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Noise. Hearing loss. Noise exposure.

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https://www.readbyqxmd.com/read/27918210/emerging-therapeutic-interventions-against-noise-induced-hearing-loss
#1
Su-Hua Sha, Jochen Schacht
Noise-induced hearing loss (NIHL) due to industrial, military, and recreational noise exposure is a major, but also potentially preventable cause of acquired hearing loss. For the United States it is estimated that 26 million people (15% of the population) between the ages of 20 and 69 have a high-frequency NIHL at a detriment to the quality of life of the affected individuals and great economic cost to society. Areas covered: This review outlines the pathology and pathophysiology of hearing loss as seen in humans and animal models...
December 5, 2016: Expert Opinion on Investigational Drugs
https://www.readbyqxmd.com/read/27916698/cellular-mechanisms-of-noise-induced-hearing-loss
#2
Arwa Kurabi, Elizabeth M Keithley, Gary D Housley, Allen F Ryan, Ann C-Y Wong
Exposure to intense sound or noise can result in purely temporary threshold shift (TTS), or leave a residual permanent threshold shift (PTS) along with alterations in growth functions of auditory nerve output. Recent research has revealed a number of mechanisms that contribute to noise-induced hearing loss (NIHL). The principle cause of NIHL is damage to cochlear hair cells and associated synaptopathy. Contributions to TTS include reversible damage to hair cell (HC) stereocilia or synapses, while moderate TTS reflects protective purinergic hearing adaptation...
December 1, 2016: Hearing Research
https://www.readbyqxmd.com/read/27914298/effects-of-environmental-noise-exposure-on-dna-methylation-in-the-brain-and-metabolic-health
#3
Liqiong Guo, Peng-Hui Li, Hua Li, Elena Colicino, Silvia Colicino, Yi Wen, Ruiping Zhang, Xiaotian Feng, Timothy M Barrow, Akin Cayir, Andrea A Baccarelli, Hyang-Min Byun
Environmental noise exposure is associated with adverse effects on human health including hearing loss, heart disease, and changes in stress-related hormone levels. Alteration in DNA methylation in response to environmental exposures is a well-known phenomenon and it is implicated in many human diseases. Understanding how environmental noise exposures affect DNA methylation patterns may help to elucidate the link between noise and adverse effects on health. In this pilot study we examined the effects of environmental noise exposure on DNA methylation of genes related to brain function and investigated whether these changes are related with metabolic health...
November 30, 2016: Environmental Research
https://www.readbyqxmd.com/read/27913314/audiologic-characteristics-in-a-sample-of-recently-separated-military-veterans-the-noise-outcomes-in-servicemembers-epidemiology-study-noise-study
#4
J S Gordon, S E Griest, E J Thielman, K C Carlson, W J Helt, M S Lewis, C Blankenship, D Austin, S M Theodoroff, J A Henry
Military Service Members are often exposed to high levels of occupational noise, solvents, and other exposures that can be damaging to the auditory system. Little is known about hearing loss and how it progresses in Veterans following military service. This epidemiology study is designed to evaluate and monitor a cohort of Veterans for 20 years or more to determine how hearing loss changes over time and how those changes are related to noise exposure and other ototoxic exposures encountered during military service...
November 29, 2016: Hearing Research
https://www.readbyqxmd.com/read/27895575/can-animal-models-contribute-to-understanding-tinnitus-heterogeneity-in-humans
#5
REVIEW
Jos J Eggermont
The brain activity of humans with tinnitus of various etiologies is typically studied with electro- and magneto-encephalography and functional magnetic resonance imaging-based imaging techniques. Consequently, they measure population responses and mostly from the neocortex. The latter also underlies changes in neural networks that may be attributed to tinnitus. However, factors not strictly related to tinnitus such as hearing loss and hyperacusis, as well as other co-occurring disorders play a prominent role in these changes...
