Acoustic and psychoacoustic analysis of the noise produced by the police force firearms
Autor(a) principal: | |
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Data de Publicação: | 2011 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1808-86942011000200005&lng=pt&nrm=iso&tlng=pt http://hdl.handle.net/11449/10755 |
Resumo: | Police officers are exposed to impact noise coming from firearms, which may cause irreversible injuries to the hearing system.Aim: To evaluate the noise exposure in shooting stands during gunfire exercises, to analyze the acoustic impact of the noise produced by the firearms and to associate it with tonal audiometry results.Study design: Cross-sectional.Materials and methods: To measure noise intensity we used a digital sound level meter, and the acoustic analysis was carried out by means of the oscillations and cochlear response curves provided by the Praat software. 30 police officers were selected (27 males and 3 females).Results: The peak level measured was 113.1 dB(C) from a .40 pistol and 116.8 dB(C) for a .38 revolver. The values obtained for oscillation and Praat was 17.9 +/- 0.3 Barks, corresponding to the rate of 4,120 and 4,580 Hz. Audiometry indicated greater hearing loss at 4,000Hz in 86.7% of the cases.Conclusion: With the acoustic analysis it was possible to show cause and effect between the main areas of energy excitation of the cochlea (Praat cochlear response curve) and the frequencies of low hearing acuity. |
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Acoustic and psychoacoustic analysis of the noise produced by the police force firearmsAnálise acústica e psicoacústica do ruído de armas utilizadas pela Polícia MilitarfirearmspolicenoiseoccupationalPolice officers are exposed to impact noise coming from firearms, which may cause irreversible injuries to the hearing system.Aim: To evaluate the noise exposure in shooting stands during gunfire exercises, to analyze the acoustic impact of the noise produced by the firearms and to associate it with tonal audiometry results.Study design: Cross-sectional.Materials and methods: To measure noise intensity we used a digital sound level meter, and the acoustic analysis was carried out by means of the oscillations and cochlear response curves provided by the Praat software. 30 police officers were selected (27 males and 3 females).Results: The peak level measured was 113.1 dB(C) from a .40 pistol and 116.8 dB(C) for a .38 revolver. The values obtained for oscillation and Praat was 17.9 +/- 0.3 Barks, corresponding to the rate of 4,120 and 4,580 Hz. Audiometry indicated greater hearing loss at 4,000Hz in 86.7% of the cases.Conclusion: With the acoustic analysis it was possible to show cause and effect between the main areas of energy excitation of the cochlea (Praat cochlear response curve) and the frequencies of low hearing acuity.Os policiais militares estão expostos a ruídos de impacto provenientes de armas de fogo, os quais são capazes de causar lesões irreversíveis ao sistema auditivo. OBJETIVO: Avaliar a exposição ao ruído no estande de tiros durante os exercícios de tiro, analisar acusticamente o ruído de impacto e relacioná-lo com os resultados de audiometria tonal. FORMA DE ESTUDO: Transversal. MATERIAL E MÉTODO: A medição do ruído foi feita por meio de decibelímetro digital e a análise acústica foi feita no software Praat, levantando as curvas de oscilograma e cocleograma. Foi selecionada uma amostra de 30 policiais militares (27 masculinos e 3 femininos). RESULTADOS: Os picos máximos medidos no estante de tiros foram de 113,1 dB(C) para pistola .40 e 116,8 dB(C) para revólver .38. Os valores obtidos por meio da relação entre o oscilograma temporal e cocleograma Praat ficaram entre 17,9±0,3 Barks, correspondendo à faixa entre 4120 e 4580 Hz. As medidas da audiometria indicaram maior perda auditiva na faixa de 4000Hz em 86,7% dos casos. CONCLUSÃO: A partir da análise acústica dos tiros, foi possível demonstrar causa e efeito entre as principais áreas de excitação de energia na cóclea (cocleograma Praat) e as frequências com diminuição de acuidade auditiva.Univ Estadual Paulista, Fac Filosofia & Ciencias, BR-17525900 São Paulo, BrazilUniv Estadual Paulista, Fac Filosofia & Ciencias, BR-17525900 São Paulo, BrazilAssoc Brasileira Otorrinolaringologia & Cirurgia CervicofacialUniversidade Estadual Paulista (Unesp)Guida, Heraldo Lorena [UNESP]Diniz, Thiago Hernandes [UNESP]Kinoshita, Sergio Koodi [UNESP]2014-05-20T13:31:34Z2014-05-20T13:31:34Z2011-03-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article163-170application/pdfapplication/pdfhttp://www.scielo.br/scielo.php?script=sci_arttext&pid=S1808-86942011000200005&lng=pt&nrm=iso&tlng=ptBrazilian Journal of