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Speech Pathology and Audiology Commons™
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Articles 1 - 29 of 29
Full-Text Articles in Speech Pathology and Audiology
Exploring Adolescent Hearing Aid Usage And Appearance Of Psychiatric Symptoms In Adolescents Using Hearql-28 Surveys, Courtney J. Austin, Dylan Chan
Exploring Adolescent Hearing Aid Usage And Appearance Of Psychiatric Symptoms In Adolescents Using Hearql-28 Surveys, Courtney J. Austin, Dylan Chan
MEDI 9331 Scholarly Activities Clinical Years
Approximately 2% of DHH people in need of mental health services actually receive these services. Among pediatric hearing loss populations, co-occurring cognitive and physical impairments are risk factors for poor mental health status. Due to language barriers and isolation, more children with hearing loss do not have access to mental health services. Cochlear implants have been shown to improve mental health status among the DHH population. Current literature focuses on the mental health status of children with cochlear implants, with little focus on hearing aid users. Using HEAR28 data and surveys, we can quantify the incidence of psychiatric symptoms among …
Vestibular Migraine And Ssri Withdrawal: A Case Report, Grace Fairchild, Sarah Redding, Ashley G. Flagge
Vestibular Migraine And Ssri Withdrawal: A Case Report, Grace Fairchild, Sarah Redding, Ashley G. Flagge
Ashley Flagge Publications
Vestibular migraine (VM) has been described as a diagnosis of exclusion, with no one singular definitive assessment for diagnosis. It has been suggested that possible pharmaceutical intervention for VM can include antidepressant drugs, but this is potentially complicated by the fact that dizziness is a common side effect of both use and withdrawal for certain types of antidepressant medications. This article describes the case of a 56-year old with probable VM, who was previously diagnosed with depression and treated with the selective serotonin reuptake inhibitor (SSRI) Citalopram. Following discontinuation with no taper, the patient experienced a series of withdrawal side …
Educational Services And Language Congruency In Low-Income Children Who Are Deaf Of Hard-Of-Hearing, Courtney J. Austin, Dylan Chan, Jihyun Stephans
Educational Services And Language Congruency In Low-Income Children Who Are Deaf Of Hard-Of-Hearing, Courtney J. Austin, Dylan Chan, Jihyun Stephans
Research Colloquium
Background: Children who are deaf or hard-of-hearing (DHH) are required by United States law to have access to educational services through the Individuals with Disabilities in Education Act (IDEA). However, access to language-congruent providers, as well as supplemental services, varies considerably. Household income is associated with poorer hearing care access and outcomes in DHH children. We predict that access to supplemental, language-congruent DHH services is poorer in DHH children from lower-income homes.
Methods: This is a secondary, ad hoc exploratory study of DHH children aged 0-27 months enrolled in a randomized clinical trial (CT.gov: NCT04928209). Children were enrolled across all …
Intertrial Coherence As A Measure Of Synchrony In Ocular Vestibular Evoked Myogenic Potentials And The Effect Of Gaze Angle, Sydney Brown
Intertrial Coherence As A Measure Of Synchrony In Ocular Vestibular Evoked Myogenic Potentials And The Effect Of Gaze Angle, Sydney Brown
Dissertations, 2020-current
Ocular vestibular evoked myogenic potentials (oVEMPs) are produced by highly synchronous bursts of extraocular muscle activity in response to stimuli. These responses reflect utricular function and can be recorded using surface electromyography electrodes. Traditional analysis of oVEMPs is limited to time-domain waveform measurements, such as amplitude and latency of response peaks. Objective synchrony-based measures have not yet been applied to the analysis of oVEMPs, particularly in the comparison of synchrony across gaze angles. We followed the new time-frequency method of analysis developed by Clinard et al. (2022) that was successfully applied to cervical VEMPs to quantify response synchrony. Air-conducted oVEMPs …
A Comparison Of Vestibular Function In Young Adult Musicians And Non-Musician Peers, Alexandria W. Greene, Ashley G. Flagge, Nicholas S. Stanley
A Comparison Of Vestibular Function In Young Adult Musicians And Non-Musician Peers, Alexandria W. Greene, Ashley G. Flagge, Nicholas S. Stanley
Ashley Flagge Publications
Purpose: The majority of college-level musicians exceed the daily recommended noise dose level during instrumental practices and performances, although less than one-third report wearing hearing protection while playing their instruments. Although the hazardous effects of music on the auditory system have been established, even in young adult musicians still early in their musical careers, the effects of music on the vestibular system are still unclear. The purpose of the present study was to examine vestibular/balance differences between young adult musicians and non-musicians to determine the effects of music exposure on the vestibular system.
