Specification for sound level meters for the measurement of noise emitted by motor vehicles

1986 ◽  
Keyword(s):  
Sound Level ◽  
Motor Vehicles

Noise pollution in old and new urban fabric with focus on traffic flow

2016 ◽  
Vol 35 (4) ◽  
pp. 257-263 ◽  
Author(s):  
Mohammad R Monazzam ◽  
Vahideh Abolhasannejad ◽  
Bibi Narjes Moasheri ◽  
Vahid Abolhasannejad ◽  
Hamid Kardanmoghaddam
Keyword(s):  
Traffic Flow ◽  
Urban Areas ◽  
Statistical Tests ◽  
Noise Pollution ◽  
Sound Level ◽  
Motor Vehicles ◽  
Noise Levels ◽  
Urban Fabric ◽  
Factors Affecting ◽  
The Mean

Noise pollution is considered as one of the effective factors affecting people’s quality of life in urban areas throughout the world. Traffic is a major source of noise in urban areas with wide ranging effects on human. The present study aims to determine the mean of noise levels in old and new urban fabric and their relationship with the traffic flow. Acoustic survey was performed during one week in each month of the summer in assigned stations. In this investigation, using a sound level meter and BS 7445-1-2003, BS 7445-3-1991, Leq10 min was measured and the percentage of highly annoyed people was estimated. The data were analyzed by using statistical tests and SPSS software. The results show that the mean of noise levels measured in all stations during the three months of the summer was higher than the standard limit. The relationship between the mean of noise level and the traffic flow in areas in new fabric was significant but not in those in old fabric. Higher rates of noise pollution in old fabrics and lack of significant relationship with the traffic flow in those points show that noise pollution can be reduced in the city to a great extent by considering effective traffic rules, widening crowded streets, and improving those conditions that govern urbanization. Of course, the amount of the porosity of asphalt, bumpy streets, and even technical defect of motor vehicles should not be ignored.

scholarly journals KAJIAN PENERAPAN SENSOR MIC-CONDENSER DALAM RANCANG BANGUN SOUND LEVEL METER DIGITAL.

JURNAL ELTEK ◽  
2018 ◽  
Vol 16 (1) ◽  
pp. 86
Author(s):  
Achmad Komarudin ◽  
Hariyadi Singgih ◽  
Moh. Luqman
Keyword(s):  
Data Processing ◽  
Sound Pressure ◽  
Motor Vehicle ◽  
Sound Level ◽  
Motor Vehicles ◽  
Sound Level Meter ◽  
Vehicle Exhaust ◽  
Sound Sources ◽  
Level Meter ◽  
Digital Sound

Noise levels in the industrial and urban streets have a threshold value that has been determined by the Regulation of the State Minister of the Environment Number 07 Year 2009 for motor vehicles. And Minister of Manpower Number: KEP-51 / MEN / 1999 for industrial environment. To know the value of noise is required a Digital Level Sound Meter gauge that can be used as a measuring instrument of sound intensity noise value of motor vehicle exhaust and other sound sources. This tool can change the amount of sound pressure converted in LCD display. This Digital Sound Level Meter is used to measure the feasibility of thresholds on exhaust and other sound sources. The purpose of this research is to study the application of Mic-condenser sensors in Digital Sound Level Meter design The research method is to design and design the system, using mic condenser sensor, designing signal conditioner using op-amp with series of Absolute Value Modulus (MAV), which can rectify AC voltage into DC using Microkontroller ATMega 8535 as data processing result of data processing which has become the quantity sound pressure with decibels (dBA) is presented in LCD devices The results of the system test show that this Digital Sound Level Meter can run and can display the sound pressure level captured by the mic condenser sensor, and from the result of the Digital Sound Level Meter test compared to the comparison tool obtained an error of 2.94%.

scholarly journals Spatio-Temporal Analysis of Environmental Noise in Institutional Area

2019 ◽  
Vol 8 (2) ◽  
pp. 4037-4042
Keyword(s):  
Correlation Coefficient ◽  
Strong Correlation ◽  
Noise Level ◽  
Noise Exposure ◽  
Temporal Analysis ◽  
Environmental Noise ◽  
Sound Level ◽  
Motor Vehicles ◽  
Noise Mapping ◽  
Spearman’S Correlation

