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Noise induce hearing loss

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https://www.readbyqxmd.com/read/27914298/effects-of-environmental-noise-exposure-on-dna-methylation-in-the-brain-and-metabolic-health
#1
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/27885242/occupational-noise-induced-hearing-loss-in-auto-part-factory-workers-in-welding-units-in-thailand
#2
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/27876737/-the-occupational-risk-of-hearing-impairment-associated-with-cardiovascular-pathologies-in-the-subjects-engaged-in-noisy-industries
#3
V B Pankova, E A Preobrazhenskaya, I N Fedina
The objective of the present study was to analyze the structure of concomitant somatic pathology in the subjects experiencing the occupational hearing problems. The study demonstrated the increase in the frequency of concomitant chronic diseases and the prevalence of polynosological conditions with the increasing severity of hearing impairment. It was shown that cardiovascular pathologies tend to enhance the risk of hearing loss in the employees engaged in «noisy» occupations. The cause-and-effect relationships were elucidated as the contribution of the "vascular" factor to the formation of occupational pathology of the organs of hearing...
2016: Vestnik Otorinolaringologii
https://www.readbyqxmd.com/read/27876480/noise-dosimetry-for-tactical-environments
#4
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/27869248/simplified-risk-assessment-of-noise-induced-hearing-loss-by-means-of-2-spreadsheet-models
#5
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
#6
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/27837052/individual-differences-in-auditory-brainstem-response-wave-characteristics-relations-to-different-aspects-of-peripheral-hearing-loss
#7
Sarah Verhulst, Anoop Jagadeesh, Manfred Mauermann, Frauke Ernst
Little is known about how outer hair cell loss interacts with noise-induced and age-related auditory nerve degradation (i.e., cochlear synaptopathy) to affect auditory brainstem response (ABR) wave characteristics. Given that listeners with impaired audiograms likely suffer from mixtures of these hearing deficits and that ABR amplitudes have successfully been used to isolate synaptopathy in listeners with normal audiograms, an improved understanding of how different hearing pathologies affect the ABR source generators will improve their sensitivity in hearing diagnostics...
November 11, 2016: Trends in Hearing
https://www.readbyqxmd.com/read/27828925/the-genomic-basis-of-noise-induced-hearing-loss-a-literature-review-organized-by-cellular-pathways-erratum
#8
(no author information available yet)
No abstract text is available yet for this article.
December 2016: Otology & Neurotology
https://www.readbyqxmd.com/read/27826232/variable-effects-of-acoustic-trauma-on-behavioral-and-neural-correlates-of-tinnitus-in-individual-animals
#9
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/27815131/sensory-coding-and-cognitive-processing-of-sound-in-veterans-with-blast-exposure
#10
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
#11
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
#12
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
#13
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
#14
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
https://www.readbyqxmd.com/read/27762253/the-protective-effect-of-the-endoplasmic-reticulum-stress-related-factors-bip-grp78-and-chop-gadd153-on-noise-induced-hearing-loss-in-guinea-pigs
#15
Qiuhong Xue, Caihong Li, Jia Chen, Hongmei Guo, Dongqing Li, Xianglei Wu
CONTEXT: The audiological features and cochlear morphology of individuals with noise-induced hearing loss (NIHL) are well characterized. However, the molecular processes in the cochlea are not well understood. AIMS: To explore the role of the endoplasmic reticulum stress (ERS) response in the guinea pig model of cochlear damage induced by exposure to intense noise. SETTINGS AND DESIGN: A pilot case-control study. SUBJECTS AND METHODS: Forty-eight guinea pigs were divided into four equal groups...
September 2016: Noise & Health
https://www.readbyqxmd.com/read/27754825/noise-levels-of-amusement-ride-operators
#16
Lynn R Gilbertson, Liza E Thies, Donna J H Vosburgh
One of the leading causes of noise induced hearing loss is occupational noise exposure; however, little attention has been given to the exposure among amusement ride operators. According to the International Association of Amusement Parks and Attractions, 600,000 ride operators are employed in the United States. The first objective of this descriptive study was to evaluate if ride operators were exposed to noise levels over 85 dB. The second objective was to classify the ride features that led to the highest noise levels...
