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Current Research Projects


Early Intervention of Age Related Hearing Loss

 

 

Hearing impairment affects more than 28 million Americans, and is the third most prevalent chronic disease affecting seniors. The negative effects of age on a person’s hearing begins in the third decade of life and increases significantly after 50 years of age. Because of its gradual onset, hearing loss in its early stages is difficult to perceive. However, even when people are aware that their hearing has deteriorated they are often reluctant to seek help.  It’s been shown that untreated hearing loss can have a negative impact on a person’s quality of life and long-term hearing loss can lead to neurophysiological deterioration. Much of the research in this area has focused on older people. Thus, relatively little is known about the extent to which hearing aids can serve to minimize the sensory, cognitive, and social consequences of early age-related hearing loss and auditory deprivation.  The purpose of this study is to assess if wearing hearing aids during the early stages of age-related hearing loss can improve speech recognition and recognition memory in middle aged and younger older adults. Their project entitled “Benefits of Amplification for Early Age-Related Hearing Loss” is being funded by the National Institutes of Health (NIH/NIA) through the Center for Aging and Policy Studies.

(Grant # P30AG034464 (2009 - 2014))

 


Effects of Age-Related Auditory & Cognitive Changes on Speech Understanding in Noise

Currently, most commercially available digital hearing aids incorporate a digital noise reduction (NR) algorithm to improve a hearing impaired listener’s speech understanding in noise.  However, NR algorithms have failed to show much benefit in actually improving listeners’ ability to understand noisy speech. Yet, hearing aid users frequently report that they prefer NR because it makes it easier for them to listen to speech in the presence of background noise.  Thus, while NR may not improve a listener’s speech intelligibility score, it may reduce the cognitive load of listening to speech in noise.  The purpose of this study is to objectively measure the cognitive demands of understanding speech in interfering background noise in older listeners with hearing impairment. In addition, we will evaluate how effective a NR algorithm in a commercial hearing aid is in reducing older hearing impaired listeners’ cognitive effort on a speech in noise task. 


Recent Publications

Doherty, K.A. & Desjardins, J.L. (in prep). Aging effects on how older listeners use the spectral information in noisy and time compressed sentences. Journal of the Acoustical Society of America.


Desjardins, J.L. & Doherty, K.A. (submitted). The effect of hearing aid noise reduction on listening efforts in older adults. Ear and Hearing.


Desjardins, J.L. & Doherty, K.A. (2013). Age-realatd changes in listening effort for various types of masker noises. Ear and hearing. Vol. 34. (3), 261-272.


Doherty, K.A. & Desjardins, J.L. (2012). The Practical Hearing Aid Skills Test Revised (PHAST-R). The American Journal of Audiology, 21, 100-105.


Desjardins, J. L. & Doherty, K.A. (2009). Do experienced hearing aid users know how to use their hearing aids correctly? The American Journal of    Audiology, 18, 69-76.


Shi, L. & Doherty, K.A. (2008).  Effect of Dynamic Compression Characteristics and Reverberation on Aided Speech Perception.  Journal of Speech, Language and Hearing Research, 51, 1-13.


Calandruccio, L. & Doherty, K. A. (2008). Spectral weighting strategies for hearing-impaired listeners  measured using a correlational method. Journal of the Acoustical Society of America, 123, 2367-2378.


Calandruccio, L. & Doherty, K. A. (2007). Spectral weighting functions for sentences measured by a correlational method.  Journal of the Acoustical Society of America, 121, 3827- 3836.


Calandruccio, L., Doherty, K. A., Carney, L. H., & Kikkeri, H. (2007).  Perception of temporally processed speech by hearing-impaired listeners.  Ear and Hearing, 28 (4), 512-523.


Shi, L. F., Doherty, K. A., Kordas, T. M., & Pellegrino, J. T. (2007). Short- and Long-Term Hearing-Aid Benefit and User Satisfaction: A Comparison between Two Fitting Protocols. Journal of American Academy of Audiology, 18 (6), 482-495.


