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Original Article

Hearing in 55 to 75 Year Old People in Northern Finland—A Comparison of Two Classifications of Hearing Impairment

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Pages 69-70 | Published online: 08 Jul 2009

References

  • Liu X, Xu L. Nonsyndromic hearing loss: an analysis of audiograms. Ann Otol Rhinol Laryngol 1994; 103: 428–33
  • WHO. Grades of hearing impairment. Hearing Network News 1991; 1
  • International Organization of Standardization. ISO 389–1991. Acoustics—Standard reference zero for the calibration of pure-tone air conduction audiometers. CH-1211, Geneve 20, Switzerland

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