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 THICKNESS INFLUENCE ON ABSORBING PROPERTIES OF STRATIFIED COMPOSITE MATERIALS

2015 ◽  
Vol 21 (4) ◽  
pp. 28-34
Author(s):  
IULIANA IAȘNICU (STAMATE) ◽  
OVIDIU VASILE ◽  
RADU IATAN
Keyword(s):  
Composite Material ◽  
Sound Pressure ◽  
Layered Composite ◽  
Sound Level ◽  
Pressure Level ◽  
Sound Level Meter ◽  
Absorbing Materials ◽  
Absorbing Material ◽  
Study Case ◽  
Level Meter

Plates known as sound absorbing materials: textiles recovered fabrics plus polyethylene are made layered composite material intended to be used to encapsulate industrial engines, as sources of noise in the production departments. Influence of thickness sound-absorbing material can be supported by the values obtained for the absorption coefficient, but it can be studied as a study case in the anechoic chamber, where the sound pressure level is measured with a sound level meter. Cases captured: a free engine; the engine placed in a metallic cube and motor inserted; metal cube that was doubled separately with one material and then with the composite material proposed. For each situation are eight determinations on the perimeter of a circle with a radius of one meter from the source of the noise. Plot a graph of experimental results that support the idea: greater thickness of the layer of material will cause a better absorption of noise.

The Use of Sound Level Meter Apps in the Clinical Setting

2016 ◽  
Vol 25 (1) ◽  
pp. 14-28 ◽  
Author(s):  
Gaetano Fava ◽  
Gisele Oliveira ◽  
Melody Baglione ◽  
Michael Pimpinella ◽  
Jaclyn B. Spitzer
Keyword(s):  
Clinical Setting ◽  
Sound Pressure ◽  
Sound Level ◽  
Healthy Adults ◽  
Anechoic Chamber ◽  
Fort Worth ◽  
Sound Level Meter ◽  
Pure Tones ◽  
Level Meter

PurposeThe purpose of this study was to compare sound level meter (SLM) readings obtained using a Larson-Davis (Depew, NY) Model 831 Type 1 SLM, a RadioShack (Fort Worth, TX) SLM, and iPhone 5 (Apple, Cupertino, CA) SLM apps.MethodIn Procedure 1, pure tones were measured in an anechoic chamber (125, 250, 500, 1000, 2000, 4000, and 8000 Hz); sound pressure levels (SPLs) ranged from 60 to 100 dB SPL in 10-dB increments. In Procedure 2, human voices were measured. Participants were 20 vocally healthy adults (7 women, 13 men; mean age = 25.1 years). The task was to sustain a vowel “ah” at 3 intensity levels: soft, habitual, and loud. Microphones were lined up equal distances from the participant's mouth, and recordings were captured simultaneously.ResultsOverall, the 3 SLM apps and the RadioShack SLM yielded inconsistent readings compared with the Type 1 SLM.ConclusionThe use of apps for SPL readings in the clinical setting is premature because all 3 apps adopted were incomparable with the Type 1 SLM.

scholarly journals Noise Level Status in Siddharthanagar Municipality, Rupandehi, Nepal

2015 ◽  
Vol 5 ◽  
pp. 69-74
Author(s):  
Lakshmi Nath Bhattarai
Keyword(s):  
Noise Level ◽  
Sound Level ◽  
Sound Level Meter ◽  
Noise Levels ◽  
Medical College ◽  
Commercial Area ◽  
Human Hearing ◽  
Level Meter ◽  
High Level ◽  
Digital Sound

Undesirable sound for human hearing is called as noise. It was measured at the selected locations of silent, residential and commercial zones of Siddharthanagar Municipality by using Dick Smith Digital Sound Level Meter Q 1362 for ‘A’ weighting in day time at 9:00 AM to 6:00 PM in the month of November and December 2012. The result shows that at each location the Leq noise levels are above than the noise level standard prescribed by Government of Nepal and WHO. Maximum Leq of 81.9 dB(A) was observed at the Bus park of commercial area and minimum 54.5 dB(A) was observed at Medical College area of silent zone. In other places, the Leq lie in the range 56.2 dB(A) to 81.9 dB(A). The study showed that the places lying along highways have high level of noise which is due to bad condition of roads, vehicles and unnecessary use of horns  The Himalayan Physics Vol. 5, No. 5, Nov. 2014 Page: 69-74

scholarly journals The assessment of the sawmill noise

2013 ◽  
Vol 44 (2s) ◽  
Author(s):  
P. D’Antonio ◽  
C. D’Antonio ◽  
C. Evangelista ◽  
V. Doddato
Keyword(s):  
Data Processing ◽  
Sound Pressure Level ◽  
Noise Level ◽  
Sound Pressure ◽  
Sound Level ◽  
Pressure Level ◽  
Published Data ◽  
Noise Levels ◽  
Different Types ◽  
Level Meter

