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Karen Helfer BS, MA, PhD

TitleAssociate Professor
InstitutionUniversity of Massachusetts Amherst
DepartmentSchool of Public Health and Health Sciences
Address201B Machmer Hall
Amherst, MA 01003
Phone413-545-4014
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    Collapse selected publications
    Publications listed below are automatically derived from MEDLINE/PubMed and other sources, which might result in incorrect or missing publications. Faculty can login to make corrections and additions.
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    PMC Citations indicate the number of times the publication was cited by articles in PubMed Central, and the Altmetric score represents citations in news articles and social media. (Note that publications are often cited in additional ways that are not shown here.) Fields are based on how the National Library of Medicine (NLM) classifies the publication's journal and might not represent the specific topic of the publication. Translation tags are based on the publication type and the MeSH terms NLM assigns to the publication. Some publications (especially newer ones and publications not in PubMed) might not yet be assigned Field or Translation tags.) Click a Field or Translation tag to filter the publications.
    1. Napoli CD, Helfer KS, van Emmerik REA. Postural Complexity during Listening in Young and Middle-Aged Adults. Entropy (Basel). 2022 May 28; 24(6). PMID: 35741483.
      Citations:    
    2. Helfer KS, Mamo SK, Clauss M, Dunn L. Objective and Subjective Benefit of Direct-to-Consumer Hearing Devices in Middle-Aged Adults. Am J Audiol. 2022 Jun 02; 31(2):348-358. PMID: 35476927.
      Citations:    Fields:    Translation:HumansPHPublic Health
    3. Helfer KS, Mamo SK, Clauss M, Tellerico S. Listening in 2020: A Survey of Adults' Experiences With Pandemic-Related Disruptions. Am J Audiol. 2021 Dec 09; 30(4):941-955. PMID: 34491799.
      Citations:    Fields:    Translation:HumansCellsPHPublic Health
    4. Mamo SK, Helfer KS. Speech Understanding in Modulated Noise and Speech Maskers as a Function of Cognitive Status in Older Adults. Am J Audiol. 2021 Sep 10; 30(3):642-654. PMID: 34314238.
      Citations:    Fields:    Translation:HumansPHPublic Health
    5. Helfer KS, van Emmerik R, Banks JJ, Freyman RL. Early aging and postural control while listening and responding. J Acoust Soc Am. 2020 11; 148(5):3117. PMID: 33261409.
      Citations: 1     Fields:    Translation:Humans
    6. Helfer KS, Jesse A. Hearing and speech processing in midlife. Hear Res. 2021 03 15; 402:108097. PMID: 33706999.
      Citations: 2     Fields:    Translation:HumansPHPublic Health
    7. Helfer KS, Freyman RL, van Emmerik R, Banks J. Postural Control While Listening in Younger and Middle-Aged Adults. Ear Hear. 2020 Sep/Oct; 41(5):1383-1396. PMID: 32149925.
      Citations: 5     Fields:    Translation:HumansPHPublic Health
    8. Helfer KS, Poissant SF, Merchant GR. Word Identification With Temporally Interleaved Competing Sounds by Younger and Older Adult Listeners. Ear Hear. 2020 May/Jun; 41(3):603-614. PMID: 31567564.
      Citations: 2     Fields:    Translation:HumansPHPublic Health
    9. Jesse A, Helfer KS. Lexical Influences on Errors in Masked Speech Perception in Younger, Middle-Aged, and Older Adults. J Speech Lang Hear Res. 2019 04 26; 62(4S):1152-1166. PMID: 31026195.
      Citations: 3     Fields:    Translation:Humans
    10. Helfer KS, Freyman RL, Merchant GR. How repetition influences speech understanding by younger, middle-aged and older adults. Int J Audiol. 2018 09; 57(9):695-702. PMID: 29801416.
      Citations: 3     Fields:    Translation:HumansPHPublic Health
    11. Freyman RL, Terpening J, Costanzi AC, Helfer KS. The Effect of Aging and Priming on Same/Different Judgments Between Text and Partially Masked Speech. Ear Hear. 2017 Nov/Dec; 38(6):672-680. PMID: 28650352.
      Citations: 2     Fields:    Translation:HumansPHPublic Health
    12. Helfer KS. Introduction to the Research Symposium Forum. J Speech Lang Hear Res. 2017 10 17; 60(10):2974-2975. PMID: 29049597.
      Citations:    Fields:    Translation:Humans
    13. Helfer KS, Merchant GR, Wasiuk PA. Age-Related Changes in Objective and Subjective Speech Perception in Complex Listening Environments. J Speech Lang Hear Res. 2017 10 17; 60(10):3009-3018. PMID: 29049601.
