scholarly journals Level of Aviation Noise: Their Effects on the Inhabitants near Francisco Bangoy International Airport

10.17158/478 ◽  
2016 ◽  
Vol 19 (1) ◽  
Author(s):  
Aylmer Ronnel L. Sombilla ◽  
Aaron Paul R. Paciente ◽  
Cristy Marie C. Masalta ◽  
Martin C. Sorolla ◽  
Carlwen Jave J. Pausta ◽  
...  
Keyword(s):  
Noise Pollution ◽  
Sound Level ◽  
Chi Square ◽  
Noise Abatement ◽  
International Airport ◽  
Aviation Noise ◽  
Chi Square Test ◽  
Level Meter ◽  
Degree Of Association ◽  
The Impact

<p>Recognizing the need to assess the impact of noise pollution in vulnerable locations such as the subdivisions in close proximity to the airport, the researchers conducted a survey to characterize how aircraft noise affects the everyday lives of the residents within the perimeter of Francisco Bangoy International Airport of Davao City. Specifically, the investigation determined the levels of aviation noise intensities in dB(A) in four subdivisions surrounding the airport. Moreover, the degrees of effect as regards disturbance of resting time, health, communication, mood, and need for noise abatement of the respondents in the places were also measured. The digital sound level meter was used to measure the aviation noise intensities while a validated researchermade questionnaire was utilized to collect data to characterize many aspects of aviation noiseeffects. Four hundred respondents were randomly chosen from the identified subdivisions. Chi-square test was used to establish the degree of association between the level of aviation noise and its effect. Findings revealed that the noise levels are within 40-60 dB (A) for relatively distant places and 90-110 dB (A) in areas very near the airport. Many aspects of aviation noise have affected the lives of the inhabitants. There was a significant association between the level of aviation noise and the extent of its effect.</p><p> </p><p><strong>Keywords:</strong> Social Science, environmental engineering, aviation noise, inhabitants, noise effects, descriptive survey, Davao City, Philippines</p>

scholarly journals Evaluating of Noise Pollution in the Airside of Imam Khomeini International Airport

2017 ◽  
Vol 11 (6) ◽  
pp. 47
Author(s):  
Shabani Sh. ◽  
Zarei Sh.
Keyword(s):  
Sound Pressure ◽  
Noise Pollution ◽  
Sound Level ◽  
Environmental Standards ◽  
Analysis Method ◽  
Measurement Evaluation ◽  
International Airport ◽  
Level Measurement ◽  
Management Principle ◽  
Level Meter

Detection, measurement and monitoring of environmental pollution are considered as one of the decision basics in the environmental management. Principle planning for solving environmental problems is not possible without reliance to assured measurement with the help of new and powerful systems in monitoring. In this regard the noise pollution of airports is of great importance. In this paper by using device analysis method and utilizing a calibrated sound level meter device, sources of noise pollution recognition, noise and sound pressure level measurement, evaluation and comparison of them with environmental standards, and airside control actions of the Imam Khomeini international airport have been performed and it was showed, that the runway, ground safety and the dock have been respectively the main pollutants, so that noise pollution in the Apron area and runway at night have been 80.7% more than Iran standards and the ground safety site while alarm broadcasting has been 53.1% at daytime and 61.1% at night more than standards and these values for Dock has been 20.88% and also the value of noise pollutants in water refinery sites, watchtower, taxi parking and pilgrim terminals have met standards. Finally some solutions against noise pollution have been proposed.

scholarly journals Noise Pollution in Urban Residential Environments: Evidence from Students’ Hostels in Awka, Nigeria

2021 ◽  
Vol 12 (1) ◽  
pp. 51-62
Author(s):  
Nicholas OBI ◽  
◽  
Joy Sylvia OBI ◽  
Eziyi IBEM ◽  
Dickson NWALUSI ◽  
...  
Keyword(s):  
Urban Areas ◽  
Residential Buildings ◽  
Noise Pollution ◽  
Sound Level ◽  
Noise Levels ◽  
Noise Sources ◽  
Chi Square ◽  
Sound Barriers ◽  
Level Meter ◽  
Area Data