Environmental noise is identified as unwanted sound arises mainly from motor vehicles. The increasing number of motor vehicles in institutional area would negatively affect the environment and students learning process. This study assesses the variability of environmental noise in institutional area in terms of temporal and spatial analysis. Noise level was taken in Universiti Malaysia Terengganu (UMT) campus by using sound level meter at varying time intervals of 0700hrs - 1000hrs (morning), 1100hrs – 1400hrs (afternoon) and 1500hrs – 1800hrs (evening) and noise mapping was constructed by using Surfer14® and SketchUp® software. Lmax (78.8 dBA, weekday (WD) and 84.4 dBA, weekend (WK)), LAeq (75.0 dBA, WD and 75.5 dBA, WK), Lmin (43.9 dBA, WD and 41.3 dBA, WK), L10 (66.8 dBA, WD and 58.5 dBA, WK) and L90 (47.5 dBA, WD and 44.4 dBA, WK) were evaluated. Motor vehicles from Class M (cars and buses) shows strong correlation with noise level (Spearman’s correlation coefficient, r=0.74, p<0.01, WD) while Class L (motorcycle) shows strong correlation (Spearman’s correlation coefficient r=0.59, p<0.01, WK). The finding from this study is important for UMT management team to control noise pollution in campus in line to reduce noise exposure towards university students and staff

scholarly journals A Study of The Density of Motor Vehicles In Front of Bunda Hospital Margonda Depok Against Noise Pollution

2020 ◽  
Vol 3 (2) ◽  
pp. 45-67
Author(s):  
Syaiful Syaiful ◽  
Noor Wahid
Keyword(s):  
Public Transport ◽  
Noise Pollution ◽  
Sound Level ◽  
Motor Vehicles ◽  
Pollution Level ◽  
Population Mobility ◽  
Private Car ◽  
R Value ◽  
Level Meter ◽  
The City

Depok became a pilot as an orderly city with traffic arrangements and diverse patterns of population movement. The diversity of the city residents' trips has resulted in an increasingly diverse population passing through the region. Population mobility also requires adequate transportation facilities and infrastructure. This study aims to obtain traffic data and the level of noise pollution caused by the speed of motor vehicles (SPM, MP, MAU) in front of the Bunda Hospital Margonda Depok. The calculation and analysis obtained are on the equation with the first largest R value on the second day of the third point study (Sound Level Meter 3), with a contribution of 50.50%. As equation, y = 73.824 + 0.030x1 - 0.020x2 - 0.324x3, the addition of motorcycle density is 0.030 and the reduction in private car density and public transport car density is 0.344, the noise pollution level will be reduced by 0.314 dBA in SLM3. The second largest R value with motorcycle density, private car density and public transport car density has a moderate effect on noise pollution in the second day of the research point (Sound Level Meter2) with a contribution of 48.50%.

New EU regulation on the sound level of motor vehicles

2014 ◽  
Vol 22 (1) ◽  
pp. 8-17
Author(s):  
Foort de Roo ◽  
Pieter J.G. van Beek
Keyword(s):  
Sound Level ◽  
Motor Vehicles ◽  
Eu Regulation

Long-term variations in individual particle types in the aerosol of Phoenix, Arizona, as determined using automated electron microprobe analysis and multivariate statistical techniques

1993 ◽  
Vol 51 ◽  
pp. 742-743
Author(s):  
Karen A. Katrinak ◽  
James R. Anderson ◽  
Peter R. Buseck
Keyword(s):  
Electron Microprobe ◽  
Fine Fraction ◽  
Coarse Fraction ◽  
Motor Vehicles ◽  
Multivariate Statistical Methods ◽  
Multivariate Statistical ◽  
X Ray ◽  
Mineral Particles ◽  
Anthropogenic Air Pollutants

Aerosol samples were collected in Phoenix, Arizona on eleven dates between July 1989 and April 1990. Elemental compositions were determined for approximately 1000 particles per sample using an electron microprobe with an energy-dispersive x-ray spectrometer. Fine-fraction samples (particle cut size of 1 to 2 μm) were analyzed for each date; coarse-fraction samples were also analyzed for four of the dates.The data were reduced using multivariate statistical methods. Cluster analysis was first used to define 35 particle types. 81% of all fine-fraction particles and 84% of the coarse-fraction particles were assigned to these types, which include mineral, metal-rich, sulfur-rich, and salt categories. "Zero-count" particles, consisting entirely of elements lighter than Na, constitute an additional category and dominate the fine fraction, reflecting the importance of anthropogenic air pollutants such as those emitted by motor vehicles. Si- and Ca-rich mineral particles dominate the coarse fraction and are also numerous in the fine fraction.