Method: Young adult participants aged 18-27 years …
Diagnostic Overshadowing: A Delayed Diagnosis Of Autism Spectrum Disorder In A Deaf Child, Quynh-Chi Dang, Michael Hoffman, Rachel St. John
Diagnostic Overshadowing: A Delayed Diagnosis Of Autism Spectrum Disorder In A Deaf Child, Quynh-Chi Dang, Michael Hoffman, Rachel St. John
Journal of Early Hearing Detection and Intervention
Diagnostic overshadowing occurs when a patient with a pre-existing diagnosis presents with symptoms that are attributed to the diagnosis, but actually reflect a separate issue. This diagnostic overshadowing can lead to delays in diagnosis, as well as disparities in health care and outcomes. The following case will provide an example in which diagnostic overshadowing contributed to the delay of an autism diagnosis in a child who is deaf. With at least 40 to 50% of children who are deaf or hard of hearing having at least one co-existing medical/developmental condition, and the current prevalence of autism at 1 in 36 …
Applying The Evidence: Taste Manipulation As A Dysphagia Management Strategy, Ross M. Westemeyer, Angela M. Dietsch, Rachel W. Mulheren
Applying The Evidence: Taste Manipulation As A Dysphagia Management Strategy, Ross M. Westemeyer, Angela M. Dietsch, Rachel W. Mulheren
Department of Special Education and Communication Disorders: Faculty Publications
Purpose: This narrative review aims to summarize the evidence regarding taste manipulation as a dysphagia management strategy within the evidence-based practice framework, with a focus on clinical application for speech-language pathologists.
Method: First, we present background information on the physiology of taste and swallowing. A summary of research evidence on the effect of taste on swallowing is presented, followed by suggested methods for incorporating taste into swallowing evaluation and intervention. An overview of individual factors that can impact taste perception is provided. Finally, we discuss methods of clinical application and future directions for clinicians.
Conclusions: Although taste …
Understanding The Effects Of Hormone Treatments On The Transgender Singer: A Pedagogical Study And Voice Studio Guide, Erin M. Hannon
Understanding The Effects Of Hormone Treatments On The Transgender Singer: A Pedagogical Study And Voice Studio Guide, Erin M. Hannon
Theses and Dissertations--Music
Transitioning from one gender to another can be an arduous and emotionally charged experience, accompanied by many physical and mental transformations. The journey of self-discovery and vocal explorations is both unique and deeply personal. Modifications that emerge in an individual's vocal characteristics have a profound influence on their capacity to communicate and express themselves.
Transgender vocal students and professional singers must navigate the delicate balance between their vocal and gender identities while considering the possible risks of Gender Affirming Hormone Therapy. Though these therapies may significantly alter one's appearance and overall well-being, they are also capable of causing notable declines …
The Effect Of Genetic Taste Status On Swallowing: A Literature Review, Theresa S. Lee, Angela M. Dietsch, Rana H. Damra, Rachel W. Mulheren
The Effect Of Genetic Taste Status On Swallowing: A Literature Review, Theresa S. Lee, Angela M. Dietsch, Rana H. Damra, Rachel W. Mulheren
Department of Special Education and Communication Disorders: Faculty Publications
Purpose
Swallowing and taste share innervation pathways and are crucial to nutritive intake. Individuals vary in their perception of taste due to factors such as genetics; however, it is unclear to what extent genetic taste status influences swallowing physiology and function. The purpose of this review article is to provide background on genetic taste status, review the evidence on the association between genetic taste status and swallowing, and discuss research and clinical implications.
