Traffic Noise Annoyance in the Population of North Mexico: Case Study on the Daytime Period in the City of Matamoros

Aim: The presence of noise in urban environments is rarely considered a factor that causes damage to the environment. The primary generating source is transportation means, with vehicles being the ones that affect cities the most. Traffic noise has a particular influence on the quality of life of those who are exposed to it and can cause health alterations ranging from annoyance to cardiovascular diseases. This study aims to describe the relationship between the traffic noise level and the perceived annoyance in the inhabitants of a city on the Northern Border of Mexico. The work carried out in a city represents the vulnerability characteristics: economic, social, and migratory of its sizable portion of the inhabitants. Due to that, it is impossible to identify precisely the number of residents as the number of vehicles in circulation.Methods: The streets and avenues with an annual average daily traffic of more than 1,000 vehicles were considered for the measurement of traffic noise. The equipment used was a vehicle gauge with non-invasive speed radar; type I integrating sound level meters, with their respective gauges and tripods. A questionnaire was applied to people living within 250 m of the streets and avenues in which the noise was measured.Results: The noise measurement found a parameter of LAeq estimated for 12 h during the day, exceeding 70 dBA. The data received from the questionnaire were statistically tested by using Pearson's correlation tests. A total number of 2,350 people were participated, of whom 1,378 were women (58.6%) and 972 were men (41.4%). The age of participants is ranged from 18 to 75 years. The overall perception of traffic noise annoyance identified that 1,131 participants (48.1%) responded “Yes” as they considered the noise annoying. Participants who responded “No” as well as those who responded “Do not know” resulted in a total of 1,219 people (51.9%).Conclusion: The results show that the population is desensitized to traffic noise and does not perceive it as an annoyance. The flow of vehicles and the type of vehicles are the significant factors for the propagation and increase in the traffic noise levels. Women present a considerable appreciation of traffic noise perception instead of younger people who demonstrate a higher tolerance to high-level exposure. This reflects the lack of information of the population around the noise problem and its effects.

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The influence of a signal’s time structure on the perceived noise annoyance of road traffic noise

Journal of Environmental Health Science and Engineering ◽

10.1007/s40201-021-00655-4 ◽

2021 ◽

Author(s):

Jan Felcyn

Keyword(s):

Road Traffic ◽

Temporal Structure ◽

Traffic Noise ◽

Sound Level ◽

Time Structure ◽

Common Source ◽

Road Traffic Noise ◽

Noise Annoyance ◽

Modern Cities ◽

Negative Feelings

Abstract Purpose Road traffic noise is the most common source of noise in modern cities. The noise indicators used to manage noise do not take into account its temporal structure. However, in cities the traffic flow varies during the day, peaking due to congestion and more fluent periods. In this research we sought to analyze how people (giving answers on a numerical ICBEN scale) perceive noise stimuli with the same LAeqT values but different time structures (more/less noise events, different amplitude envelopes). Methods 31 people with normal hearing took part in an experiment conducted in an anechoic chamber. Participants listened to 18 different noise recordings and rated each of them using the numerical ICBEN scale regarding noise annoyance. Results The results showed that only sound level was a statistically significant factor. However, based on people’s remarks about noise, we can also say that the more intermittent the noise is, the more negative feelings it evokes in people. Conclusions Time structure does not have a significant influence on people’s judgments about noise annoyance. However, people tend to have a preference for a steady noise rather than an intermittent one.

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610. High Level Expression of Human Iduronidase Throughout the Brain in a Murine Model of Mucopolysaccharidosis Type I After Non-Invasive AAV-Mediated Gene Delivery to the CNS

Molecular Therapy ◽

10.1016/s1525-0016(16)35623-4 ◽

2014 ◽

Vol 22 ◽

pp. S236 ◽

Cited By ~ 1

Keyword(s):

Gene Delivery ◽

Murine Model ◽

Type I ◽

Mucopolysaccharidosis Type ◽

Mucopolysaccharidosis Type I ◽

High Level Expression ◽

Non Invasive ◽

High Level ◽

The Brain

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RESEARCH ON EMERGING AND DESCENDING AIRCRAFT NOISE / KYLANČIŲ IR BESILEIDŽIANČIŲ ORLAIVIŲ KELIAMO TRIUKŠMO TYRIMAI

Mokslas - Lietuvos ateitis ◽

10.3846/mla.2013.54 ◽

2013 ◽

Vol 5 (4) ◽

pp. 337-342

Author(s):

Monika Bartkevičiūtė ◽

Raimondas Grubliauskas

Keyword(s):

