hearing in non-frequent users compared to frequent users. No significant differences in prevalence of high-frequency notches between subgroups were noted. The outcomes do not support some previous studies results that the excessive exposure to music listened through PAPs might result in accelerating of development of NIHL loss in young adults.
    Źródło:
    Archives of Acoustics; 2017, 42, 1; 113-120
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Theoretical Predictions and Actual Hearing Threshold Levels in Workers Exposed to Ultrasonic Noise of Impulsive Character—A Pilot Study
    Autorzy:
    Pawlaczyk-Łuszczyńska, M.
    Dudarewicz, A.
    Śliwińska-Kowalska, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/90926.pdf
    Data publikacji:
    2007
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    ultrasonic noise
    noise measurements
    pure-tone audiometry
    hearing threshold levels
    Opis:
    Results of standard pure-tone audiom etry (PTA) were collected from 25 workers, mainly females, aged 23–58 years, exposed for 2–13 years to ultrasonic noise emitted by ultrasonic welders. Hearing tests were completed by evaluation of exposure to ultrasonic noise. The subjects’ actual audiometric hearing threshold levels (HTLs) were compared with theoretical predictions calculated according to ISO 1999:1990. In 60% of cases sound pressure levels in the 10–40 kHz 1/3-octave bands at workstands exceeded Polish exposure limits for ultrasonic noise. Our comparison of predicted and measured HTLs suggests that the ISO 1999:1990 method, intended for audible noise, might also make it possible to predict reliably permanent hearing loss (in the 2 000–6 000 Hz frequency range) after exposure to ultrasonic noise. No significant progress of hearing impairment (assessed using PTA) in the operators of ultrasonic welders was noted. Nevertheless, further studies on the hearing status of workers exposed to ultrasonic noise are needed.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2007, 13, 4; 409--418
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

      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