Method
A comprehensive literature review was conducted using search terms related to swallowing and genetic taste status. Studies were included if they investigated the main effect of …
Surgical Management Of Velopharyngeal Dysfunction: Major Techniques And Trends For The 21st Century, Dominic Alessio-Bilowus, Sadaf Hashemian, Kylie Nikolli, Ahmed Hashem Md
Surgical Management Of Velopharyngeal Dysfunction: Major Techniques And Trends For The 21st Century, Dominic Alessio-Bilowus, Sadaf Hashemian, Kylie Nikolli, Ahmed Hashem Md
Medical Student Research Symposium
INTRODUCTION: Surgical management of velopharyngeal dysfunction (VPD) has become increasingly complex over recent decades with advances in diagnosis, evaluation and technique, and research focus in this area is expected to shift accordingly. This study aims to educate readers on updates in management of VPD and explore changes in surgical methods through the 21st century.
METHODS: A systematic review was conducted of all literature published on surgical treatment of VPD since the year 2000, following PRISMA reporting guidelines. Adult-acquired VPD, any non-surgical management, implants and prosthetic devices, animal or cadaver models, and case series involving less than 10 subjects were excluded. …
Factors Affecting Variability In Vestibulo-Ocular Reflex Gain In The Video Head Impulse Test In Individuals Without Vestibulopathy: A Systematic Review Of Literature, Laurel Elise Money-Nolan, Ashley G. Flagge
Factors Affecting Variability In Vestibulo-Ocular Reflex Gain In The Video Head Impulse Test In Individuals Without Vestibulopathy: A Systematic Review Of Literature, Laurel Elise Money-Nolan, Ashley G. Flagge
Ashley Flagge Publications
The purpose of this systematic review was to summarize and synthesize published evidence examining variations in vestibulo-ocular reflex (VOR) gain outcomes for the Video Head Impulse Test (vHIT) in healthy individuals without vestibulopathy in order to describe factors that may influence test outcomes. Computerized literature searches were performed from four search engines. The studies were selected based on relevant inclusion and exclusion criteria, and were required to examine VOR gain in healthy adults without vestibulopathy. The studies were screened using Covidence (Cochrane tool) and followed the Preferred Reporting Items for Systematic Reviews and Meta-Analyses statement standards (PRISMA-2020). A total of …
Voice Quality Assessment In Cases Of Vocal Fold Gaps After Single Growth Factor Injection, Amr Roushdyel Badrawy, Asmaa Abdel Hamid, Israa Eltaweel, Azza Abdel Aziz Azzam
Voice Quality Assessment In Cases Of Vocal Fold Gaps After Single Growth Factor Injection, Amr Roushdyel Badrawy, Asmaa Abdel Hamid, Israa Eltaweel, Azza Abdel Aziz Azzam
Journal of Medicine in Scientific Research
In severe vocal fold (VF) lesions, deposits of disorganized, thick collagen bundles and little hyaluronic acid (HA) are deposited in the superficial layer of lamina propria (SLP). These changes lead to severe dysphonia and aspiration, which could be complicated by fatal pneumonia. Unfortunately, no specific treatment has been recognized due to unpredictable VF regeneration. Current progress in regenerative medicine has allowed the development of tissue engineering techniques using cells, scaffolds, and growth factors (GFs). Extrinsic GFs application could help in the induction of the regenerative process. The work aims to assess the voice quality after a single GF injection of …
Effect Of Nodule Size And Stiffness On Phonation Threshold And Collision Pressures In A Synthetic Hemilaryngeal Vocal Fold Model, Mohsen Motie-Shirazi, Matías Zañartu, Sean D Peterson, Daryush D Mehta, Robert E Hillman, Byron D Erath
Effect Of Nodule Size And Stiffness On Phonation Threshold And Collision Pressures In A Synthetic Hemilaryngeal Vocal Fold Model, Mohsen Motie-Shirazi, Matías Zañartu, Sean D Peterson, Daryush D Mehta, Robert E Hillman, Byron D Erath
Faculty, Staff and Student Publications
