New Who Guidelines for Community Noise

Berglund, Birgitta; Lindvall, Thomas; Schwela, Dietrich

doi:10.1260/0957456001497535

Cited by 571 publications

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“…Numbers of squares crossed by each animal were counted for 5 min period. 2 The common assessment for anxiety like behavior in Albino Wistar is the elevated plus maze test (EPM). 8 The setup used in this experiment consisted of two open arms crossed with two closed arms.…”

Section: Methodsmentioning

confidence: 99%

A study on behavioural effects of laboratory rats (albino wistar) after the sub-chronic noise stress

Bodhika

Jayakody

2018

Int J Res Med Sci

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Background: Humans and animals can hear a wide range of sound frequencies. If the sense of hearing is impaired, both man and animal cannot fare well in their respective environments. Present study is aimed to investigate the behavioral effects following the sub-chronic noise stress of a rat species, Albino Wistar.Methods: The sound source consists of a set of speakers, GWINSTEK AFG-2000 series function generator and an amplifier. Sound levels and frequencies were monitored by B and K type 2250 sound level meter. Six adult Albino Wistars were exposed to sound frequencies of 1-20 kHz, at intervals of 1 kHz at LAeq of 70-80 dB for 5minute periods and their behavior was recorded. In the second test four adult rats were randomly divided into control and test groups. The test animals were exposed to noise of 7, 8, 9 and 10 kHz for 4hrs daily while keeping the control group in same room for same period of time without exposing to the sound. Locomotive activity, increase of defection and decrease of social activities, of rats was assessed by open field test (OFT). Anxiety and depressive behavior were monitored by elevated plus maze test (EPM) and tail suspension test (TST).Results: A different behavior in rats was observed in frequency range of 7-10 kHz. At the beginning of exposure, all rats were huddled in a group and then some were frozen into motionless stance. A less time spent and less number of entries in open arm was noticed in test sample compared to the controls in the EPM test. A tendency to move to open field compared to controls was identified in OFT. The TST revealed that a significant increase in immobility time, which indicates a depression like behavior of noise stressed rats compared to controls.Conclusions: According to the study the most effective noise frequency range for rats is 7-10 kHzl.

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Section: Methodsmentioning

confidence: 99%

A study on behavioural effects of laboratory rats (albino wistar) after the sub-chronic noise stress

Bodhika

Jayakody

2018

Int J Res Med Sci

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“…Because, typically, the SPL of normal speech is about 50 dBA at a listener's ears, ambient noise with sound levels of 35 dBA or more reduces the intelligibility of normal speech. 33 The aim of the present study was twofold: (1) to investigate the actual noise levels that children are exposed to at the level of the ears during a normal day in a day care setting and (2) to study the effects of a day at the day care on vocal parameters by perceptual evaluation of voice quality.…”

Section: Introductionmentioning

confidence: 99%

Child Voice and Noise: A Pilot Study of Noise in Day Cares and the Effects on 10 Children's Voice Quality According to Perceptual Evaluation

et al. 2009

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SummaryThe purpose of this investigation was to study children's exposure to background noise at the ears during a normal day at the day care center and also to relate this to a perceptual evaluation of voice quality. Ten children, from three day care centers, with no history of hearing and speech problems or frequent infections were selected as subjects. A binaural recording technique was used with two microphones placed on both sides of the subject's head, at equal distance from the mouth. A portable digital audio tape (DAT) recorder (Sony TCD-D 100, Stockholm, Sweden) was attached to the subject's waist. Three recordings were made for each child during the day. Each recording was calibrated and started with three repetitions of three sentences containing only sonorants. The recording technique allowed separate analyses of the background noise level and of the sound pressure level (SPL) of each subjects' own voice. Results showed a mean background noise level for the three day care centers at 82.6 dBA Leq, ranging from 81.5 to 83.6 dBA Leq. Day care center no. 2 had the highest mean value and also the highest value at any separate recording session with a mean background noise level of 85.4 dBA Leq during the noontime recordings. Perceptual evaluation showed that the children attending this day care center also received higher values on the following voice characteristics: hoarseness, breathiness, and hyperfunction. Girls increased their loudness level during the day, whereas for boys no such change could be observed.