Noise pollution and its concomitant effects on humans and environment has reached dangerous levels in many urban areas across the world. However, very little is known about the sources and effects of noise pollution within students’ hostels in a developing country like Nigeria. This study investigated urban noise pollution in residential neighbourhoods, using the Nnamdi Azikiwe University students’ off-campus accommodation in Awka, southeast Nigeria as the study area. Data were obtained through measurements of noise levels using sound level meter and by conducting a survey to gather feedback from 260 students in the study area. Descriptive statistics and Chi-Square tests were used to analyse the data; the results revealed mean noise levels of 89.8 dB(A) and 46.9 dB(A) during noisy and quiet periods, respectively. The main sources of noise were portable electricity generators, vehicular traffic and loudspeakers used by students and business operators; they were found to have deleterious effects such as low tolerance, headache, anger, lack of concentration and low productivity on the students. The study concludes by noting that to effectively minimize the effects of noise pollution within urban residential neighbourhoods in the study area and beyond, architects and urban planners should engage in proper land use zoning and the application of sound absorbing materials on walls and locating balconies of residential buildings away from noise sources. In addition, vegetation belts and sound barriers of earth mounds or wood, metal or concrete could also be constructed between the sources of noise and residential buildings, especially in the case of roadside communities.

scholarly journals HUBUNGAN ANTARA KEBISINGAN TERHADAP STRES KERJA PADA PEKERJA DI BAGIAN MIXING PT. ELANGPERDANA TYRE INDUSTRY TAHUN 2020

PROMOTOR ◽  
2021 ◽  
Vol 4 (4) ◽  
pp. 338
Author(s):  
Nanda Fitriyani Ainiyyah ◽  
Anissatul Fathimah ◽  
Andi Asnifatima
Keyword(s):  
Sound Level ◽  
P Value ◽  
Sound Level Meter ◽  
Chi Square ◽  
Chi Square Test ◽  
Level Meter ◽  
Tyre Industry

Kebisingan merupakan salah satu faktor bahaya fisik yang sering di jumpai di lingkungan kerja, dimana kebisingan tersebut dapat menyebabkan gangguan psikologis serta stress kerja. Menurut NIOSH (2010), penyakit akibat kebisingan kerja ditemukan pada 17.00 kasus dari 59.100 kasus, yaitu sejumlah 1 dari 9 penyakit akibat kerja yang dilaporkan. Penelitian ini bertujuan untuk mengetahui hubungan antara kebisingan terhadap stress kerja pada pekerja di bagian <em>mixing </em>PT. ElangPerdana  tyre industry. Penelitian ini menggunakan metode kuantitatif deskriptif. Teknik pengambilan sampel menggunakan <em>total sampling </em>dengan jumlah sampel 68 responden. Pengambilan data kebisingan dengan menggunakan alat <em>sound level meter </em>wawancara mendalam mengenai alat pelindung telinga serta penyebaran kuesioner. Analasis data penelitian menggunakan aplikasi statistik dengan menggunakan uji <em>Chi-Square. </em>Diketahui nilai <em>p-value </em>Beban kerja mental (<em>p-value=</em>0,022) artinya <em>p- value</em>&lt;0,05 menunjukan bahwa ada hubungan yang signifikan antara beban kerja mental terhadap stress kerja pada pekerja di bagian <em>mixing</em>. Hasil uji statistik <em>Chi-Square Test </em>diperoleh nilai kebisingan (<em>p-value=</em>0,575), usia (<em>p-value=</em>1,000), tingkat pendidikan (<em>p-value=</em>1,000), masa kerja (<em>p-value=</em>0,680) dari ketiga variable tersebut tidak ada hubungan yang signifikan terhadap stress kerja pada pekerja di bagian <em>mixing </em>PT. Elangperdana Trye Industry, dan hasil penelitian ini menunjukan  51 pekerja (75,0%) tidak mengalami stress kerja dan 17 pekerja (25,0%) mengalami stress kerja. Pengukuran kebisingan pada pekerja di bagian <em>mixing </em>PT. Elangperdana Tyre Industry terdapat 3 titik yang memiliki nilai ambang batas &gt;85 dBA yaitu Feeding CV MIX 2 (93,7 dBA), Mill 2 MIX 2 (89,1 dBA), Cement House (88,1 dBA). Kesimpulan dari penelitian yang memiliki hubungan antara kebisingan terhadap stress kerja yaitu beban kerja mental dan yang tidak memiliki hubungan yaitu, kebisingan, usia, tingkat Pendidikan, dan masa kerja. Saran Melakukan safety talk kepada pekerja sebagai bentuk sosialisasi tentang bahaya kebisingan di tempat kerja kepada pekerja, Tenaga kerja yang bekerja di area bising dapat saling mengawasi, mengingatkan dan menegaskan rekan kerja sehingga dapat membangun kedisiplinan dan konsisten dalam penggunaan Alat Pelindung Telinga.