Synthetic vocal fold (VF) replicas were used to explore the role of nodule size and stiffness on kinematic, aerodynamic, and acoustic measures of voiced speech production. Emphasis was placed on determining how changes in collision pressure may contribute to the development of phonotrauma. This was performed by adding spherical beads with different sizes and moduli of elasticity at the middle of the medial surface of synthetic silicone VF models, representing nodules of varying size and stiffness. The VF models were incorporated into a hemilaryngeal flow facility. For each case, self-sustained oscillations were investigated at the phonation threshold pressure. It was …
Association Of Hearing Loss And Tinnitus Symptoms With Health-Related Quality Of Life Among Long-Term Oropharyngeal Cancer Survivors, Puja Aggarwal, Marc-Elie Nader, Paul W Gidley, Raj Pratihar, Shirin Jivani, Adam S Garden, Frank E Mott, Ryan P Goepfert, Christopher Wallace Ogboe, Camille Charles, Clifton D Fuller, Stephen Y Lai, G Brandon Gunn, Erich M Sturgis, Ehab Y Hanna, Katherine A Hutcheson, Sanjay Shete
Association Of Hearing Loss And Tinnitus Symptoms With Health-Related Quality Of Life Among Long-Term Oropharyngeal Cancer Survivors, Puja Aggarwal, Marc-Elie Nader, Paul W Gidley, Raj Pratihar, Shirin Jivani, Adam S Garden, Frank E Mott, Ryan P Goepfert, Christopher Wallace Ogboe, Camille Charles, Clifton D Fuller, Stephen Y Lai, G Brandon Gunn, Erich M Sturgis, Ehab Y Hanna, Katherine A Hutcheson, Sanjay Shete
Faculty, Staff and Student Publications
BACKGROUND: This study investigated the association of hearing loss and tinnitus with overall health-related quality of life (HRQoL) among long-term oropharyngeal cancer (OPC) survivors.
METHODS: This study included OPC survivors treated between 2000 and 2013 and surveyed from September 2015 to July 2016. Hearing loss and tinnitus were measured by asking survivors to rate their "difficulty with hearing loss and/or ringing in the ears" from 0 (not present) to 10 (as bad as you can imagine). Hearing loss and tinnitus scores were categorized as follows: 0 for none, 1-4 for mild, and 5-10 for moderate to severe. The primary outcome …
Ambulatory Monitoring Of Subglottal Pressure Estimated From Neck-Surface Vibration In Individuals With And Without Voice Disorders, Juan P Cortés, Jon Z Lin, Katherine L Marks, Víctor M Espinoza, Emiro J Ibarra, Matías Zañartu, Robert E Hillman, Daryush D Mehta
Ambulatory Monitoring Of Subglottal Pressure Estimated From Neck-Surface Vibration In Individuals With And Without Voice Disorders, Juan P Cortés, Jon Z Lin, Katherine L Marks, Víctor M Espinoza, Emiro J Ibarra, Matías Zañartu, Robert E Hillman, Daryush D Mehta
Faculty, Staff and Student Publications
The aerodynamic voice assessment of subglottal air pressure can discriminate between speakers with typical voices from patients with voice disorders, with further evidence validating subglottal pressure as a clinical outcome measure. Although estimating subglottal pressure during phonation is an important component of a standard voice assessment, current methods for estimating subglottal pressure rely on non-natural speech tasks in a clinical or laboratory setting. This study reports on the validation of a method for subglottal pressure estimation in individuals with and without voice disorders that can be translated to connected speech to enable the monitoring of vocal function and behavior in …
Daily Phonatory Activity Of Individuals With Parkinson’S Disease, Jeff Searl, Angela M. Dietsch
Daily Phonatory Activity Of Individuals With Parkinson’S Disease, Jeff Searl, Angela M. Dietsch
Department of Special Education and Communication Disorders: Faculty Publications
Purpose
This study evaluated the amount of phonatory activity of Persons with Parkinson disease (PwPD) compared to adults without Parkinson’s disease measured over 3 days. The relationship between the amount of phonatory activity and Voice Handicap Index (VHI) total score was assessed as were differences in voicing activity across 3 days of data collection.
