Age-related reduction of amplitude modulation frequency selectivity.

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  • Additional Information
    • Source:
      Publisher: American Institute of Physics Country of Publication: United States NLM ID: 7503051 Publication Model: Print Cited Medium: Internet ISSN: 1520-8524 (Electronic) Linking ISSN: 00014966 NLM ISO Abbreviation: J Acoust Soc Am Subsets: MEDLINE
    • Publication Information:
      Publication: Melville, NY : American Institute of Physics
      Original Publication: Lancaster, Pa. [etc.] : American Institute of Physics for the Acoustical Society of America
    • Subject Terms:
      Auditory Perception* ; Hearing Loss*; Humans ; Auditory Threshold ; Hearing ; Noise ; Perceptual Masking
    • Abstract:
      The perception of amplitude modulations (AMs) has been characterized by a frequency-selective process in the temporal envelope domain and simulated in computational auditory processing and perception models using a modulation filterbank. Such AM frequency-selective processing has been argued to be critical for the perception of complex sounds, including speech. This study aimed at investigating the effects of age on behavioral AM frequency selectivity in young (n = 11, 22-29 years) versus older (n = 10, 57-77 years) listeners with normal hearing, using a simultaneous AM masking paradigm with a sinusoidal carrier (2.8 kHz), target modulation frequencies of 4, 16, 64, and 128 Hz, and narrowband-noise modulation maskers. A reduction of AM frequency selectivity by a factor of up to 2 was found in the older listeners. While the observed AM selectivity co-varied with the unmasked AM detection sensitivity, the age-related broadening of the masked threshold patterns remained stable even when AM sensitivity was similar across groups for an extended stimulus duration. The results from the present study might provide a valuable basis for further investigations exploring the effects of age and reduced AM frequency selectivity on complex sound perception as well as the interaction of age and hearing impairment on AM processing and perception.
      (© 2023 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).)
    • Publication Date:
      Date Created: 20230424 Date Completed: 20230426 Latest Revision: 20230517
    • Publication Date:
      20240829
    • Accession Number:
      10.1121/10.0017835
    • Accession Number:
      37092934