2016: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/27885242/occupational-noise-induced-hearing-loss-in-auto-part-factory-workers-in-welding-units-in-thailand
#6
Apiradee Sriopas, Robert S Chapman, Saravudh Sutammasa, Wattasit Siriwong
OBJECTIVES: Most workers in auto part factories in Thailand are usually exposed to excessive noise in their workplace. This study aimed to assess the level of occupational noise-induced hearing loss and investigate risk factors causing hearing loss in auto part factory workers in the welding units in Thailand. METHODS: This was a cross- sectional study. One hundred eighty subjects were recruited from 356 workers in the welding unit of three factories. Sixty eligible subjects in each factory were selected by systemic random sampling...
November 22, 2016: Journal of Occupational Health
https://www.readbyqxmd.com/read/27878601/reduction-of-permanent-hearing%C3%A2-loss-by-local-glucocorticoid-application-guinea-pigs-with-acute-acoustic-trauma
#7
M Müller, M Tisch, H Maier, H Löwenheim
BACKGROUND: High-intensity noise exposure from impulse and blast noise events often leads to acute hearing loss and may cause irreversible permanent hearing loss as a long-term consequence. Here, a treatment regime was developed to limit permanent damage based on a preclinical animal model of acute noise trauma. AIM: To develop clinical trials for the treatment of acute noise traumas using approved drugs. The otoprotective potential of glucocorticoids applied locally to the inner ear was examined...
November 23, 2016: HNO
https://www.readbyqxmd.com/read/27876480/noise-dosimetry-for-tactical-environments
#8
Christopher J Smalt, Joe Lacirignola, Shakti K Davis, Paul T Calamia, Paula P Collins
Noise exposure and the subsequent hearing loss are well documented aspects of military life. Numerous studies have indicated high rates of noise-induced hearing injury (NIHI) in active-duty service men and women, and recent statistics from the U.S. Department of Veterans Affairs indicate a population of veterans with hearing loss that is growing at an increasing rate. In an effort to minimize hearing loss, the U.S. Department of Defense (DoD) updated its Hearing Conservation Program in 2010, and also has recently revised the DoD Design Criteria Standard Noise Limits (MIL-STD-1474E) which defines allowable noise levels in the design of all military acquisitions including weapons and vehicles...
November 20, 2016: Hearing Research
https://www.readbyqxmd.com/read/27871188/what-can-35-years-and-over-700-000-measurements-tell-us-about-noise-exposure-in-the-mining-industry
#9
Benjamin Roberts, Kan Sun, Richard L Neitzel
OBJECTIVE: To analyse over 700,000 cross-sectional measurements from the Mine Safety and Health Administration (MHSA) and develop statistical models to predict noise exposure for a worker. DESIGN: Descriptive statistics were used to summarise the data. Two linear regression models were used to predict noise exposure based on MSHA-permissible exposure limit (PEL) and action level (AL), respectively. Twofold cross validation was used to compare the exposure estimates from the models to actual measurement...
November 22, 2016: International Journal of Audiology
https://www.readbyqxmd.com/read/27869248/simplified-risk-assessment-of-noise-induced-hearing-loss-by-means-of-2-spreadsheet-models
#10
Arve Lie, Bo Engdahl, Kristian Tambs
OBJECTIVES: The objective of this study has been to test 2 spreadsheet models to compare the observed with the expected hearing loss for a Norwegian reference population. MATERIAL AND METHODS: The prevalence rates of the Norwegian and the National Institute for Occupational Safety and Health (NIOSH) definitions of hearing outcomes were calculated in terms of sex and age, 20-64 years old, for a screened (with no occupational noise exposure) (N = 18 858) and unscreened (N = 38 333) Norwegian reference population from the Nord-Trøndelag Hearing Loss Study (NTHLS)...