Methods
Fifteen PwPD receiving dopaminergic medication and fifteen age and sex matched adults without Parkinson’s disease completed the VHI and then wore a VocaLog vocal monitor (VM) for 3 consecutive days. From the VM data, the number of 1-second windows with dB sound pressure level > 0 …
The Perception Of Prosody In English-Speaking Children With Cochlear Implants: A Systematic Review, Grace R. Smith
The Perception Of Prosody In English-Speaking Children With Cochlear Implants: A Systematic Review, Grace R. Smith
Dissertations, Theses, and Capstone Projects
Objective: The goal of this paper was to systematically review literature in order to investigate the perception of prosody in English-speaking children with cochlear implants.
Methods: A comprehensive search utilizing various peer-reviewed databases accessible through the City University of New York (CUNY) Graduate Center Library was conducted to identify relevant studies. Inclusion criteria included studies that examined prosody perception in pre-and post-lingually deafened children with cochlear implants. Children who utilized unilateral, bilateral, and bimodal configurations of cochlear implants were therefore included in this search.
Results: 9 studies met the inclusion criteria for this systematic review. The findings …
Audiologic Clinical Practice Patterns: Infant Assessment, Ursula M. Findlen, Nicole D. Schuller
Audiologic Clinical Practice Patterns: Infant Assessment, Ursula M. Findlen, Nicole D. Schuller
Journal of Early Hearing Detection and Intervention
The purpose of the present study was to report the current clinical practice patterns for assessment of infants after a referred newborn hearing screening within the context of available guidelines and to examine how the advent of newer stimuli, technology, and/or instrumentation has changed clinical practice patterns for audiologic infant assessment. A mixed-method survey that included both quantitative and qualitative questions was disseminated to pediatric audiologists in 2017. Quantitative data were analyzed via descriptive statistics while qualitative questions were analyzed via content analysis and combined with associated quantitative data. Lastly, infant assessment test battery categorization was completed to ascertain the …
Neonatal Abstinence Syndrome And Infant Hearing Assessment: A Kids’ Inpatient Database Review, Liza Creel, Adam Van Horn, Alex Hines, Matthew L. Bush
Neonatal Abstinence Syndrome And Infant Hearing Assessment: A Kids’ Inpatient Database Review, Liza Creel, Adam Van Horn, Alex Hines, Matthew L. Bush
Journal of Early Hearing Detection and Intervention
Objective: Neonatal abstinence syndrome (NAS) has become an epidemic. This study assesses documented rates of failed newborn hearing screening (NBHS) or hearing loss diagnosis (HL) in NAS infants, and sociodemographic factors associated with abnormal inpatient hearing results.
Methods: The 2016 HCUP/KID national database was used to identify a weighted sample of infants with failed NBHS/HL during birth hospitalization. Independent variables included diagnoses of NAS/in-utero opioid exposure, HL risk factor presence and sociodemographic data. Univariate analyses and multivariate logistic regression were used to determine associations between NAS and abnormal hearing assessment.
Results:NAS infants had lower odds ratio (OR) of documented …
Improving Hearing Screenings With Tele-Otology, Ryan J. Miller, Joshua George-Lopez, Robert S. Hong Md, Phd
Improving Hearing Screenings With Tele-Otology, Ryan J. Miller, Joshua George-Lopez, Robert S. Hong Md, Phd
Medical Student Research Symposium
Introduction: The Lions Hearing Center of Michigan (LHC-MI) is an assistance program in Detroit that provides hearing aids to individuals in need. LHC-MI has provided thousands of hearing aids, but such efforts have been costly, requiring patients to make multiple appointments at multiple locations. To streamline this process, the LHC-MI is piloting a new program, titled “Hear Now! Detroit!”, that uses telemedicine to reach patients at community sites.