      Citations: 12     Fields:    Translation:HumansPHPublic Health
    14. Helfer KS, Merchant GR, Freyman RL. Aging and the effect of target-masker alignment. J Acoust Soc Am. 2016 Nov; 140(5):3844. PMID: 27908027.
      Citations: 8     Fields:    Translation:HumansPHPublic Health
    15. Helfer KS, Freyman RL. Age equivalence in the benefit of repetition for speech understanding. J Acoust Soc Am. 2016 Nov; 140(5):EL371. PMID: 27908048.
      Citations: 5     Fields:    Translation:HumansPHPublic Health
    16. Helfer KS, Jesse A. Lexical influences on competing speech perception in younger, middle-aged, and older adults. J Acoust Soc Am. 2015 Jul; 138(1):363-76. PMID: 26233036.
      Citations: 14     Fields:    Translation:Humans
    17. Helfer KS. Competing Speech Perception in Middle Age. Am J Audiol. 2015 Jun; 24(2):80-3. PMID: 25768264.
      Citations: 5     Fields:    Translation:Humans
    18. Helfer KS, Freyman RL. Stimulus and listener factors affecting age-related changes in competing speech perception. J Acoust Soc Am. 2014 Aug; 136(2):748-59. PMID: 25096109.
      Citations: 31     Fields:    Translation:HumansPHPublic Health
    19. Helfer KS, Staub A. Competing speech perception in older and younger adults: behavioral and eye-movement evidence. Ear Hear. 2014 Mar-Apr; 35(2):161-70. PMID: 24351611.
      Citations: 9     Fields:    Translation:Humans
    20. Helfer KS, Mason CR, Marino C. Aging and the perception of temporally interleaved words. Ear Hear. 2013 Mar-Apr; 34(2):160-7. PMID: 23135617.
      Citations: 5     Fields:    Translation:Humans
    21. Helfer KS, Chevalier J, Freyman RL. Aging, spatial cues, and single- versus dual-task performance in competing speech perception. J Acoust Soc Am. 2010 Dec; 128(6):3625-33. PMID: 21218894.
      Citations: 21     Fields:    Translation:HumansPHPublic Health
    22. Helfer KS, Vargo M. Speech recognition and temporal processing in middle-aged women. J Am Acad Audiol. 2009 Apr; 20(4):264-71. PMID: 19927698.
      Citations: 39     Fields:    Translation:Humans
    23. Helfer KS, Freyman RL. Lexical and indexical cues in masking by competing speech. J Acoust Soc Am. 2009 Jan; 125(1):447-56. PMID: 19173430.
      Citations: 27     Fields:    Translation:HumansPHPublic Health
    24. Freyman RL, Balakrishnan U, Helfer KS. Spatial release from masking with noise-vocoded speech. J Acoust Soc Am. 2008 Sep; 124(3):1627-37. PMID: 19045654.
      Citations: 20     Fields:    Translation:HumansPHPublic Health
    25. Helfer KS, Freyman RL. Aging and speech-on-speech masking. Ear Hear. 2008 Jan; 29(1):87-98. PMID: 18091104.
      Citations: 97     Fields:    Translation:Humans
    26. Whitmal NA, Poissant SF, Freyman RL, Helfer KS. Speech intelligibility in cochlear implant simulations: Effects of carrier type, interfering noise, and subject experience. J Acoust Soc Am. 2007 Oct; 122(4):2376-88. PMID: 17902872.
      Citations: 43     Fields:    Translation:Humans
    27. Freyman RL, Helfer KS, Balakrishnan U. Variability and uncertainty in masking by competing speech. J Acoust Soc Am. 2007 Feb; 121(2):1040-6. PMID: 17348526.
      Citations: 28     Fields:    Translation:Humans
    28. Helfer KS, Freyman RL. The role of visual speech cues in reducing energetic and informational masking. J Acoust Soc Am. 2005 Feb; 117(2):842-9. PMID: 15759704.
      Citations: 39     Fields:    Translation:HumansPHPublic Health
    29. Freyman RL, Balakrishnan U, Helfer KS. Effect of number of masking talkers and auditory priming on informational masking in speech recognition. J Acoust Soc Am. 2004 May; 115(5 Pt 1):2246-56. PMID: 15139635.
      Citations: 102     Fields:    Translation:HumansPHPublic Health
    30. Helfer KS. Cross-sectional study of differences in speech understanding between users and nonusers of estrogen replacement therapy. Exp Aging Res. 2004 Apr-Jun; 30(2):195-204. PMID: 15204632.
      Citations: 1     Fields:    Translation:Humans
    31. Helfer KS. Continuing education in audiology: what do we want? Am J Audiol. 1999 Jun; 8(1):6-12. PMID: 10499112.
      Citations:    Fields:    Translation:Humans
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