Environmental noise-induced cardiovascular responses during sleep

Abstract Study Objectives This study was designed to test the utility of cardiovascular responses as markers of potentially different environmental noise disruption effects of wind farm compared to traffic noise exposure during sleep. Methods Twenty participants underwent polysomnography. In random order, and at six sound pressure levels from 33 dBA to 48 dBA in 3 dB increments, three types of wind farm and two types of road traffic noise recordings of 20-sec duration were played during established N2 or deeper sleep, each separated by 20 seconds without noise. Each noise sequence also included a no-noise control. Electrocardiogram and finger pulse oximeter recorded pulse wave amplitude changes from the pre-noise onset baseline following each noise exposure and were assessed algorithmically to quantify the magnitude of heart rate and finger vasoconstriction responses to noise exposure. Results Higher sound pressure levels were more likely to induce drops in pulse wave amplitude. Sound pressure levels as low as 39 dBA evoked a pulse wave amplitude response (Odds ratio [95% confidence interval]; 1.52 [1.15, 2.02]). Wind farm noise with amplitude modulation was less likely to evoke a pulse wave amplitude response than the other noise types, but warrants cautious interpretation given low numbers of replications within each noise type. Conclusion These preliminary data support that drops in pulse wave amplitude are a particularly sensitive marker of noise-induced cardiovascular responses during. Larger trials are clearly warranted to further assess relationships between recurrent cardiovascular activation responses to environmental noise and potential long-term health effects.

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Abstract P294: Greater Peripheral Vasoconstriction During Mental Stress Predicts Adverse Cardiovascular Outcomes

Circulation ◽

10.1161/circ.137.suppl_1.p294 ◽

2018 ◽

Vol 137 (suppl_1) ◽

Author(s):

Jeong Hwan Kim ◽

Muhammad Hammadah ◽

Ibhar Al Mheid ◽

Kobina Wilmot ◽

Ronnie Ramadan ◽

...

Keyword(s):

Mental Stress ◽

Wave Amplitude ◽

Pulse Wave ◽

Smoking Status ◽

Left Ventricular ◽

Cardiovascular Outcomes ◽

Peripheral Vasoconstriction ◽

Pulse Wave Amplitude ◽

Digital Pulse ◽

Peripheral Arterial

Introduction: Peripheral arterial vasoconstriction during mental stress (MS) has been associated with mental stress-induced myocardial ischemia, which in turn has been linked with worse cardiovascular outcomes. It is unknown whether the magnitude of peripheral vasoconstriction with MS is predictive of long term outcomes. Hypothesis: We hypothesized that greater peripheral arterial vasoconstriction during MS would be associated with adverse events among patients with coronary artery disease (CAD). Methods: Four hundred sixty-three patients with stable CAD and normal left ventricular function, (age 63±9, 75% male, 27% Black, EF 60±8 %) underwent MS testing with a standardized public speaking stressor. Digital pulse wave amplitude was continuously measured at baseline and during MS using peripheral arterial tonometry (PAT), and the PAT ratio of pulse wave amplitude (during mental stress/ baseline) was calculated. Cox proportional hazard models were calculated to examine the association between the PAT ratio and outcomes. Results: Median PAT ratio during MS was 0.68, indicating 32% average constriction with MS compared to rest. Subjects with greater peripheral constriction [low (<median) PAT ratio] were more likely to be male (80% vs. 70%, P=0.008) compared to those with PAT ratio ≥median, but their risk factor profiles were similar. During 2.8±0.5 year follow-up, 64 patients had adverse cardiac events including 7 cardiovascular deaths, 19 MI, and 54 revascularization events. After adjusting for age, sex, race, hypertension, diabetes, current smoking status, and prior MI, those with low PAT ratio had a greater risk of CV death/MI (HR[hazard ratio] 2.49, 95% CI [1.04-5.99]) and CV death/MI/revascularization (HR 1.77, 95% CI [1.03-3.04]) compared to those with high PAT ratio. Conclusion: Greater peripheral arterial vasoconstriction with MS is associated with a higher risk of adverse cardiovascular outcomes in patients with CAD.