Quantifying Vocal Power: Correlation of Whole-Body Anaerobic Power to Vocal Function Measures

2020 ◽  
Vol 63 (8) ◽  
pp. 2597-2608
Author(s):  
Emily N. Snell ◽  
Laura W. Plexico ◽  
Aurora J. Weaver ◽  
Mary J. Sandage
Keyword(s):  
Fundamental Frequency ◽  
Forced Vital Capacity ◽  
Vital Capacity ◽  
Anaerobic Power ◽  
Performance Outcomes ◽  
Sound Level ◽  
Whole Body ◽  
Vocal Function ◽  
Laryngeal Diadochokinesis ◽  
High Sound

Purpose The purpose of this preliminary study was to identify a vocal task that could be used as a clinical indicator of the vocal aptitude or vocal fitness required for vocally demanding occupations in a manner similar to that of the anaerobic power tests commonly used in exercise science. Performance outcomes for vocal tasks that require rapid acceleration and high force production may be useful as an indirect indicator of muscle fiber complement and bioenergetic fitness of the larynx, an organ that is difficult to study directly. Method Sixteen women (age range: 19–24 years, M age = 22 years) were consented for participation and completed the following performance measures: forced vital capacity, three adapted vocal function tasks, and the horizontal sprint test. Results Using a within-participant correlational analyses, results indicated a positive relationship between the rate of the last second of a laryngeal diadochokinesis task that was produced at a high fundamental frequency/high sound level and anaerobic power. Forced vital capacity was not correlated with any of the vocal function tasks. Conclusions These preliminary results indicate that aspects of the laryngeal diadochokinesis task produced at a high fundamental frequency and high sound level may be useful as an ecologically valid measure of vocal power ability. Quantification of vocal power ability may be useful as a vocal fitness assessment or as an outcome measure for voice rehabilitation and habilitation for patients with vocally demanding jobs.

Promoting Hearing Loss Prevention in Audiology Practice

2012 ◽  
Vol 13 (1) ◽  
pp. 3-19 ◽  
Author(s):  
David C. Byrne ◽  
Christa L. Themann ◽  
Deanna K. Meinke ◽  
Thais C. Morata ◽  
Mark R. Stephenson
Keyword(s):  
Hearing Loss ◽  
Sound Level ◽  
Health Campaigns ◽  
Loss Prevention ◽  
Hearing Conservation ◽  
Prevention Services ◽  
Occupational Programs ◽  
Strategic Position ◽  
Public Health Campaigns ◽  
Self Protection

An audiologist should be the principal provider and advocate for all hearing loss prevention activities. Many audiologists equate hearing loss prevention with industrial audiology and occupational hearing conservation programs. However, an audiologist’s involvement in hearing loss prevention should not be confined to that one particular practice setting. In addition to supervising occupational programs, audiologists are uniquely qualified to raise awareness of hearing risks, organize public health campaigns, promote healthy hearing, implement intervention programs, and monitor outcomes. For example, clinical audiologists can show clients how to use inexpensive sound level meters, noise dosimeters, or phone apps to measure noise levels, and recommend appropriate hearing protection. Audiologists should identify community events that may involve hazardous exposures and propose strategies to minimize risks to hearing. Audiologists can help shape the knowledge, beliefs, motivations, attitudes, and behaviors of individuals toward self-protection. An audiologist has the education, tools, opportunity, and strategic position to facilitate or promote hearing loss surveillance and prevention services and activities. This article highlights real-world examples of the various roles and substantial contributions audiologists can make toward hearing loss prevention goals.

Sign in / Sign up

Export Citation Format

Share Document