scholarly journals An epidemiological study to evaluate morbidity patterns among wood workers belonging to unorganized sector

2019 ◽  
Vol 6 (5) ◽  
pp. 2246
Author(s):  
Aritra K. Bose ◽  
Dilip D. Kadam ◽  
Anusha C. P.
Keyword(s):  
Competent Authority ◽  
Sound Level ◽  
Working Environment ◽  
Work Place ◽  
Chi Square ◽  
Validated Questionnaire ◽  
Lower Socioeconomic ◽  
Eye Problems ◽  
Chi Square Test ◽  
Level Meter

Background: Wood workers are predisposed to many occupational diseases. Studying work place environment and its association with the morbidities would provide practical insights to promote the health and prevent disease in wood workers. Present study intends to study the epidemiological determinants of health and morbidity in wood workers.Methods: Quantitative method of research is used. All One hundred and five wood workers in the study area were recruited after taking informed consent. A semi-structured, pre-validated, questionnaire consisting of questions on sociodemographic profile, working pattern, morbidities experienced and working environment was prepared. Data was collected using one to one interview at their workplace. Environmental factors like iIllumination (In LUX) and noise level (in db) at the work place was measured using a Lux meter and sound level meter respectively. Association between different variables were analysed using Chi-square test or t-test wherever applicable.Results: Participants were all male belonging to economically productive age group. They were predominantly Muslims, belonging to lower socioeconomic status. Morbidities experienced by the wood workers were musculoskeletal pain (52%), skin problems (57%), eye problems (57.14%) and ear problems (32.38%). Inadequate illumination (<100 LUX) and noise levels more than 90 db were significantly associated with increased accidents and ear morbidities respectively.Conclusions: Poor working environment and non-compliance with the working standards prescribed by ILO (Indian Labour Organisation) are associated with morbidities among the workers. Environmental modification, use of protective devices, availability of basic minimum facilities for working and continuous monitoring of the workplaces by competent authority would help in decreasing the prevalence of morbidities among woodworkers.

scholarly journals HUBUNGAN ANTARA PAJANAN KEBISINGAN DENGAN GANGGUAN NON- AUDIOTORY PADA PETUGAS KEAMANAN DALAM (PKD) PT KERETA API INDONESIA (KAI) DI STASIUN BOGOR TAHUN 2020

PROMOTOR ◽  
2021 ◽  
Vol 4 (2) ◽  
pp. 114
Author(s):  
Firdha Wahyuni Ardianty ◽  
Anissatul Fathimah ◽  
Andi Asnifatima
Keyword(s):  
Occupational Safety ◽  
Communication Disorders ◽  
Sound Level ◽  
Occupational Safety And Health ◽  
P Value ◽  
Health Administration ◽  
Chi Square ◽  
Safety And Health ◽  
Chi Square Test ◽  
Level Meter