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Automotive traffic noise and urban public spaces

Revista Nacional de Gerenciamento de Cidades ◽

10.17271/2318847297220212964 ◽

2021 ◽

Vol 9 (72) ◽

Author(s):

Greicikelly Gaburro Paneto ◽

Cristina Engel de Alvarez ◽

Paulo Henrique Trombetta Zannin

Keyword(s):

Urban Space ◽

Sound Pressure ◽

Traffic Noise ◽

Motor Vehicles ◽

Open Spaces ◽

Sound Levels ◽

Measurement Results ◽

Sound Pressure Levels ◽

High Sound

In contemporary cities, and usually without realizing it, the population has been exposed to high sound pressure levels, which besides causing discomfort, can lead to health problems. Considering that a large part of this noise comes from emission from motor vehicles, this research aims to evaluate the sound behavior in sound environments configured by voids in the urban fabric, in order to identify whether open spaces can act as attenuators of sound levels. To obtain the expected results, the methodology used was structured from a review of the state-of-the-art and computer simulations relating the variables that influence the formation of urban space and sound emission and propagation, taking as a case study an urban portion of the municipality of Vitória/ES. In parallel, questionnaires were applied to evaluate the user's perception of their exposure. The measurement results indicated that the sound pressure levels caused by traffic noise are above the limit tolerated limit by the NBR norm 10151:2000 for the daytime period. In turn, the results obtained from the population indicated that there is little perception of noise by the users of the spaces surveyed.

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Landscape depressions can create silent zones in noise polluted parks

INTER-NOISE and NOISE-CON Congress and Conference Proceedings ◽

10.3397/in-2021-2170 ◽

2021 ◽

Vol 263 (4) ◽

pp. 2550-2554

Author(s):

Timothy Van Renterghem ◽

Pieter Thomas ◽

Dick Botteldooren

Keyword(s):

Sound Pressure Level ◽

Sound Pressure ◽

Noise Exposure ◽

Road Traffic ◽

Traffic Noise ◽

Pressure Level ◽

Road Traffic Noise ◽

Efficient Measure ◽

Natural Means

Excessive road traffic noise exposure in (sub)urban parks hinders its restorative function and will negatively impact the number of visitors. Especially in such green environments, noise abatements by natural means, well integrated in the landscape, are the most desired solutions. Although dense vegetation bordering the park or raised berms could come first in mind, local landscape depressions are typically underused. In this work, a case-study of a small suburban park, squeezed in between two major arterial roads, is analyzed. The spatially dependent road traffic noise exposure in the park is assessed in detail by mobile sound pressure level measurements. Local reductions of up to 6-7 dBA are found at landscape depressions of only a few meters deep. It can therefore be concluded that this is an efficient measure and should be added to the environmental noise control toolbox for noise polluted parks.

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Prediction of noise from wind turbines: theoretical and experimental study

Revista Facultad de Ingeniería Universidad de Antioquia ◽

10.17533/udea.redin.n90a04 ◽

2018 ◽

pp. 34-41 ◽

Cited By ~ 1

Author(s):

Carlos Alberto Echeverri-Londoño ◽

Alice Elizabeth González Fernández

Keyword(s):

Wind Turbines ◽

Wind Farm ◽

Sound Pressure ◽

Prediction Method ◽

Wide Band ◽

Propagation Models ◽

Low Frequencies ◽

High Frequencies ◽

Wind Speeds ◽

Sound Pressure Levels

Several noise propagation models used to calculate the noise produced by wind turbines have been reported. However, these models do not accurately predict sound pressure levels. Most of them have been developed to estimate the noise produced by industries, in which wind speeds are less than 5 m/s, and conditions favor its spread. To date, very few models can be applied to evaluate the propagation of sound from wind turbines and most of these yield inaccurate results. This study presents a comparison between noise levels that were estimated using the prediction method established in ISO 9613 Part 2 and measured levels of noise from wind turbines that are part of a wind farm currently in operation. Differences of up to 56.5 dBZ, with a median of 29.6 dBZ, were found between the estimated sound pressure levels and measured levels. The residual sound pressure levels given by standard ISO 9613 Part 2 for the wind turbines is larger for high frequencies than those for low frequencies. When the wide band equivalent continuous sound pressure level is expressed in dBA, the residual varies between −4.4 dBA and 37.7 dBA, with a median of 20.5 dBA.

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Plethysmographic pulse wave amplitude and future leg arteriosclerosis

Atherosclerosis ◽

10.1016/0021-9150(94)05427-k ◽

1995 ◽

Vol 113 (1) ◽

pp. 55-62 ◽

Cited By ~ 6

Author(s):

M Ögren

Keyword(s):

Wave Amplitude ◽

Pulse Wave ◽

Pulse Wave Amplitude

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0860 Pulse Wave Amplitude Drops During Sleep: Reference Values And Clinical Associations In A General Population

SLEEP ◽

10.1093/sleep/zsz067.858 ◽

2019 ◽

Vol 42 (Supplement_1) ◽

pp. A345-A345

Author(s):

Camila Hirotsu ◽

Pedro Marques-Vidal ◽

Peter Vollenweider ◽

Monica Betta ◽

Giulio Bernardi ◽

...

