Effects of contralateral masking on high-frequency bone-conduction thresholds

John C. Mcdermott, Stephen A. Fausti, James A. Henry, Richard H. Frey

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


The present study reports effects of contralateral masking on high-frequency threshold force levels in 28 normal-hearing subjects. High-frequency air- and bone-conduction thresholds were measured with a high-frequency auditory evaluation system using matched Koss HV/1A earphones and the Pracitronic KH 70/5 bone vibrator. Measurements were made for both unmasked and masked bone-conduction thresholds at the ipsilateral mastoid of the better ear. The contralateral masked condition was performed using 30-dB-SL 400-Hz narrow-band masking noise centered at frequency of test tone. The results demonstrated that masked high-frequency bone-conduction thresholds were 1.5 to 3.4 dB poorer than the unmasked thresholds and that these differences were statistically significant at 0.01 level of confidence except at 12 kHz. ANSI and ISO standards for bone-conduction threshold force levels for frequencies below 8.0 kHz have been established with contralateral masking stimuli. This study supports the need to use effective contralateral masking to eliminate cross hearing in investigations of high-frequency bone-conduction threshold measurements.

Original languageEnglish (US)
Pages (from-to)297-303
Number of pages7
JournalInternational journal of audiology
Issue number6
StatePublished - 1990
Externally publishedYes


  • Binaural summation
  • Bone-conduction thresholds
  • Contralateral effective masking
  • High-frequency audiometry
  • Threshold force level

ASJC Scopus subject areas

  • Language and Linguistics
  • Linguistics and Language
  • Speech and Hearing


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