October 18, 2016: Journal of Occupational and Environmental Hygiene
https://www.readbyqxmd.com/read/27748664/processing-mechanisms-in-hearing-impaired-listeners-evidence-from-reaction-times-and-sentence-interpretation
#17
Rebecca Carroll, Verena Uslar, Thomas Brand, Esther Ruigendijk
OBJECTIVE: The authors aimed to determine whether hearing impairment affects sentence comprehension beyond phoneme or word recognition (i.e., on the sentence level), and to distinguish grammatically induced processing difficulties in structurally complex sentences from perceptual difficulties associated with listening to degraded speech. Effects of hearing impairment or speech in noise were expected to reflect hearer-specific speech recognition difficulties. Any additional processing time caused by the sustained perceptual challenges across the sentence may either be independent of or interact with top-down processing mechanisms associated with grammatical sentence structure...
September 28, 2016: Ear and Hearing
https://www.readbyqxmd.com/read/27746842/curcumin-reduces-the-noise-exposed-cochlear-fibroblasts-apoptosis
#18
Tengku Siti Hajar Haryuna, Wibi Riawan, Ardyansyah Nasution, Suprapto Ma'at, Juliandi Harahap, Indri Adriztina
Introduction The structural changes underlying permanent noise-induced hearing loss (NIHL) include loss of the sensory hair cells, damage to their stereocilia, and supporting tissues within the cochlear lateral wall. Objective The objective of this study is to demonstrate curcumin as a safe and effective therapeutic agent in the prevention and treatment for fibroblasts damage within the cochlear supporting tissues and lateral wall through cell death pathway. Methods We divided 24 Rattus norvegicus into 4 groups, Group 1: control; Group 2: noise (+); Group 3: noise (+), 50 mg/day curcumin (+); Group 4: noise (+), 100 mg/day curcumin (+)...
October 2016: International Archives of Otorhinolaryngology
https://www.readbyqxmd.com/read/27746216/early-age-noise-exposure-increases-loudness-perception-a-novel-animal-model-of-hyperacusis
#19
Ana'am Alkharabsheh, Fen Xiong, Senthilvelan Manohar, Guangdi Chen, Richard Salvi, Wei Sun
The neural mechanisms that give rise to hyperacusis, a reduction in loudness tolerance, are largely unknown. Some reports suggest that hyperacusis is linked to childhood hearing loss. However, the evidence for this is largely circumstantial. In order to rigorously test this hypothesis, we studied loudness changes in rats caused by intense noise exposure (12 kHz narrow band noise, 115 dB SPL, 4 h) at postnatal 16 days. Rats without noise exposure were used as controls. The exposed noise group (n = 7) showed a mean 40-50 dB hearing loss compared to the control group (n = 8) at high frequencies (>= 8 kHz) and less hearing loss at lower frequencies...
October 13, 2016: Hearing Research
https://www.readbyqxmd.com/read/27738526/cochlear-synaptopathy-and-noise-induced-hidden-hearing-loss
#20
Lijuan Shi, Ying Chang, Xiaowei Li, Steve Aiken, Lijie Liu, Jian Wang
Recent studies on animal models have shown that noise exposure that does not lead to permanent threshold shift (PTS) can cause considerable damage around the synapses between inner hair cells (IHCs) and type-I afferent auditory nerve fibers (ANFs). Disruption of these synapses not only disables the innervated ANFs but also results in the slow degeneration of spiral ganglion neurons if the synapses are not reestablished. Such a loss of ANFs should result in signal coding deficits, which are exacerbated by the bias of the damage toward synapses connecting low-spontaneous-rate (SR) ANFs, which are known to be vital for signal coding in noisy background...
2016: Neural Plasticity
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