<div class="WordSection1"><p>Amerika Serikat, berdasarkan <em>National Institute for Deafness and Communication Disorders </em>(NICDC) dan <em>National Occupational Safety and Health Administration </em>(OSHA) pada  tahun 2008 mengatakan bahwa lebih dari 30-40 juta masyarakat Amerika Serikat terpajam bunyi bising yang menyebabkan gangguan <em>non audiotory</em>. Selain itu menurut <em>National Institute For Occupational Safety And Health </em>(NIOSH) diketahui bahwa 22 juta pekerja memiliki potensi mengalami gangguan <em>non audiotory </em>setiap tahunnya. Di berbagai industri di Indonesia, angka kebisingan ini berkisar antara 30-50%. Sehingga gangguan <em>non audiotory </em>menjadi permasalahan yang patut diperhatikan bagi perindustrian di Indonesia. Pada tahun 2007, sekitar 23.000 orang kasus dilaporkan sebagai gangguan <em>non audiotory </em>akibat mesin-mesin yang menghasilkan intensitas kebisingan di ats NAB (Muslim, 2015). Kebisingan di tempat kerja dapat menimbulkan dampak negatif bagi kesehatan yaitu  gangguan <em>audiotory </em>dan gangguan <em>non audiotory</em>. Penelitian ini bertujuan untuk mengetahui hubungan antara pajanan kebisingan dengan gangguan <em>non audiotory </em>pada petugas keamanan dalam (PKD) pada PT Kereta Api Indonesia (KAI) di stasiun bogor. Variabel yang digunakan dalam penelitian ini yaitu variabel independen meliputi pajanan kebisingan, umur pekerja, masa kerja, pendidikan, lama pajanan/jam kerja dan alat pelindung telinga sedangkan variabel dependennya yaitu gangguan <em>non audiotory</em>. Penelitian ini menggunakan metode kuantitatif deskriptif. Teknik pengambilan sampel menggunakan <em>Non-probability Sampling </em>dengan jumlah sampel penelitian sebesar 75 responden. Pengambilan data kebisingan dengan menggunakan alat <em>sound level meter</em>, menyebarkan kuesioner serta wawancara mendalam mengenai alat pelindung telinga. Analisis data penelitian menggunakan aplikasi statistic dengan menggunakan uji <em>chi-square</em>. Berdasarkan hasil penelitian ini, kebisingan pada petugas keamanan dalam stasiun bogor di empat titik pengukuran nilai minimum sebesar 84,5 dBA dan nilai maksimum sebesar 92,5 dBA dan hasil penelitian ini menunjukkan bahwa 50 pekerja (66,7%) tidak mengalami gangguan <em>non audiotory </em>dan 25 pekerja (33,3%) mengalami gangguan <em>non audiotory</em>. Hasil uji statistic <em>Chi-Square Test </em>diperoleh dari enam variabel yang diteliti diketahui bahwa semua variabel tidak bermakna dengan nilai  pajanan  kebisingan (<em>p-value</em>=0,111), umur (<em>p-value</em>=0,683), masa kerja (<em>p-value</em>=0,173) yang memiliki nilai (<em>p-value</em>&gt;0,05) artinya dari variabel tersebut tidak ada hubungan yang bermakna dengan gangguan <em>non audiotory </em>pada petugas keamanan dalam pada PT Kereta Api Indonesia di stasiun bogor. Kesimpulan dari penelitian ini adalah tidak ada hubungan yang bermakna antara pajanan kebisingan, umur dan masa kerja dengan gangguan <em>non audiotory </em>pada petugas keamanan dalam pada PT Kereta Api Indonesia di stasiun bogor. Saran bagi PT KAI yaitu melakukan pergantian petugas setiap 4 jam sekali dari tempat kerja yang bising ke tempat yang tidak terpapar bising sedangkan saran bagi  pekerja memanfaatkan waktu sebaik mungkin untuk mencari tempat yang tidak bising pada saat istirahat, agar tubuh menjadi lebih rileks sehingga dapat menurunkan risiko terjadinya gangguan <em>non audiotory</em>.</p></div>

scholarly journals Causes, Impact of Noises with Remedies in Rathinamangalam, Tamilnadu, India

2019 ◽  
Vol 8 (4S2) ◽  
pp. 123-126
Keyword(s):  
Heavy Traffic ◽  
Noise Pollution ◽  
Mining Area ◽  
Sound Level ◽  
Pollution Level ◽  
Different Seasons ◽  
Central Pollution Control Board ◽  
One Year ◽  
Level Meter ◽  
The Impact

The noise pollution is one of the slow killer and The pollution level increasing day by day mostly in Industrial areas, heavy traffic, markets, theatre, and etc., mainly in metropolitan cities and municipalities in the developing countries. In this research study the noise pollution analysis in quarry mining area was carried out in Rathinamangalam, Tamilnadu, India. Further, the causes of Noise Impact was also studied and analyzed. Mainly the health effects were studied. The measurement of sound was made by Sound level meter for period of one year the impact of pollution was also observed on the biotic components. The noise pollution in the very close vicinity of quarry site was higher than the prescribed guidelines especially in the sensitive and residential zone areas. The noise pollution sampling was carried at different seasons, timings and the results are tabulated and compared With Central Pollution Control Board (CPCB) guidelines. Suitable remedial Measures also suggested for controlling the same.

scholarly journals Hubungan Shift Kerja dan Kebisingan dengan Stres Kerja Pada Karyawan Bagian Produksi Gilingan PT. Riau Crumb Rubber Factory Pekanbaru