Otorhinolaryngology. São Paulo: Assoc Brasileira Otorrinolaringologia & Cirurgia Cervicofacial, v. 77, n. 2, p. 163-170, 2011.1808-8694http://hdl.handle.net/11449/10755S1808-86942011000200005WOS:000293578500005S1808-86942011000200005-pt.pdfS1808-86942011000200005-en.pdf2545336847709120Web of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengBrazilian Journal of Otorhinolaryngology1.4120,443info:eu-repo/semantics/openAccess2023-10-26T06:11:26Zoai:repositorio.unesp.br:11449/10755Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462023-10-26T06:11:26Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Acoustic and psychoacoustic analysis of the noise produced by the police force firearms Análise acústica e psicoacústica do ruído de armas utilizadas pela Polícia Militar |
title |
Acoustic and psychoacoustic analysis of the noise produced by the police force firearms |
spellingShingle |
Acoustic and psychoacoustic analysis of the noise produced by the police force firearms Guida, Heraldo Lorena [UNESP] firearms police noise occupational |
title_short |
Acoustic and psychoacoustic analysis of the noise produced by the police force firearms |
title_full |
Acoustic and psychoacoustic analysis of the noise produced by the police force firearms |
title_fullStr |
Acoustic and psychoacoustic analysis of the noise produced by the police force firearms |
title_full_unstemmed |
Acoustic and psychoacoustic analysis of the noise produced by the police force firearms |
title_sort |
Acoustic and psychoacoustic analysis of the noise produced by the police force firearms |
author |
Guida, Heraldo Lorena [UNESP] |
author_facet |
Guida, Heraldo Lorena [UNESP] Diniz, Thiago Hernandes [UNESP] Kinoshita, Sergio Koodi [UNESP] |
author_role |
author |
author2 |
Diniz, Thiago Hernandes [UNESP] Kinoshita, Sergio Koodi [UNESP] |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Guida, Heraldo Lorena [UNESP] Diniz, Thiago Hernandes [UNESP] Kinoshita, Sergio Koodi [UNESP] |
dc.subject.por.fl_str_mv |
firearms police noise occupational |
topic |
firearms police noise occupational |
description |
Police officers are exposed to impact noise coming from firearms, which may cause irreversible injuries to the hearing system.Aim: To evaluate the noise exposure in shooting stands during gunfire exercises, to analyze the acoustic impact of the noise produced by the firearms and to associate it with tonal audiometry results.Study design: Cross-sectional.Materials and methods: To measure noise intensity we used a digital sound level meter, and the acoustic analysis was carried out by means of the oscillations and cochlear response curves provided by the Praat software. 30 police officers were selected (27 males and 3 females).Results: The peak level measured was 113.1 dB(C) from a .40 pistol and 116.8 dB(C) for a .38 revolver. The values obtained for oscillation and Praat was 17.9 +/- 0.3 Barks, corresponding to the rate of 4,120 and 4,580 Hz. Audiometry indicated greater hearing loss at 4,000Hz in 86.7% of the cases.Conclusion: With the acoustic analysis it was possible to show cause and effect between the main areas of energy excitation of the cochlea (Praat cochlear response curve) and the frequencies of low hearing acuity. |
publishDate |
2011 |
dc.date.none.fl_str_mv |
2011-03-01 2014-05-20T13:31:34Z 2014-05-20T13:31:34Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1808-86942011000200005&lng=pt&nrm=iso&tlng=pt Brazilian Journal of Otorhinolaryngology. São Paulo: Assoc Brasileira Otorrinolaringologia & Cirurgia Cervicofacial, v. 77, n. 2, p. 163-170, 2011. 1808-8694 http://hdl.handle.net/11449/10755 S1808-86942011000200005 WOS:000293578500005 S1808-86942011000200005-pt.pdf S1808-86942011000200005-en.pdf 2545336847709120 |
url |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1808-86942011000200005&lng=pt&nrm=iso&tlng=pt http://hdl.handle.net/11449/10755 |
identifier_str_mv |
Brazilian Journal of Otorhinolaryngology. São Paulo: Assoc Brasileira Otorrinolaringologia & Cirurgia Cervicofacial, v. 77, n. 2, p. 163-170, 2011. 1808-8694 S1808-86942011000200005 WOS:000293578500005 S1808-86942011000200005-pt.pdf S1808-86942011000200005-en.pdf 2545336847709120 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Brazilian Journal of Otorhinolaryngology 1.412 0,443 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
163-170 application/pdf application/pdf |
dc.publisher.none.fl_str_mv |
Assoc Brasileira Otorrinolaringologia & Cirurgia Cervicofacial |
publisher.none.fl_str_mv |
Assoc Brasileira Otorrinolaringologia & Cirurgia Cervicofacial |
dc.source.none.fl_str_mv |
Web of Science reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
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1799964710357958656 |