Purpose: To evaluate the feasibility of a hearing screening program that uses telemedicine to reduce the number of visits required to acquire hearing aids.
Methods: Teams of community volunteers were deployed to …
Melodic Contour Identification And Speech Recognition By School-Aged Children, Michael P. Morikawa
Melodic Contour Identification And Speech Recognition By School-Aged Children, Michael P. Morikawa
Dissertations, 2014-2019
Using the Sung Speech Corpus (SSC), which encompasses a single database that contains musical pitch, timbre variations and speech information in identification tasks, the current study aimed to explore the development of normal-hearing children’s ability to use the pitch and timbre cues. Thirteen normal hearing children were recruited for the study ages ranging from 7 to 16 years old. Participants were separated into two separate groups: Younger (7-9) and Older (10-16). Musical Experience was taken into account as well. The Angel Sound ™ program was utilized for testing which was adopted from previous studies, most recently Crew, Galvin, and Fu …
Promotion Of Early Pediatric Hearing Detection Through Patient Navigation, Matthew L. Bush
Promotion Of Early Pediatric Hearing Detection Through Patient Navigation, Matthew L. Bush
Theses and Dissertations--Clinical and Translational Science
Congenital hearing loss is the most common neonatal sensory disorder and it is crucial to diagnose hearing loss as soon as possible after birth in order to facilitate rapid treatment. Universal standards of infant hearing healthcare dictate that infant hearing screening should be completed by one month of age and abnormal screening tests should be followed with definitive audiological testing by three months of age. Obtaining diagnostic testing can be complicated by limited access to care in rural areas, breakdowns in communication, lack of parental support, and poor coordination of care. There is no established method to address appointment non-adherence …
Patient-Reported Variables Associated With The Success Of Behavioral Intervention For Patients With Chronic Cough, Bridget Loomis
Patient-Reported Variables Associated With The Success Of Behavioral Intervention For Patients With Chronic Cough, Bridget Loomis
Graduate Student Theses, Dissertations, & Professional Papers
Purpose: To determine if patient-related variables exist that can potentially discriminate patients with refractory chronic cough (RCC) that are reasonable candidates for behavioral cough therapy (BCT). This study is a small sub-set of a larger, ongoing study, which aims to create and validate a screening tool that primary care physicians can use in order to refer patients early and appropriately for medical or behavioral intervention.
Methods: In this prospective, exploratory study, 20 adult participants, aged 29-68 years of age, answered a bank of questions developed by an expert panel, and the Leicester Cough Questionnaire (LCQ), before and after BCT. Questions …
Investigating The Efficacy Of Vocal Function Exercises In Improving Vocal Function In Adults Irradiated For Laryngeal Cancers: A Three Part Dissertation, Vrushali Angadi
Investigating The Efficacy Of Vocal Function Exercises In Improving Vocal Function In Adults Irradiated For Laryngeal Cancers: A Three Part Dissertation, Vrushali Angadi
Theses and Dissertations--Rehabilitation Sciences
Deterioration in voice quality following radiation therapy for the treatment of laryngeal cancers (LC) is well documented in literature. The majority of studies show that these voice problems are long term and in some cases permanent. Deterioration in voice quality, especially over a period of time could lead to significant communication difficulties in daily life or in some cases could even result in loss of profession. Despite the negative effects of radiation therapy on voice quality being well documented, few studies have focused on the efficacy of voice therapy in the irradiated LC population.