Negative Impact ◽

Traffic Noise ◽

Aircraft Engine ◽

Sound Level ◽

Aircraft Noise ◽

Large Radius ◽

Sound Levels ◽

Conducting Research ◽

High Level ◽

The Impact

Along with an increase in the aircraft engine power and growth in air traffic, noise level at airports and their surrounding environs significantly increases. Aircraft noise is high level noise spreading within large radius and intensively irritating the human body. Air transport is one of the main sources of noise having a particularly strong negative impact on the environment. The article deals with activities and noises taking place in the largest nationwide Vilnius International Airport.The level of noise and its dispersion was evaluated conducting research on the noise generated by emerging and descending aircrafts in National Vilnius Airport. Investigation was carried out at 2 measuring points located in a residential area. There are different types of aircrafts causing different sound levels. It has been estimated the largest exceedances that occur when an aircraft is approaching. In this case, the noisiest types of aircrafts are B733, B738 and AT72. The sound level varies from 70 to 85 dBA. The quietest aircrafts are RJ1H and F70. When taking off, the equivalent of the maximum sound level value of these aircrafts does not exceed the authorized limits. The paper describes the causes of noise in aircrafts, the sources of origin and the impact of noise on humans and the environment. Article in Lithuanian. Santrauka Padidėjus orlaivių variklių galiai ir daugėjant skrydžių, labai padidėjo oro uostuose ir šalia jų esančiose apylinkėse skleidžiamo triukšmo lygis. Lėktuvo keliamas triukšmas išsiskiria aukštu garso slėgio lygiu bei dideliu spinduliu sklindančiu garsu ir yra labiausiai dirginantis žmogaus organizmą. Orlaivių transportas – vienas pagrindinių triukšmo šaltinių, darantis ypač didelę neigiamą įtaką aplinkai. Nagrinėjamas Tarptautiniame Vilniaus oro uoste kylančių ir tupiančių orlaivių keliamas triukšmas. Triukšmo tyrimai atlikti gyvenamojoje aplinkoje greta oro uosto parinktose matavimo vietose. Pateikiami įvairių orlaivių tipų sukeliamo garso stiprumo – garso slėgio lygiai. Didžiausias leistinųjų verčių viršijimas nustatomas orlaiviams leidžiantis. Triukšmingiausi B733, B738 ir AT72 tipo orlaiviai – garso slėgio lygis 70–85 dBA. Vieni tyliausių orlaivių – RJ1H ir F70. Jiems kylant ekvivalentinės ir maksimalios garso slėgio lygio reikšmės neviršija leidžiamųjų. Aprašomos orlaivių keliamo triukšmo priežastys, kilimo šaltiniai. Nagrinėjamas triukšmo poveikis žmogui ir aplinkai.

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Equivalent sound level as a predictor for road traffic noise annoyance assessment

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

10.3397/in-2021-2777 ◽

2021 ◽

Vol 263 (2) ◽

pp. 4622-4633

Author(s):

Jan Felcyn ◽

Anna Preis

Keyword(s):

Road Traffic ◽

Traffic Noise ◽

Calculated Data ◽

Sound Level ◽

Time Structure ◽

Single Type ◽

Road Traffic Noise ◽

The Road ◽

Noise Annoyance ◽

Sound Levels

Noise annoyance can be rated either in situ or in laboratory conditions. Regarding the , many papers indicate that only 30% of the variance in people's answers can be explained by sound level values. This value increases when a single type of noise is presented to participants in lab. However, the relationship between time structure of the noise stimulus and annoyance rating is still ambiguous. In this study road traffic noise stimuli with different time structure at three different sound levels were created. Moreover, the psychoacoustical characteristics of them were also computed. The calculated data was compared with results of the listening test in which participants rated each stimulus on the numerical ICBEN scale. Analysis showed that loudness and sound level are the dominant factors, they correlate quite well (~70%) with people's ratings. However, the different time structure of the road traffic noise at the same sound level did not evoke significantly different noise annoyance ratings. Since there are no standards available for loudness measurement, the sound level for the same type of noise remains the simplest factor to reliably predict its impact on people regarding noise annoyance.

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A Walk-In Clinic for Newly Arrived Mentally Burdened Refugees: The Patient Perspective

International Journal of Environmental Research and Public Health ◽

10.3390/ijerph18052275 ◽

2021 ◽

Vol 18 (5) ◽

pp. 2275

Author(s):

Catharina Zehetmair ◽

Valentina Zeyher ◽

Anna Cranz ◽

Beate Ditzen ◽

Sabine C. Herpertz ◽

...

Keyword(s):

Mental Health ◽

Help Seeking ◽

Mental Health Problems ◽

Psychosocial Support ◽

Support Service ◽

Psychiatric Medication ◽

Health Issues ◽

Lack Of Information ◽

High Level ◽

Past Experiences

Providing refugees with psychosocial support is particularly important considering the high level of mental health problems prevalent in this population. A psychosocial walk-in clinic operating within a state reception and registration center in Germany has been supporting mentally burdened refugees since 2016. This study focused on patients’ perspectives on their mental health burden, the psychosocial walk-in clinic, and future help seeking. We conducted interviews with n = 22 refugees attending the walk-in clinic from March to May 2019. Qualitative analysis focused on the following four topics: (1) mental burden from the patients’ perspective, (2) access to the psychosocial walk-in clinic, (3) perception of counseling sessions, and (4) perception of follow-up treatment. The results show that the majority of interviewees were burdened by psychological and somatic complaints, mostly attributed to past experiences and post-migratory stress. Therapeutic counseling and psychiatric medication were found to be particularly helpful. Most of the participants felt motivated to seek further psychosocial support. Key barriers to seeking psychosocial help included shame, fear of stigma, and lack of information. Overall, the psychosocial walk-in clinic is a highly valued support service for newly arrived refugees with mental health issues.