November 18, 2016: International Journal of Occupational Medicine and Environmental Health
https://www.readbyqxmd.com/read/27853057/noise-induced-hearing-loss-among-professional-musicians
#11
Pouryaghoub Gholamreza, Ramin Mehrdad, Saeed Pourhosein
OBJECTIVES: After presbycusis, noise exposure is considered the second cause of sensorineural hearing loss. Due to exposure to high-intensity sounds, musicians may be at risk of noise-induced hearing loss (NIHL). Given the importance of good hearing in music career, this study aimed to investigate the frequency of hearing loss and use of protective measures among Iranian musicians. METHODS: In this cross-sectional study, 125 musicians, including 21 women (16.8%) and 104 men (83...
November 16, 2016: Journal of Occupational Health
https://www.readbyqxmd.com/read/27849248/what-we-know-of-the-central-auditory-disorders-in-children-exposed-to-alcohol-during-pregnancy-systematic-review
#12
Humberto de Oliveira Simões, Sthella Zanchetta, Erikson Felipe Furtado
Purpose: To identify the effects of alcohol intake during pregnancy on the central auditory nervous system in relation to their possible diagnosis, Fetal Alcohol Syndrome, partial Fetal Alcohol Syndrome, Alcohol-Related Birth Defects and Alcohol-Related Neurodevelopmental Disorder, his extension and the hearing assessment method. Research strategy: Systematic and integrative review searched the databases PubMed, LILACS and SciELO, with terms in Portuguese and English "fetal alcohol syndrome", "alcohol-related disorders" associated with "hearing"...
September 2016: CoDAS
https://www.readbyqxmd.com/read/27830350/longitudinal-changes-in-audiometric-phenotypes-of-age-related-hearing-loss
#13
Kenneth I Vaden, Lois J Matthews, Mark A Eckert, Judy R Dubno
Presbyacusis, or age-related hearing loss, can be characterized in humans as metabolic and sensory phenotypes, based on patterns of audiometric thresholds that were established in animal models. The metabolic phenotype is thought to result from deterioration of the cochlear lateral wall and reduced endocochlear potential that decreases cochlear amplification and produces a mild, flat hearing loss at lower frequencies coupled with a gradually sloping hearing loss at higher frequencies. The sensory phenotype, resulting from environmental exposures such as excessive noise or ototoxic drugs, involves damage to sensory and non-sensory cells and loss of the cochlear amplifier, which produces a 50-70 dB threshold shift at higher frequencies...
November 9, 2016: Journal of the Association for Research in Otolaryngology: JARO
https://www.readbyqxmd.com/read/27826232/variable-effects-of-acoustic-trauma-on-behavioral-and-neural-correlates-of-tinnitus-in-individual-animals
#14
Ryan J Longenecker, Alexander V Galazyuk
The etiology of tinnitus is known to be diverse in the human population. An appropriate animal model of tinnitus should incorporate this pathological diversity. Previous studies evaluating the effect of acoustic over exposure (AOE) have found that animals typically display increased spontaneous firing rates and bursting activity of auditory neurons, which often has been linked to behavioral evidence of tinnitus. However, only a subset of studies directly associated these neural correlates to individual animals...
2016: Frontiers in Behavioral Neuroscience
https://www.readbyqxmd.com/read/27825859/lifetime-leisure-music-exposure-associated-with-increased-frequency-of-tinnitus
#15
David R Moore, Oliver Zobay, Robert C Mackinnon, William M Whitmer, Michael A Akeroyd
Tinnitus has been linked to noise exposure, a common form of which is listening to music as a leisure activity. The relationship between tinnitus and type and duration of music exposure is not well understood. We conducted an internet-based population study that asked participants questions about lifetime music exposure and hearing, and included a hearing test involving speech intelligibility in noise, the High Frequency Digit Triplets Test. 4950 people aged 17-75 years completed all questions and the hearing test...