The purpose of this study was …
Intelligibility Of Electrolarynx Speech Using A Novel Hands-Free Actuator, Brian Madden, Mark Nolan, Ted Burke, James Condron, Eugene Coyle
Intelligibility Of Electrolarynx Speech Using A Novel Hands-Free Actuator, Brian Madden, Mark Nolan, Ted Burke, James Condron, Eugene Coyle
Conference Papers
During voiced speech, the larynx provides quasi-periodic acoustic excitation of the vocal tract. In most electrolarynxes, mechanical vibrations are produced by a linear electromechanical actuator, the armature of which percusses against a metal or plastic plate at a frequency within the range of glottal excitation. In this paper, the intelligibility of speech produced using a novel hands-free actuator is compared to speech produced using a conventional electrolarynx. Two able-bodied speakers (one male, one female) performed a closed response test containing 28 monosyllabic words, once using a conventional electrolarynx and a second time using the novel design. The resulting audio recordings …
Intelligibility Of Electrolarynx Speech Using A Novel Actuator, Brian Madden, Mark Nolan, Ted Burke, James Condron, Eugene Coyle
Intelligibility Of Electrolarynx Speech Using A Novel Actuator, Brian Madden, Mark Nolan, Ted Burke, James Condron, Eugene Coyle
Conference Papers
During voiced speech, the larynx provides quasi-periodic acoustic excitation of the vocal tract. Following a laryngectomy, some people speak using an electrolarynx which replaces the excitatory function of the absent larynx. Drawbacks of conventional electrolarynx designs include the buzzing monotonic sound emitted, the need for a free hand to operate the device, and difficulty experienced by many laryngectomees in adapting to its use. Despite these shortcomings, it remains the preferred method of speech rehabilitation for a substantial minority of laryngectomees. In most electrolarynxes, mechanical vibrations are produced by a linear electromechanical actuator, the armature of which percusses against a metal …
Cerumen Composition By Flash Pyrolysis-Gas Chromatography/Mass Spectrometry, Craig N. Burkhart, Michael A. Kruge, Craig G. Burkhart, Curtis Black
Cerumen Composition By Flash Pyrolysis-Gas Chromatography/Mass Spectrometry, Craig N. Burkhart, Michael A. Kruge, Craig G. Burkhart, Curtis Black
Department of Earth and Environmental Studies Faculty Scholarship and Creative Works
Objective: To assess the chemical composition of cerumen by flash pyrolysis-gas chromatography/mass spectrometry.
Study Design: Collected earwax specimens were fractionated into residue and supernatant by means of deoxycholate. This natural bile acid produces significantly better disintegration of earwax in vitro than do presently available ceruminolytic preparations, and also has demonstrated excellent clinical results in vivo to date.
Patients: The sample for analysis was obtained from a patient with clinical earwax impaction.
Results: The supernatant is composed of simple aromatic hydrocarbons, C5-Cl 7 straight-chain hydrocarbons, a complex mixture of compounds tentatively identified as diterpenoids, …
Hearing Screening Of Infants Using Evoked Otoacoustic Emissions : The Effect Of External And Middle Ear Conditions, P. K. Vanaja P. K. Krishna Poduval
Hearing Screening Of Infants Using Evoked Otoacoustic Emissions : The Effect Of External And Middle Ear Conditions, P. K. Vanaja P. K. Krishna Poduval
Student Works (2000-2009)
The aim of the study was to determine if Transient Evoked Otoacoustic Emissions (TEOAEs) can be used as a method of Screening for hearing impairment and to study the effects of External and Middle ear conditions on the outcome of TEOAEs. TEOAE and Tympanometry tests were performed on 193 infants (386 ears). External and Middle ear abnormalities were evaluated by ear examinations and Tympanometry, and assigned to two groups based on the tympanogram results. Group A had normal external and middle ear with 'Type A' Tympanograms and group B with external and/ middle ear abnormalities and abnormal tympanograms other than …
The Effect Of Masking On The Acoustic Reflex Threshold, Nancy E. Aldrich
The Effect Of Masking On The Acoustic Reflex Threshold, Nancy E. Aldrich
Loma Linda University Electronic Theses, Dissertations & Projects
This study investigated the effect of masking noise on the threshold for stapedial reflex. It has been shown that masking which shifts the hearing threshold causes a loudness function typical of recruitment. It was hypothesized that the stapedial reflex threshold remains the same in a masked situation as in the unmasked situation . It was suggested that this demonstrates recruitment in that the presence of noise reduces the range between hearing thresholds and stapedial reflex thresholds.
Ten subjects, with no known hearing loss or pathology involving the ear or reflex arc were used in this study. A 1000 Hz tone …