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Road traffic noise – the relationship between noise exposure and noise annoyance in Norway

Applied Acoustics ◽

10.1016/j.apacoust.2004.04.001 ◽

2004 ◽

Vol 65 (9) ◽

pp. 893-912 ◽

Cited By ~ 43

Author(s):

R Klæboe ◽

A.H Amundsen ◽

A Fyhri ◽

S Solberg

Keyword(s):

Noise Exposure ◽

Road Traffic ◽

Traffic Noise ◽

Road Traffic Noise ◽

Noise Annoyance ◽

The Relationship

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A note on the traffic noise index and the equivalent sound level

Journal of Sound and Vibration ◽

10.1016/0022-460x(68)90234-4 ◽

1968 ◽

Vol 8 (2) ◽

pp. 298-300 ◽

Cited By ~ 4

Author(s):

I.D. Griffrrhs

Keyword(s):

Traffic Noise ◽

Sound Level ◽

Noise Index

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Measurement of Noise inside the Compartment and Vibration on both Sides of Elastomeric Powertrain Mounts of Passenger Car

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.471.59 ◽

2013 ◽

Vol 471 ◽

pp. 59-63

Author(s):

Mohd Noor Arib Rejab ◽

Roslan Abd Rahman ◽

Raja Ishak Raja Hamzah ◽

Jawaid Iqbal Inayat Hussain ◽

Nazirah Ahmad ◽

...

Keyword(s):

Fast Response ◽

Sound Level ◽

Measurement Noise ◽

The Other ◽

Vibration Level ◽

Test Conditions ◽

Exhaust Noise ◽

Run Up ◽

Level Meter ◽

High Level

This paper presents an evaluation on elastomeric mount used to isolate vibration from powertrain to chassis or structure vehicle. The assessments started with measurement of noise inside compartment, and exhaust noise. This is followed by the measurement of vibration on both sides of elastomeric mounts. The noise in the compartment and exhaust noise is measured according to BS 6086: 1981 and BS ISO 5130: 2007. The noise in the compartment and vibration is tested in three conditions. Firstly, engine is run-up with load (driving at second gear); secondly, without load; and thirdly, without load but hanging. A microphone is fixed at the ear of the mannequin. The fast response and A weighting sound level meter were used for measurement noise in the compartment and exhaust noise. The vibration is measured in terms of acceleration on both sides of each elastomeric powertrain mounts. Two accelerometer transducers are fixed on both sides of powertrain elastomeric mounts. One side was identified as a source of vibration and the other as receiver of vibrations. The results showed that the pattern of overall vibration level on source and receiver increased from 1050 RPM (idling) to 4000 RPM on all test conditions. Vibration transmitted to chassis or receiver structure was analyzed using transmissibility concept. By evaluating test condition of engine run-up without load, informed that the front and rear mounts showed a high level transmissibility contributing to structure-borne noise.

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Experiments with a biological material for the closure of incisional hernias

Laboratory Animals ◽

10.1258/002367787781268828 ◽

1987 ◽

Vol 21 (3) ◽

pp. 195-200 ◽

Cited By ~ 1

Author(s):

M. Walter ◽

U. Brenner ◽

W. Holzmüller ◽

J. M. Müller

Keyword(s):

Collagen Type I ◽

Morphological Properties ◽

Type I ◽

Native Structure ◽

Incisional Hernias ◽

Small Vessels ◽

Collagen Implant ◽

Infiltrating Cells ◽

High Level ◽

Special Case

A new preparation process was studied which should allow the implantation of collagen type I in its native structure in reconstructive surgery, in this special case for closure of incisional hernias. As experimental animals we used 30 female Lewis rats. A defect of the anterior abdominal wall measuring 3 cm × 4 cm was closed with our collagen substitute. Biopsies taken after 4, 6 and 8 weeks were examined morphologically. As criteria for revitalization and revascularization we used the type of infiltrating cells, the depth and density of infiltration and the formation of new blood vessels. After 4 weeks the implants were infiltrated by fibroblasts that decreased in density towards the centre. Good revascularization could be seen on the muscle-implant interface. After 6 weeks the density of infiltrating cells had increased markedly even to the centre of the collagen implant. Sporadically small vessels could be seen. Eight weeks after implantation the density of infiltrated cells was at the same high level, and capillary bundles could be seen within the whole implant. We believe that this collagen implant is suitable for the closure of hernias as shown by its physical and morphological properties. In particular it appears to guarantee an earlier and tighter closure of hernias than other materials.

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