November 5, 2016: Hearing Research
https://www.readbyqxmd.com/read/27815131/sensory-coding-and-cognitive-processing-of-sound-in-veterans-with-blast-exposure
#16
Scott Bressler, Hannah Goldberg, Barbara Shinn-Cunningham
Recent anecdotal reports from VA audiology clinics as well as a few published studies have identified a sub-population of Service Members seeking treatment for problems communicating in everyday, noisy listening environments despite having normal to near-normal hearing thresholds. Because of their increased risk of exposure to dangerous levels of prolonged noise and transient explosive blast events, communication problems in these soldiers could be due to either hearing loss (traditional or "hidden") in the auditory sensory periphery or from blast-induced injury to cortical networks associated with attention...
November 2, 2016: Hearing Research
https://www.readbyqxmd.com/read/27793584/effects-of-long-term-non-traumatic-noise-exposure-on-the-adult-central-auditory-system-hearing-problems-without-hearing-loss
#17
REVIEW
Jos J Eggermont
It is known that hearing loss induces plastic changes in the brain, causing loudness recruitment and hyperacusis, increased spontaneous firing rates and neural synchrony, reorganizations of the cortical tonotopic maps, and tinnitus. Much less in known about the central effects of exposure to sounds that cause a temporary hearing loss, affect the ribbon synapses in the inner hair cells, and cause a loss of high-threshold auditory nerve fibers. In contrast there is a wealth of information about central effects of long-duration sound exposures at levels ≤ 80 dB SPL that do not even cause a temporary hearing loss...
October 25, 2016: Hearing Research
https://www.readbyqxmd.com/read/27784763/-span-style-margin-0px-font-family-arial-sans-serif-font-size-12pt-differential-effects-of-pannexins-on-noise-induced-hearing-loss-span
#18
Julia M Abitbol, John J Kelly, Kevin Barr, Ashley L Schormans, Dale W Laird, Brian L Allman
Hearing loss, including noise-induced hearing loss, is highly prevalent and severely hinders an individual's quality of life, yet many of the mechanisms that cause hearing loss are unknown. The Pannexin (Panx) channel proteins, Panx1 and Panx3 are regionally expressed in many cell types along the auditory pathway and mice lacking Panx1 in specific cells of the inner ear exhibit hearing loss, suggesting a vital role for pannexins in hearing. We proposed that Panx1 and/or Panx3 null mice would exhibit severe hearing loss and increased susceptibility to noise-induced hearing loss...
October 26, 2016: Biochemical Journal
https://www.readbyqxmd.com/read/27769922/styrene-enhances-the-noise-induced-oxidative-stress-in-the-cochlea-and-affects-differently-mechanosensory-and-supporting-cells
#19
REVIEW
A R Fetoni, R Rolesi, F Paciello, S L M Eramo, C Grassi, D Troiani, G Paludetti
Experimental and human investigations have raised the level of concern about the potential ototoxicity of organic solvents and their interaction with noise. The main objective of this study was to characterize the effects of the combined noise and styrene exposure on hearing focusing on the mechanism of damage on the sensorineural cells and supporting cells of the organ of Corti and neurons of the ganglion of Corti. The impact of single and combined exposures on hearing was evaluated by auditory functional testing and histological analyses of cochlear specimens...
October 18, 2016: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/27766410/the-therapeutic-effect-of-thymoquinone-on-acoustic-trauma-induced-hearing-loss-in-rats
#20
Mahmut Ogurlu, Ozlem Celebi Erdivanli, Levent Tumkaya, Abdulkadir Ozgur, Zerrin Ozergin Coskun, Suat Terzi, Munir Demirci, Engin Dursun
Thymoquinone has antioxidant properties. We hypothesized that thymoquinone may prevent or alleviate hearing loss induced by acoustic trauma. We aimed to study thymoquinone's effect on hearing function with distortion-product otoacoustic emissions and auditory brainstem response. Thirty adult Spraque Dawley rats were randomized into four groups following exposure to acoustic trauma for 4 h. Control group (n = 7) did not receive further treatment. Thymoquinone-20 (n = 8) and Thymoquinone-40 (n = 8) received 20 and 40 mg/kg of intraperitoneal thymoquinone, respectively...
October 20, 2016: European Archives of Oto-rhino-laryngology
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