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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 Bibliographic 
    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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    1. Helfer KS, Poissant SF, Merchant GR. Word Identification With Temporally Interleaved Competing Sounds by Younger and Older Adult Listeners. Ear Hear. 2019 Sep 19. PMID: 31567564.
      View in: PubMed
    2. 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 Apr 26; 62(4S):1152-1166. PMID: 31026195.
      View in: PubMed
    3. Helfer KS, Freyman RL, Merchant GR. How repetition influences speech understanding by younger, middle-aged and older adults. Int J Audiol. 2018 May 25; 1-8. PMID: 29801416.
      View in: PubMed
    4. 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 Oct 17; 60(10):3009-3018. PMID: 29049601.
      View in: PubMed
    5. Helfer KS. Introduction to the Research Symposium Forum. J Speech Lang Hear Res. 2017 Oct 17; 60(10):2974-2975. PMID: 29049597.
      View in: PubMed
    6. 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 Jun 22. PMID: 28650352.
      View in: PubMed
    7. 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.
      View in: PubMed
    8. 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.
      View in: PubMed
    9. 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.
      View in: PubMed
    10. Helfer KS. Competing Speech Perception in Middle Age. Am J Audiol. 2015 Jun; 24(2):80-3. PMID: 25768264.
      View in: PubMed
    11. 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.
      View in: PubMed
    12. 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.
      View in: PubMed
    13. 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.
      View in: PubMed
    14. 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.
      View in: PubMed
    15. 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.
      View in: PubMed
    16. 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.
      View in: PubMed
    17. 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.
      View in: PubMed
    18. Helfer KS, Freyman RL. Aging and speech-on-speech masking. Ear Hear. 2008 Jan; 29(1):87-98. PMID: 18091104.
      View in: PubMed
    19. 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.
      View in: PubMed
    20. 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.
      View in: PubMed
    21. 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.
      View in: PubMed
    22. 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.
      View in: PubMed
    23. 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.
      View in: PubMed
    24. Helfer KS. Continuing education in audiology: what do we want? Am J Audiol. 1999 Jun; 8(1):6-12. PMID: 10499112.
      View in: PubMed
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