Measures of intensity discrimination

D. Wesley Grantham, A. William Yost

Research output: Contribution to journalArticlepeer-review

32 Scopus citations


Several different measures have been employed in the literature to describe performance by human observers in intensity discrimination tasks. These measures include the difference limen (DL) or “â†/in dB,” the Weber fraction (â†I/I), and signal-to-masker ratio. This article describes the mathematical relationship among these measures for conditions in which masker and signal are (1) sinusoids of the same frequency; (2) sinusoids of different frequencies; and (3) noise waveforms. We provide a table which contains values of each of these measures, describing equivalent performance over the typical range obtained in most intensity discrimination experiments. We express some cautions that should be observed in choosing and reporting particular measures of intensity discrimination.

Original languageEnglish (US)
Pages (from-to)406-410
Number of pages5
JournalJournal of the Acoustical Society of America
Issue number2
StatePublished - Aug 1982
Externally publishedYes

ASJC Scopus subject areas

  • Arts and Humanities (miscellaneous)
  • Acoustics and Ultrasonics


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