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All Journal JURNAL KESEHATAN LINGKUNGAN (Journal of Environmental Health) National Journal of Occupational Health and Safety
Dyah Prasetyawati, Naris
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Public Health

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Distribution of Motor Vehicle Volumes and Ambient Air Dust Levels in Hot Points of Yogyakarta City, Indonesia Ardianto, Heru; Dyah Prasetyawati, Naris; Sudaryanto, Sigid
JURNAL KESEHATAN LINGKUNGAN Vol. 16 No. 1 (2024): JURNAL KESEHATAN LINGKUNGAN
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jkl.v16i1.2024.76-88

Abstract

Introduction: Yogyakarta City, Indonesia is a center for tourism, government, education, and the economy. In line with increasing mobility and transportation, this situation has a positive impact economically, but a negative impact in terms of air pollution due to vehicle emissions. Motorized vehicles contribute to air pollution reaching 66.34% of total pollution. PM2.5 is a critical parameter in the city of Yogyakarta. Methods: This research aims to determine the volume of motorized vehicle traffic and the distribution of dust levels in the ambient air of Yogyakarta City. Data collection used non-probability purposive sampling with the roadside method. Vehicle volume is mapped using hotspots and dust levels using interpolation. Results and Discussion: The average vehicle volume in the morning was 2,293.147 pcu/hour and in the afternoon it was 2,301.173 pcu/hour. The hotspot results showed that the volume of motorized vehicles in the morning category was very high at 2,921.600-5,655 pcu/hour and in the afternoon it was 3,678.800-4,558 pcu/hour. The average dust content in the morning is 0.10667 grams/m3 and in the afternoon it is 0.10240 grams/m3. The interpolation results showed that the distribution of dust levels in the very high category in the morning was 0.17000-0.20000 grams/m3 and in the afternoon it was 0.21000-0.26000 grams/m3. Conclusion: The highest average volume of vehicles occurs in the afternoon while the highest total dust content occurs in the morning.
Efektivitas dan Keberterimaan Madcom Noise Protection sebagai Alat Pelindung Pendengaran Berbasis Perlindungan Ganda Ramadhan, Ahmad Athif Wahyu; Yamtana, Yamtana; Dyah Prasetyawati, Naris; Sudaryanto, Sigid
National Journal of Occupational Health and Safety Vol. 6, No. 2
Publisher : UI Scholars Hub

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Abstract

Industrial environments often generate high noise levels due to the continuous operation of machinery and production equipment. Persistent exposure to workplace noise exceeding the Threshold Limit Value (TLV) can lead to noise-induced hearing loss. According to the World Health Organization, an estimated 430 million people worldwide require rehabilitation for hearing impairment, with 109.4 million of these cases occurring in Southeast and Central Asia. As a critical component of Occupational Health and Safety (OHS) management, noise control is often implemented using Hearing Protection Devices (HPDs). This study aims to evaluate the effectiveness of an earplug-earmuff combination, developed as Madcom Noise Protection, in enhancing noise attenuation and assessing its acceptability among users. Utilizing a quasi-experimental design, the study involved 30 students from Poltekkes Kemenkes Yogyakarta. The results demonstrate that Madcom Noise Protection significantly improved hearing threshold levels by an average of 8.50 dB compared to using an earmuff alone ($p < 0.001$). Furthermore, user acceptability was remarkably high, reaching an average score of 97.33%. In conclusion, the developed earplug-earmuff combination is highly effective in strengthening hearing protection and is well-received as an innovative HPD modification. Keywords: Noise, Hearing Protection Devices (HPDs), Earplug-Earmuff, Madcom Noise Protection
Co-Authors Ardianto, Heru Ramadhan, Ahmad Athif Wahyu sigid sudaryanto, sigid Yamtana Yamtana, Yamtana