Shi, L.F., Doherty, K. A., & Zwislocki, J. J. (2007). Aided Loudness Growth and Satisfaction with Everyday Loudness Perception in Compression Hearing-Aid Users. Journal of American Academy of Audiology, 18, 206- 219.


Anzalone, M. C., Calandruccio, L., Doherty, K. A., & Carney, L. H. (2006).  Determination of the Potential Benefit of Time-Frequency Gain Manipulation. Ear and Hearing, 27(5), 480-492.


Shi, L., Carney L.H. and Doherty, K.A. (2006). Correction of the Peripheral Spatiotemporal Response Pattern:  A Potential New Signal-Processing Strategy.  Journal of Speech, Language and Hearing Research,
49, 848-855.


Doherty, K.A. & Lutfi, R.A. (1999).  Level discrimination of single tones in a broadband signal by normal-hearing and hearing-impaired listeners.  Journal of the Acoustical Society of America, 105, 1831-1840.


Recent Presentations

Carney, L.H., Mao, J., Koch, K. & Doherty, K.A. (2013). Modeling detection of 500-Hz tones in reproducible noise for listeners with sensorieneural hearing loss.  21st International Congress on Acoustics.  Montreal, Quebec, Canada.

O'Flaherty, S.N., Doherty, K.A. & Desjardins, J.L. (2013). The effect of hearing aids on memory test scores. New York State Speech-Language-Hearing Association 53rd Annual Convention, Saratoga Springs, NY

Doherty, K.A. & Desjardins, J.L. (2013). Advantages of using amplification for early age-related hearing loss. American Auditory Society, Scottsdale, AZ.

Mao, J., Doherty, K.A., Koch, K.J. & Carney, L.H. (2013). Effects of sensorineural hearing loss on roving-level tone-in-noise detection. American Auditory Society Meeting, Scottsdale, AZ.

Desjardins, J.L. & Doherty, K.A. (2013). Reducing listening effort in background noise with hearing aids. American Auditory Society, Scottsdale, AZ.

Desjardins, J.L. & Doherty, K.A. (2012). Objective verification of hearing aid users' ability to use and care for their hearing aids. ARA Conference, Providence, RI.

Doherty, K.A., Desjardins, J.L. & Hoyer, W.J. (2012). Benefit of amplification on cognitive function, hearing handicap, and attitudes towards wearing hearing aids in the early stages of age-related hearing loss.  ARA Conference, Providence, RI.

Doherty, K.A., Desjardins, J.L. & Hoyer, W.J. (2012). Effect of hearing aids on cognitive function, hearing handicap, and attitudes towards wearing hearing aids in the early stages of age-related learing loss. International Adult Hearing Screening Conference, Lake Cuomo, Italy.

Desjardins, J.L. & Doherty, K.A. (2012). The effect of hearing aid noise reduction on listening effort in older adults. American Academy of Audiology Annual Meeting, Boston, MA.

Doherty, K.A. & Fasulo, E. (2011). Older Hospital Patients' Use of Assistive Listening Devices. American Academy of Audiology Annual Conference, Chicago, IL.

Doherty, K., Desjardins, J., Pellegrino, J., Kordas, T., Kennedy, K. (2011). Are Your Clients Incorrectly Using Their Hearing Aids? American Academy of Audiology Annual Conference, Chicago, IL.

Desjardins, J. & Doherty, K. (2010). Age-related changes in listening effort for various types of masker noises. American Speech Language Hearing Association, Philadelphia, PA.

Doherty, K., Desjardins, J., Pellegrino, J., Kordas, T., Kennedy, K. (2010). Cognitive and sensory function affects on manipulation of hearing instruments. American Speech Language Hearing Association, Philadelphia, PA.

Doherty,K. & Desjardins, J. (2010). Age effects on subjective and objective hearing aid outcome measures. American Academy of Audiology, San Diego, CA.