Keyword(s):

General Population ◽

Reference Values ◽

Wave Amplitude ◽

Pulse Wave ◽

Pulse Wave Amplitude ◽

Clinical Associations

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Effect of heat-induced pain stimuli on pulse transit time and pulse wave amplitude in healthy volunteers

Physiological Measurement ◽

10.1088/0967-3334/37/1/52 ◽

2015 ◽

Vol 37 (1) ◽

pp. 52-66 ◽

Cited By ~ 4

Author(s):

Marit H N van Velzen ◽

Arjo J Loeve ◽

Minke C Kortekaas ◽

Sjoerd P Niehof ◽

Egbert G Mik ◽

...

Keyword(s):

Healthy Volunteers ◽

Transit Time ◽

Wave Amplitude ◽

Pulse Wave ◽

Pulse Transit Time ◽

Pulse Wave Amplitude ◽

Pain Stimuli

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Assessment of Environmental Noise and Air Quality in Critical Areas at UiTM Engineering Complex

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.471.125 ◽

2013 ◽

Vol 471 ◽

pp. 125-129

Author(s):

N.V. David ◽

K. Ismail

Keyword(s):

Air Quality ◽

Sound Pressure ◽

Quality Measurement ◽

Environmental Noise ◽

Sound Level ◽

Public Parks ◽

Noise Sources ◽

Critical Areas ◽

Sound Levels ◽

Sound Pressure Levels

Excessive environmental noise and poor air quality can be adverse to human health, living comfort and the environment itself. Measurement of sound pressure levels and air quality in critical areas including libraries, campus areas, public parks and hospitals thus becomes necessary to monitor and mitigate existing noise levels. In a university environment, student activities will be less disrupted if the locations of the activities are sufficiently away from noise sources. The present study is intended to measure sound levels and air quality around the Engineering Complex, Universiti Teknologi Mara, Shah Alam. The measured data is compared with to acceptable sound pressure levels and air quality index specified by the Department of Environment (DOE), Malaysia. Sound pressure levels are measured using the Castle Sound Level Meter Type 6224 and air quality measurement was done by using the BW Gas Alert MicroClip XT device. Both measurements were conducted at five selected stations around the Engineering Complex for three times each weekday for five weeks. Results obtained indicated that sound levels at some locations and time zones are above the thresholds recommended by the DOE. The air quality is acceptable in most locations except the vicinity of a bus stop. With the growing number of students in the university and other factors like construction and redevelopment of existing roads, a continuously increasing noise situations and air pollution proportional to the traffic flow is inevitable.

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Reactions to Cold Exposure Emphasize the Need for Weather Protection in Prehospital Care: An Experimental Study

Prehospital and Disaster Medicine ◽

10.1017/s1049023x00003940 ◽

2006 ◽

Vol 21 (5) ◽

pp. 316-320 ◽

Cited By ~ 7

Author(s):

Niina S. Lintu ◽

M. Health ◽

Matti A.K. Mattila ◽

Jaana A. Holopainen ◽

Mari Koivunen ◽

...

Keyword(s):

Tympanic Membrane ◽

Cold Exposure ◽

Room Temperature ◽

Wave Amplitude ◽

Pulse Wave ◽

Prehospital Care ◽

Emg Activity ◽

Pulse Wave Amplitude ◽

Vital Functions ◽

Skin Temperatures

AbstractIntroduction:Exposure to cold temperature is a serious but often neglected problem in prehospital care. It not only is an uncomfortable, subjective experience, but it also can cause severe disturbances in vital functions, gradually leading to hypothermia.Objective:The aim of this study was to examine healthy subjects'physiological and subjective reactions to cold exposure (30 minutes at -5°C in the a climatic chamber) while they were lying in a protective covering.Methods:Healthy volunteers (n = 20) participated in the experiment, which consisted of a 10-minute stabilization period of vital functions at room temperature (23°C), 30 minutes of cold exposure (-5°C), and a 30-minute recovery period at room temperature. Subjects lay supinely in protective covering during the entire experiment. Skin temperatures, oxygen saturation, pulse rates, pulse wave amplitude in the middle finger, and surface electromyography (EMG) activity of the major pectoral muscle were recorded continuously during the test. Before and immediately after the cold exposure, tympanic membrane temperatures were measured. In addition, subjects were asked to estimate cold using a standard scale.Results:During the cold exposure, the decrease in tympanic membrane temperature was not significant.The pulse wave amplitude in the finger decreased sharply upon entering the cold chamber. Skin temperatures, especially of the fingers and toes, decreased during the cold exposure.There were no clear signs of shivering in electromyographic recordings. Subjective cold feelings followed decreasing skin temperatures. Skin temperatures did not return quickly. Even 30 minutes after the exposure, all the skin temperatures still had not returnedto normal levels.However, subjective cold feeling was relieved immediately.Conclusions:Cold exposure provoked immediate protective vasoconstriction in the peripheral compartment, which caused linear decreases of local skin temperatures. This probably was triggered from the unprotected face and upper respiratory areas.

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