Noise is a serious and widespread problem in many workplaces like in sawmill. The published data for the year 2010 about the total number of pathologies from work in Italia due to the noise, showed 5222 cases divided by sex, in fact for females there are instances in number of 221 while the male has a number of cases is equal to 4961. The aim of this work was to detect the sound level caused by the use of the machineries in a sawmill. The measurements were carried out through an instrument known as noise level meter, equipped with a microphone and connected to a computer for data processing and analysis of variance to a factor in excel, and able to assess noise levels at any particular point in the mill. The machines were subjected in relief and with several different types of wood materials. Obviously, in our case a fundamental role takes the moisture of wood. The drying operation is intended to obtain that degree of humidity of the wood, generally it must be between 7 and 16%, compatible with the type of glue used and, above all, appropriate to the target structures. The machines that have the highest sound pressure levels were trimmer and profiler, with values ranging between 85 dB(A) and 110 dB(A). Finally, it’s possible conclude that the sound pressure level increases when the aspiration equipment is turned on, the noise of machinery decreases during the processing of wood and that, increasing the thickness, decreased the noise emitted by the machine.

scholarly journals Noise Levels Along the Palembang–Indralaya Highway

2019 ◽  
Vol 10 (3) ◽  
pp. 184-190
Author(s):  
Mona Lestari ◽  
Desheila Andarini ◽  
Dwi Septiawati ◽  
Poppy Fujianti ◽  
Novrikasari
Keyword(s):  
Noise Level ◽  
Noise Intensity ◽  
Motor Vehicle ◽  
Quality Standards ◽  
High Volume ◽  
Sound Level ◽  
Sound Level Meter ◽  
The Road ◽  
Vehicle Activity ◽  
Level Meter

Palembang – Indralaya highway is a cross-provincial road where motor vehicle activity is constant, causing noise and affecting settlements along the road. Constant exposure to the noise that exceeds quality standards (55 dB) stipulated in Environmental Ministerial Decree (KEP.48/MENLH/11/1996), can cause a variety of health problems, such as hearing loss and psychological disorders. Therefore, this study is conducted to determine the noise level along the Palembang-Indralaya road. This study used an observational approach through direct observations and measurements using the Mini InScienPro SQ-100 sound level meter. The noise level is measured at two locations, i.e., on the curb and in houses located along the highway. Based on the observations and measurements, the highest noise intensity was during the daytime (78.0 - 102.4 dB). The highest intensity of noise inside and outside the house are 74 and 90 dB, respectively. This is due to the high volume and activity of vehicles crossing the highway. The intensity of the noise received by the residents along the highway is above the quality standards, so as to handle the noise, trees need to be planted around the housing (barrier plants). Keywords: Noise intensity, highway, sound level Meter

scholarly journals THICKNESS INFLUENCE ON ABSORBING PROPERTIES OF STRATIFIED COMPOSITE MATERIALS

2016 ◽  
Vol 21 (4) ◽  
Author(s):  
IAȘNICU (STAMATE) IULIANA ◽  
VASILE OVIDIU ◽  
IATAN RADU
Keyword(s):  
Composite Material ◽  
Sound Pressure ◽  
Layered Composite ◽  
Sound Level ◽  
Pressure Level ◽  
Sound Level Meter ◽  
Absorbing Materials ◽  
Absorbing Material ◽  
Study Case ◽  
Level Meter

Plates known as sound absorbing materials: textiles recovered fabrics plus polyethylene are made layered composite material intended to be used to encapsulate industrial engines, as sources of noise in the production departments. Influence of thickness sound-absorbing material can be supported by the values obtained for the absorption coefficient, but it can be studied as a study case in the anechoic chamber, where the sound pressure level is measured with a sound level meter. Cases captured: a free engine; the engine placed in a metallic cube and motor inserted; metal cube that was doubled separately with one material and then with the composite material proposed. For each situation are eight determinations on the perimeter of a circle with a radius of one meter from the source of the noise. Plot a graph of experimental results that support the idea: greater thickness of the layer of material will cause a better absorption of noise.

scholarly journals Assessment of Noise Pollution in Different Hatbazars of Butwal City, Rupandehi, Nepal

2017 ◽  
pp. 61-64
Author(s):  
Kamal Bahadur Rayamajhi
Keyword(s):  
Noise Level ◽  
Noise Pollution ◽  
Sound Level ◽  
Sound Level Meter ◽  
Specific Time ◽  
Noise Levels ◽  
Metropolitan City ◽  
Commercial Activities ◽  
Level Meter ◽  
Digital Sound

The study was carried out to ascertain the level of noise pollution at five different hatbazars (periodic markets) of Butwal Sub-Metropolitan city by using Dick Smith Digital Sound Level Meter Q 1362 in the specific time from 4:00 PM to 5:00PM in the month of June 2016 on a hatbazar day and a usual day. The result shows that the heighest Leq of 79.8 dB(A) was observed on hatbazar day at Butwal hatbazar. However, on non hatbazar day the highest Leq of 71.9 dB(A) was observed at Purano bus park hatbazar. The lowest Leq of 64.9 dB(A) and 54.6 dB(A) were respectively observed on hatbazar day and non hatbazar day at Majhagaun hatbazar. The study shows that the noise level was found to be higher on hatbazar day as compared to non hatbazar day in all sampling sites. The commercial activities, crowd of people, unnecessary advertisement of goods, blasting of horns increase noise levels in hatbazars.The Himalayan Physics Vol. 6 & 7, April 2017 (61-64)

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