title: High-frequency Audiometry Hearing on Monitoring of Individuals Exposed to Occupational Noise: A Systematic Review.
abstract: BACKGROUND
  The literature reports on high-frequency audiometry as one of the exams used on hearing monitoring of individuals exposed to high sound pressure in their work environment, due to the method́s greater sensitivity in early identification of hearing loss caused by noise. The frequencies that compose the exam are generally between 9 KHz and 20KHz, depending on the equipment.
  
  
  OBJECTIVE
  This study aims to perform a retrospective and secondary systematic revision of publications on high-frequency audiometry on hearing monitoring of individuals exposed to occupational noise.
  
  
  RESULTS
  This systematic revision followed the methodology proposed in the Cochrane Handbook, focusing on the question: "Is High-frequency Audiometry more sensitive than Conventional Audiometry in the screening of early hearing loss individuals exposed to occupational noise?" The search was based on PubMed data, Base, Web of Science (Capes), Biblioteca Virtual em Saúde (BVS), and in the references cited in identified and selected articles. The search resulted in 6059 articles in total. Of these, only six studies were compatible with the criteria proposed in this study.
  
  
  CONCLUSIONS
  The performed meta-analysis does not definitively answer the study's proposed question. It indicates that the 16 KHz high frequency audiometry (HFA) frequency is sensitive in early identification of hearing loss in the control group (medium difference (MD = 8.33)), as well as the 4 KHz frequency (CA), this one being a little less expressive (MD = 5.72). Thus, others studies are necessary to confirm the HFA importance for the early screening of hearing loss on individuals exposed to noise at the workplace.
authors.affiliation: Specialization on Advanced Audition, Instituto de Estudos Avançados da Audição, São Paulo, SP, Brazil.
authors.forename: Cleonice Aparecida Silva
authors.initials: CA
authors.lastname: Antonioli
authors.affiliation: Specialization on Advanced Audition, Instituto de Estudos Avançados da Audição, São Paulo, SP, Brazil; Audiologist, PUC, São Paulo, São Paulo, Brazil.
authors.forename: Teresa Maria
authors.initials: TM
authors.lastname: Momensohn-Santos
authors.affiliation: Statistics, UNICAMP, Campinas, São Paulo, Brazil.
authors.forename: Tatiana Aparecida Silva
authors.initials: TA
authors.lastname: Benaglia
keywords: hearing; hearing loss; hearing loss caused by noise; hearing tests; high-frequency; monitoring