2014 ◽  
Vol 1 (2) ◽  
pp. 88
Author(s):  
Riri Juliyati ◽  
Zulfan Saam ◽  
Nopriadi Nopriadi
Keyword(s):  
Work Stress ◽  
Night Shift ◽  
Total Sample ◽  
Crumb Rubber ◽  
Sound Level ◽  
P Value ◽  
Chi Square ◽  
Cross Sectional ◽  
Chi Square Test ◽  
Level Meter

This research aims to analyze the correlation between shift work and noise withwork stress of the workers in milling production division of PT . Riau Crumb Rubber Factory.This research is an observational analytic with cross sectional approach. The population ofthis study consists of 125 workers in milling production. With purposive sampling techniqueand using predetermined criteria obtained a total sample of 60 people. The data werecollected using work stress scale and the measurement noise by using a sound level meter andanalyzed with bivariate using the chi square test. The results showed that there was asignificant correlation between work shifts with work stress with p value (0.000) < α ( 0.05 ).Employees who work on the night shift tend to have a high work stress when compared withemployees working on the morning shift and afternoon . There is a significant correlationbetween the level of noise with work stress with p value (0.000) < α ( 0.05 ). The higher thenoise level the higher work stress.

scholarly journals ANALISIS PAPARAN KEBISINGAN TERHADAP STRESS KERJA PADA TENAGA KERJA PENGOLAHAN KELAPA SAWIT PTPN VIII PKS 2 CIKASUNGKA KABUPATEN BOGOR

PROMOTOR ◽  
2021 ◽  
Vol 4 (4) ◽  
pp. 329
Author(s):  
Jundan Sibti Umar ◽  
Rubi Ginanjar ◽  
Rahma Listyandini
Keyword(s):  
Sound Level ◽  
P Value ◽  
Sound Level Meter ◽  
Chi Square ◽  
Cross Sectional ◽  
Chi Square Test ◽  
Level Meter

<div class="WordSection1"><p>Perkembangan teknologi pada indutri dapat mengakibatkan risiko kesehatan pada pekerja. Kebisingan yang dihasilkan dari mesin dapat menimbulkan dampak negatif bagi kesehatan <em>auditori </em>maupun <em>non-auditori </em>bagi tenaga kerja. Salah satu gangguan <em>non-auditori </em>dari paparan kebisingan yang dapat mengganggu kinerja tenaga kerja adalah stres kerja. Penelitian ini bertujuan untuk mengetahui hubungan paparan kebisingan terhadap stress kerja pada tenaga kerja pengolahaan kelapa sawit PTPN VIII PKS 2 Cikasungka Kabupaten Bogor Tahun 2020. Penelitian ini menggunakan metode analitik observasional dengan desain penelitian <em>cross sectional. </em>Jumlah populasi sebanyak 42 pekerja bagian pengolahan dengan jumlah sampel seluruh populasi. Teknik pengambilan sampling menggunakan <em>nonprobability sampling </em>dengan mengambil sampling jenuh. Pengambilan data kebisingan dilakukan dengan pengukuran langsung menggunakan alat <em>sound level meter </em>dan kuesioner. Analisis data penelitian menggunakan aplikasi statistic dengan menggunakan uji <em>chi-square. </em>Hasil penelitian didapat, intensitas kebisingan di PTPN VIII PKS 2 Cikasungka di enam stasiun berkisar antara 84,6-97,5 dBA dan stress kerja menunjukan bahwa 31 tenaga kerja (73,8%) mengalami stress ringan dan 11 tenaga kerja (26,2%) mengalami stress berat. Hasil uji statistic <em>Chi-Square Test </em>menyatakan bahwa tidak ada hubungan antara kebisingan dengan stress kerja dengan nilai <em>p-value </em>adalah 1,000 (p&gt;0,05) dan ada hubungan antara beban kerja dengan stress kerja dengan <em>p- value </em>adalah 0,043 (p&lt;0,05) Kesimpulan dari penelitian ini adalah kebisingan di PTPN VIII PKS 2 Cikasungka melebihi nilai ambang batas 85 dBA dengan tidak ada hubungan yang bermakna antara kebisingan dengan stress kerja dan ada hubungan beban kerja dengan stress kerja pada tenaga kerja pengolahan kelapa sawit PTPN VIII PKS 2 Cikasungka Kabupaten Bogor Tahun 2020. Tingkat kebisingan yang tinggi dapat berpotensi menimbulkan stress kerja. Untuk itu disarankan untuk melakukan pengendalian kebisingan dengan cara mengecek, dan memberi pelumas pada mesin dan menyediakan alat pelindung telinga untuk tenaga kerja agar mengurangi tingkat kebisingan yang tinggi.</p></div>

scholarly journals The impact of COVID-19 related national lockdown on ophthalmic emergency in Italy: A multicenter study

