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Related Experiment Videos

An efficient, adaptive method of measuring loudness growth functions.

G Keidser1, J Seymour, H Dillon

  • 1National Acoustic Laboratories, Chatswood, Australia. gitte.keidser@nal.gov.au

Scandinavian Audiology
|April 20, 1999
PubMed
Summary

A new adaptive loudness scaling procedure offers a time-efficient method for assessing hearing across the full loudness range. This method provides complete loudness functions without needing prior dynamic range measurements.

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Area of Science:

  • Audiology
  • Psychoacoustics
  • Hearing Science

Background:

  • Traditional loudness scaling procedures can be time-consuming.
  • Measuring individual dynamic range is often a prerequisite for loudness testing.
  • Existing methods may not cover the full spectrum from 'not heard' to 'uncomfortably loud'.

Purpose of the Study:

  • To introduce and evaluate a novel adaptive categorical loudness scaling procedure.
  • To assess the time efficiency and completeness of the new loudness scaling method.
  • To compare the reliability and normative data of the adaptive procedure with existing methods.

Main Methods:

  • An adaptive procedure was developed to select loudness levels equispaced on the loudness scale.
  • A continuous scale with minimal labels was employed.

Related Experiment Videos

  • Loudness functions were generated for normal-hearing and hearing-impaired subjects using babble noise across six frequencies.
  • Short-term and long-term reliability were assessed.

    • Main Results:

    • The adaptive procedure was time-efficient and yielded complete loudness functions.
    • Individual dynamic range measurement was not required prior to testing.
    • Reliability patterns were comparable to non-adaptive procedures.
    • Normative curves were generated and compared to existing data.

    Conclusions:

    • The novel adaptive loudness scaling procedure is effective and efficient for assessing loudness perception.
    • This method simplifies the loudness testing process by eliminating the need for pre-measurement of dynamic range.
    • The procedure provides a comprehensive loudness function for diverse hearing capabilities.