Air conduction hearing thresholds of young and older Japanese adults for pure tones from 125 Hz to 16 kHz

Kenji Kurakata*, Tazu Mizunami, Kazuma Matsushita, Kimio Shiraishi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


This Technical Report presents air conduction hearing thresholds measured for pure tones at conventional audiometric frequencies (CAFs) from 125 Hz to 8 kHz and extended high frequencies (EHFs) from 8 kHz to 16 kHz, using apparatus and procedures in accordance with relevant ISO and IEC standards. The subjects were 490 otologically normal Japanese adults aged 18-83 years. Descriptive statistics of their threshold levels are presented in graphical and tabular forms to show the age-related decline of hearing sensitivity and its individual differences. The change in hearing sensitivity of older adults at CAFs was smaller, in general, than the standard values according to ISO 7029:2000, in which the amount of hearing sensitivity decline is estimated as a function of age. The threshold data presented in this report may serve as a basis for revising the international standard. In addition, measurement results at EHFs revealed that the responses of older subjects could be unreliable at the highest frequencies because of an unwanted sound in a lower frequency region generated with test tone presentation. Threshold values at extended high frequencies should be treated with caution.

Original languageEnglish
Pages (from-to)16-22
Number of pages7
JournalAcoustical Science and Technology
Issue number1
Publication statusPublished - 2011
Externally publishedYes


  • Aging effect
  • Air conduction
  • Extended high-frequency audiometry
  • Hearing threshold
  • ISO 7029
  • Pure-tone audiometry

ASJC Scopus subject areas

  • Acoustics and Ultrasonics


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