2021 ◽  
pp. 112067212110280
Author(s):  
Maria L Salvetat ◽  
Carlo Salati ◽  
Patrizia Busatto ◽  
Marco Zeppieri
Keyword(s):  
Gender Bias ◽  
Tertiary Care ◽  
Lower Number ◽  
Electronic Records ◽  
Chi Square ◽  
Efficient Access ◽  
Chi Square Test ◽  
Unpaired Student ◽  
The Impact ◽  
Wet Amd

Purpose: To assess ocular pathologies admitted to Italian Emergency Eye Departments (EEDs) during the COVID-19 pandemic national lockdown in 2020 in comparison with the same period in 2019. Methods: Electronic records of all patients presenting at EEDs of two tertiary-care Eye Centers during the COVID-19 national lockdown in Italy (March 10–May 3, 2020) were compared with the equivalent period in 2019. Main outcomes were patient age, gender, and diagnoses. Statistical analysis included unpaired Student t-tests, Poisson regression, and chi-square test. Results: Overall EED visits significantly decreased by 54.1% during the 2020 lockdown compared to 2019 (851 vs 1854, p < 0.001). During lockdown, patients showed comparable mean age (52.8 years in 2020 vs 53.3 years in 2019, p = 0.52) and significant male gender bias (61.1% in 2020 vs 55.8% in 2019, p < 0.0001). The most frequent pathologies were eye inflammations, trauma-related incidents, and spontaneous acute vitreous detachment. Patients with inflammation, headache/hemicrania, and spontaneous subconjunctival hemorrhages were significantly less, whereas those with trauma-related diagnoses were significantly higher during the lockdown as compared with 2019 ( p < 0.05). The proportion of non-urgent visits decreased from 17% in 2019 to 8% in 2020 ( p < 0.001). Conclusions: During the 2020 lockdown, there was a significant reduction of accesses to EED, especially for non-urgent pathologies. Potentially visual function threatening conditions, such as trauma-related pathologies, retinal detachment or ruptures, and wet AMD, showed lower number of cases but higher or stable proportion relative to the total caseload, suggesting a correct and efficient access to ophthalmic health care during the pandemic period.

Testing of Sonic-Absorbent Panels’ Behavior in Open-Air Environment

2012 ◽  
Author(s):  
Petru A. Pop ◽  
Patricia A. Ungur ◽  
Liviu Lazar ◽  
Mircea Gordan ◽  
Florin M. Marcu
Keyword(s):  
High Frequency ◽  
Noise Pollution ◽  
Sound Level ◽  
Sound Level Meter ◽  
Data Logger ◽  
Public Buildings ◽  
Gypsum Plaster ◽  
Level Meter ◽  
And Control

One wildly used method to reduce and control the noise pollution in green city’s buildings is using sonic-absorbent panels. Their applications can be multiple, such as the insulation of buildings, acoustic barriers and fences along the highway or in front of supermarkets, hospitals and other public buildings. This paper presents a method for testing the behavior of sonic-absorbent panels in open-air environment. The work represents a carrying on of previous research about absorbent materials from gypsum family, tested in lab conditions. The experiment setup used a dynamic installation and as a sample a stand formed by six sonic-absorbent panels from special modeling alpha-gypsum plaster. This installation has been composed of two loudspeakers for emitting the sound at a well-defined frequency by the first laptop, the microphone for detecting and transmitting the signal to the second laptop for analyzing and processing the data. All operations were performed using MATLAB Programs, while a Data Logger Sound Level Meter type CENTER 332 was put on near the microphone to compare both results. The first experiment of acoustic stand has been realized by setting up the installation at a frequency from 50 Hz to 1250 Hz and altering the distance between loudspeakers and stand at 0.5m to 1m and 1.5m, respectively. The second experiment kept the same test’s conditions, while two and three layers of sonic-absorbent panels formed the stand, respectively, but at same distance from source of 0.5 m. In both tests, the results underlined the good sonic-absorbent properties of these panels, especially at medium and high frequency, which can recommend using the panels for multiple outside applications.

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