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Full-Text Articles in Medicine and Health Sciences
An Exploration Of Swallowing Stimulation In The Infant, Sarah Elizabeth Hegyi
An Exploration Of Swallowing Stimulation In The Infant, Sarah Elizabeth Hegyi
Dissertations, 2014-2019
The purpose of this study was twofold: to determine the effects of two types of non-invasive, peripheral sensory stimulation on the frequency of infant swallowing and to explore the cortical activation patterns in response to stimulation in the somatosensory and motor regions of the brain during infancy, between 2-4 months and 7-9 months of age. The two different forms of mechanical stimulation investigated include pacifier stimulation to the lips and oral cavity and vibrotactile stimulation via the external throat area to the laryngeal tissues. The study represents a prospective, repeated experimental research design. Investigators utilized an accelerometer and an inductive …
Comparison Of Speech Intelligibility Over The Telephone Using A Hearing Aid Micorphone And Telecoil, Phillip K. Bond
Comparison Of Speech Intelligibility Over The Telephone Using A Hearing Aid Micorphone And Telecoil, Phillip K. Bond
Dissertations, 2014-2019
The purpose of the current study is to determine if the smaller, modern hearing aid has affected the speech intelligibility over the telephone using a telecoil and hearing aid microphone. Six hearing impaired listeners were situated in a quiet office and were asked to repeat aloud Connected Speech Sentences (CST) they heard through the telephone while wearing their hearing aid in telecoil only mode, microphone only mode, and without their hearing aid. The CST sentences were presented in three different signal-to-noise ratios (Quiet, +10dB, & +5dB) with the recorded speech babble of the CST test. It was discovered that the …
The Effect Of Kalman Weighted Filtering And In-Situ Pre-Amplification On The Accuracy And Efficiency Of Abr Threshold Estimation, Julie Kathleen Wheeler
The Effect Of Kalman Weighted Filtering And In-Situ Pre-Amplification On The Accuracy And Efficiency Of Abr Threshold Estimation, Julie Kathleen Wheeler
Dissertations, 2014-2019
Auditory brainstem responses (ABRs) are important for acquiring frequency specific information for determination of the degree and type of hearing loss for infants and difficult-to-test populations when behavioral audiometry cannot be carried out. This study investigated the effects of Kalman weighted filtering and in-situ pre-amplification employed by the Vivosonic Integrity V500 ABR system on threshold accuracy and efficiency in an environment of high physiologic noise in comparison to a conventional ABR system which employs a standard artifact rejection paradigm. Auditory brainstem responses were collected using the Vivosonic ABR system and a conventional ABR system both in quiet and in noise …
Effects Of Speech Signal Type And Attention On Acceptable Noise Level In Elderly, Hearing-Impaired Listeners, Jennifer Susan Mundorff
Effects Of Speech Signal Type And Attention On Acceptable Noise Level In Elderly, Hearing-Impaired Listeners, Jennifer Susan Mundorff
Dissertations, 2014-2019
The primary objective of this study was to determine if acceptable noise levels (ANLs) in elderly, hearing-impaired listeners were dependent on speech intelligibility and listener attention levels. Acceptable noise levels (ANLs), expressed in decibels, is defined as the maximum background noise level that is acceptable while listening to and following a story. Connected speech test (CST) sentences were recorded with clear speech, conversational speech and temporally altered, fast-rate speech. Thirty-five, elderly, hearing-impaired individuals (61-97 years, M=75) with symmetrical, bilateral sensorineural hearing loss participated. Most comfortable listening levels (MCL) and background noise level (BNL) measurements were completed for each speech stimulus …
Effect Of Real-Ear Verification On Hearing Aid Benefit, Sarah K. Sporck
Effect Of Real-Ear Verification On Hearing Aid Benefit, Sarah K. Sporck
Dissertations, 2014-2019
Real-ear measurements have been proven to be the most accurate measure of hearing aid verification. However, many audiologists find real-ear to be too time consuming to use consistently. One popular reason for underutilizing real-ear verification is the use of first fitting algorithms provided on manufacturer programming software. However, the predicted fittings provided on the software are not an accurate means of providing what is recommended by popular prescriptive formulas (Hawkins and Cook, 2003; Aarts and Caffee, 2005). The main reason for this discrepancy is that the software does not take into account individual anatomical differences, i.e. ear canal volume and …
Objective And Subjective Evaluation Of Wind Noise Reduction In Digital Hearing Aids, Sheena Kate Jessee
Objective And Subjective Evaluation Of Wind Noise Reduction In Digital Hearing Aids, Sheena Kate Jessee
Dissertations, 2014-2019
Wind noise is problematic for hearing aid users who enjoy outdoor activities. Not only is it annoying, it can create distortion by overloading the microphone and masking signals that hearing aid users desire to hear. Some hearing aid manufacturers offer wind noise reduction in addition to general noise reduction (WNR + NR) for clinicians to manipulate in their software. This study compares objective and subjective measures of wind noise reduction as well as subjective measure of intelligibility obtained using various hearing aid manufacturers and noise reduction settings while HINT sentences were played in the presence of constantly generated wind. Significant …