Open Access
Int Arch Otorhinolaryngol 2013; 17(02): 208-212
DOI: 10.7162/S1809-97772013000200015
Review Article
Thieme Publicações Ltda Rio de Janeiro, Brazil

Noise-Induced Hearing Loss (NIHL): literature review with a focus on occupational medicine

Autoren

  • Mirella Melo Metidieri

    1   Medical Resident.
  • Hugo Fernandes Santos Rodrigues

    1   Medical Resident.
  • Francisco José Motta Barros de Oliveira Filho

    1   Medical Resident.
  • Daniela Pereira Ferraz

    1   Medical Resident.
  • Antonio Fausto de Almeida Neto

    1   Medical Resident.
  • Sandro Torres

    2   Otolaryngologist. Specialist.
Weitere Informationen

Publikationsverlauf

30. September 2012

09. Dezember 2012

Publikationsdatum:
09. Januar 2014 (online)

Summary

According to the Ministry of Health (2006), Noise-Induced Hearing Loss (NIHL) is hearing loss caused by prolonged exposure to noise. It is characterized as sensorineural hearing loss and is usually bilateral, irreversible, and progressive while the exposure to noise continues. A NIHL is a predictable and preventable disease with an epidemiologically relevant prevalence in urban communities. The hearing loss begins and predominates in the frequencies of 3, 4, and 6 kHz and eventually progresses to 8, 2, 1, 0.5, and 0.25 kHz. In Brazil, regulatory standard 15 limits the exposure to continuous noise to no more than 4 hours' exposure to 90 dBA and a maximum level of 85 dB for a full 8-hour working period. As NIHL is a preventable and predictable disease, preventive action by professionals may be able to change the prevalence of hearing loss in noisy environments.