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“…Rušivým býva nielen hluk z dopravy, ale aj hluk zo zariadení domu, zo susedných bytov a zo zábavných podnikov v blízkom okolí. Nepríjemný býva aj nízkofrekvenčný hluk alebo hluk kombinovaný s vibráciami (44).…”

Section: Hluk a Poruchy Spánkuunclassified

“…Deti v hlučnejších oblastiach majú zvýšenú aktivitu sympatika, zvýšenú hladinu stresových hormónov a zvýšený pokojový tlak krvi. Nadmerný hluk sa podieľa na zhoršení pracovného výkonu a zvýšenom výskyte chýb a pracovných úrazov (44,40,45).…”

Section: Přehledové Práceunclassified

Environmental Noise Exposure and Its Effect on Population Health

Filova¹,

Samohýl²,

Argalášová³

2015

Hygiena

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SÚHRNRastúci vplyv expozície environmentálnemu hluku a jeho vplyv na zdravie, patrí k významným problémom súčasnej doby. Týka sa to predovšetkým obyvateľstva, žijúceho v mestských aglomeráciách s vysokou hladinou environmentálneho hluku. Príčinou tohto nežiaduceho javu je najmä narastajúca doprava a priemysel. Hladiny hluku narastajú nielen v niektorých typických pracovných prevádzkach, ale obťažujú ľudí už aj pri rekreácii, oddychu, či spoločenských aktivitách. Tento negatívny faktor životného prostredia sa odlišuje od iných škodlivín tým, že sa jeho hladiny stále zvyšujú a pôsobí na človeka neustále, teda aj v čase určenom na relaxáciu ako napríklad pri spánku. Z verejno-zdravotníckeho hľadiska je významné, že rušivé pôsobenie environmentálneho hluku sa prejavuje neskôr rastúcim rizikom chronických ochorení, ktoré majú priamu súvislosť s poruchami spánku a iných funkcií vo vegetatívnej, endokrinnej a regulačnej sfére. Cieľom tejto prehľadovej práce je zosumarizovať aktuálne poznatky o škodlivých sluchových a nesluchových účinkoch environmentálneho hluku, ktoré bude možné využiť pri kvantifikácií rizika ako aj pri pláno-vaní preventívnych opatrení.Klíčová slova: hluk -expozícia, prevencia hluku, prostredie životné -vplyv na zdravie SUMMARYThe growing impact of environmental noise exposure on health is a major problems of our times. It particularly concerns the urban population living in areas with high levels of environmental noise. Increased levels of traffic and industrial activity are the major causative factors of this phenomenon. Increased noise levels cause interpersonal problems not only in occcupational settings, but during recreation, leisure, and social activities. This negative environmental factor differs from others in specifically affecting sleep and relentlessly increasing. In terms of public health, the disturbing effects of environmental noise manifest in increased risk of chronic diseases dircetly associated with sleep disorders and other vegetative, endocrine and regulatory functions. The aim of this review is to summarize current knowledge about the harmful auditory and non-auditory effects of environmental noise, which can be used in the risk quantification and planning of preventive measures.Key words: noise -exposure, noise prevention, environment -health effects Hluk vždy predstavoval dôležitý problém životné-ho prostredia. Hodnotenie rizika hlukovej expozície predstavuje mimoriadne naliehavý problém v dôsled-ku enormného nárastu akustickej energie. V porovnaní s inými znečisťujúcimi látkami hluk nepôsobí okamži-te, jeho hladiny sa neustále zvyšujú a pôsobí na člove-ka neustále, teda aj v čase určenom na relaxáciu. Kontrole environmentálneho hluku bráni spoločenská nenahraditeľnosť dopravy a to, že v mnohých prípadoch neexistujú technické možnosti, ako účinne tlmiť hluk.Hluková záťaž populácie pochádza v 40 % z pracovného a 60 % z mimopracovného prostredia. V sídelných aglomeráciách v mimopracovnom prostredí prevažuje hluk z dopravy, pričom hladiny tohto tzv. komunálne-ho hluku sa pohybu...

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New Who Guidelines for Community Noise

Cited by 571 publications

References 0 publications

A study on behavioural effects of laboratory rats (albino wistar) after the sub-chronic noise stress

A study on behavioural effects of laboratory rats (albino wistar) after the sub-chronic noise stress

Child Voice and Noise: A Pilot Study of Noise in Day Cares and the Effects on 10 Children's Voice Quality According to Perceptual Evaluation

Environmental Noise Exposure and Its Effect on Population Health

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