Doherty, K., Desjardins, J., Pellegrino, J., Kordas, T., Kennedy, K. (2010). Clinical applications of the Practical Hearing Aid Skills Test. American Auditory Society, Scottsdale, AZ.

Desjardins, J., Jenner, A., Huckins, S., Doherty, K. (2009). How younger and older adults process rapid speech: An fMRI study.  Syracuse University Showcase, Syracuse, NY.

Desjardins, J., Jenner, A., Huckins, S., Doherty, K. (2009). Functional neuroanatomy associated with auditory temporal processing in older adults. American Auditory Society, Scottsdale, AZ.

Doherty, K. A., Sled, A., Calandruccio, L. (2009). Spectral weighting strategies for speech features at various presentation levels. American Auditory Society, Scottsdale, AZ.

Desjardins, J. & Doherty, K.A. (2008). Age effects on listening strategies used to process time-compressed speech. American Speech Language Hearing Association, Chicago, IL.

Desjardins, J., Calandruccio, L. & Doherty, K. A. (2008). Aging effects on how older listeners use the spectral information in speech. American Auditory Society, Scottsdale, AZ.

Doherty, K.A. (2008). The Aging Ear. Summer Institute: Age and Engagement in the Classroom, Syracuse University, Syracuse, NY.

Doherty, K. A. and Desjardins, J. L.   (2007). Relationship between practical and self reported  hearing aid knowledge. American Speech-Language-Hearing Association Annual Conference, Boston, MA.

Desjardins, J. L. and Doherty, K. A. (2007). A novel test for assessment of practical hearing aid skills. American Auditory Society Meeting, Scottsdale, AZ.

Sled, A. and Doherty, K.A. (2007). Presentation level effects on listeners' weighting strategies for speech. American Speech-Language-Hearing Association Annual Conference, Boston, MA.

Calandruccio, L., and Doherty, K. A. (2007). Effect of overall level on spectral weighting strategies for speech. American Auditory Society Meeting, Scottsdale, AZ.

Shi, L. and  Doherty, K.A. (2006). Syllabic and Dual Compression hearing aid settings: A field study. American Speech-Language-Hearing Association Annual Conference, Miami, FL.

Calandruccio, L. and Doherty, K. A. (2006). How Listeners With & Without Hearing Loss Process Sentences. American Speech-Language-Hearing Association Annual Conference, Miami, FL.

Lalor, K. A., Calandruccio, L. and Doherty, K. A (2006). How listeners use information in sentences versus vowel consonants. Mayfest, Syracuse University, Syracuse, N.Y.

Calandruccio, L. and Doherty, K. A. (2006). Spectral weighting strategies for listeners with normal hearing. American Auditory Society Meeting, Scottsdale, AZ.

Shi, L. and  Doherty, K.A. (2006). Effect of Dynamic Compression Characteristics on Listeners' Perception of Reverberant Speech. International Hearing Aid Research Conference. Lake Tahoe, CA

Anzalone, M. C., Doherty, K.A. and Carney, L.H.  (2005). Potential benefit to intelligibility of time-frequency gain manipulation. American Auditory Society Meeting, Scottsdale, AZ.

Calandruccio, L., Doherty, K. A., Kikkeri, H.N., and Carney,L.H. (2005). Perception of temporally processed speech by hearing-impaired listeners. American Auditory Society Meeting, Scottsdale, AZ.

Calandruccio, L., Kikkeri, H.N. Carney, L.H., and Doherty, K. A (2005). Temporally processed speech - preference and intelligibility results of listeners with hearing impairment. Lake Ontario Auditory Neuroscience (LOAN) meeting, McMaster University, Hamilton, ON

Shi, L., Doherty, K., Kordas, T. M.,  Pellegrino, J. T. (2005). Short & Long-Term Hearing-Aid Satisfaction Using Two Fitting Protocols. American Speech-Language-Hearing Association Annual Conference, San Diego,CA.