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This study aims to analyze and compare the cabin noise levels of the Mitsubishi Destinator Ultimate variant (sunroof) and Exceed variant (non-sunroof) under various driving speed conditions. Measurements were conducted using a Sound Level Meter inside the cabin at idle, 10, 30, 50, 70, 90, and 100 km/h. Results indicate that the Ultimate (sunroof) variant consistently produces higher noise levels than the Exceed (non-sunroof) variant across all speed variations. The largest noise difference was recorded at 100 km/h at 6.50 dB, while the smallest occurred at idle at 0.05 dB. Noise levels in both variants increased significantly with increasing speed, with the sunroof variant reaching 70.00 dB and the non-sunroof variant reaching 63.50 dB at 100 km/h. This difference is attributed to gaps and seals in the sunroof panel, which allow greater noise penetration from the external environment.

Benign Paroxysmal Positional Vertigo (BPPV) is the most common cause of peripheral vertigo, characterized by brief episodes of vertigo due to otoconia displacement. Although most previous studies have focused on intrinsic factors such as age, gender, osteoporosis, and metabolic disorders, evidence regarding the role of environmental factors, particularly occupational noise exposure, is limited. Chronic noise has the potential to affect vestibular function through both sensory and vascular mechanisms. This study aims to narratively review the effect of occupational noise exposure on the risk of BPPV by integrating clinical, epidemiological, and experimental findings. The method used is a literature-based narrative review of the PubMed, Scopus, Web of Science, and Google Scholar databases without year restrictions, using the keywords "BPPV", "occupational noise exposure", "vestibular dysfunction", "VEMP", and "otoconia displacement". The search results obtained 25 relevant articles linking BPPV to otolith, hormonal, vascular, lifestyle factors, and occupational noise exposure. The results indicate that chronic noise can cause sensory damage (otoconia and vestibular hair cells), vascular disorders (hypertension, cardiovascular disorders, and inner ear microvascular circulation disorders), and exacerbate lifestyle comorbidities (sedentary lifestyle, osteoporosis, hypertension, diabetes). The discussion confirms that these multifactorial mechanisms explain the susceptibility of industrial workers to BPPV despite normal hearing function. The conclusion of this study is that workplace noise exposure has been shown to play a significant role as a risk factor for BPPV, therefore, prevention strategies, vestibular health monitoring, and healthy lifestyle interventions need to be optimized in occupational health programs.

Penelitian ini bertujuan untuk mengkaji dampak penutupan perlintasan kereta api Alastuo terhadap peningkatan volume kendaraan dan intensitas kebisingan di kawasan Fly Over Bangetayu, Kota Semarang. Fenomena ini mencerminkan tantangan tata kelola lalu lintas urban akibat perubahan infrastruktur transportasi. Dengan menggunakan pendekatan kualitatif deskriptif, studi ini dilakukan melalui metode studi kasus di lokasi terdampak. Data dikumpulkan melalui wawancara semi-terstruktur, observasi partisipatif, dokumentasi visual, serta pengukuran intensitas kebisingan menggunakan sound level meter pada sembilan titik waktu berbeda selama tiga hari pengamatan. Partisipan meliputi warga sekitar, pengguna jalan, dan petugas lalu lintas. Hasil analisis tematik menunjukkan adanya korelasi positif antara peningkatan volume kendaraan dan intensitas kebisingan, dengan nilai puncak kebisingan mencapai 93,6 dB pada sore hari. Temuan ini menegaskan bahwa perubahan rute akibat intervensi kebijakan infrastruktur dapat menyebabkan beban akustik yang signifikan di jalur alternatif. Penelitian ini memberikan kontribusi pada pemahaman tentang relasi spasial antara kebijakan lalu lintas dan degradasi lingkungan akustik. Implikasi teoretis mengarah pada integrasi studi kebisingan dalam perencanaan transportasi berkelanjutan, sementara implikasi praktis mencakup kebutuhan akan pengaturan lalu lintas yang adaptif serta mitigasi kebisingan melalui vegetasi, jalur alternatif, dan edukasi berkendara. Penelitian lanjutan disarankan melibatkan pendekatan interdisipliner untuk mengevaluasi dampak kebisingan terhadap kesehatan masyarakat secara langsung.

An exhaust pipe is a tubular device used to channel combustion gases from a vehicle’s engine into the environment. In addition to this primary function, the exhaust also serves to reduce the noise level produced by engine combustion. The component of the exhaust system that significantly affects torque, brake mean effective pressure (BMEP), and noise level is the silencer. This study aims to compare the torque, BMEP, and noise levels produced by variations in the length and construction dimensions of elliptical filter designs in the silencer. The silencers used in this research have lengths of 280 mm, 300 mm, and 260 mm, with short ellipse filter diameters of 25 mm and long ellipse filter diameters of 30 mm, 40 mm, and 50 mm. The research employs an experimental quantitative method, and the data were analyzed using one-way Analysis of Variance (ANOVA). The experiment was conducted in a Mechanical Engineering workshop using a Yamaha R15 V3 155cc injection motorcycle (2021), a Super Dyno 50L dyno test, and a sound level meter, from February to April 2024. The engine speeds tested were 1500, 2500, 3500, 4500, 5500, and 6500 rpm. The results show that the variation of ellipse dimensions 25 mm × 50 mm × 260 mm produced a maximum torque of 12.77 N·m at 4500 rpm, a maximum BMEP of 1021 kPa at 4500 rpm, and a noise level of 80.3 dB. The variation 25 mm × 40 mm × 300 mm produced a maximum torque of 12.88 N·m, a BMEP of 1042 kPa, and a noise level of 75.60 dB, while the variation 25 mm × 30 mm × 280 mm produced a maximum torque of 12.67 N·m, a BMEP of 1013 kPa, and a noise level of 75.63 dB.

Noise is a physical hazard in the work environment that caan reduce hearing loss, especially in the rubber processing industry. The research aims to describe the noise level and control efforts in the production area of PT. Karet XYZ Palembang City in 2025. This study uses a descriptive design with a cross-sectional approach.  Data were collected through direct noise level measurements using sound level meters at wet and dry production areas by taking 8 measurements and questionnaires on 75 selected purposive sampling workers.  Data analysis was carried out univariately. It shows that most of the measurement points have a noise level above the threshold value of 85 dBA in accordance with the Regulation of the Minister of Health of the Republic of Indonesia Number 70 of 2016. The highest values were recorded in the Hummer Mill engine (89,76 dBA) and the Cooling Tunnel (89,70 dBA). All respondents were exposed to noise for ≥8 hours/day. Noise control has been carried out with administrative techniques and the use of personal protective equipment (PPE) but has not been fully effective from the complaints of 7 workers regarding suboptimal protection. The noise level at PT. Karet XYZ and duration of exposure exceeding threshold values that increase the risk to workers health. It is necessary to increase the effectiveness of noise control with a technical, administrative approach and monitoring the optimal use of personal protective equipment (PPE).

The purpose of this study was to analyze the relationship between noise levels and work stress among employees at Karunia Kasih Hospital. This study used a cross-sectional design with a population consisting of all employees in the Front Office, Polyclinic Nurses, and Specialist Doctors. The study sample consisted of 80 respondents selected using total sampling technique. Noise levels were measured using a Sound Level Meter, while work-related stress was assessed using a questionnaire. Data analysis was conducted using the chi-square test with a significance level of α = 0.05. The measurement results indicated that 80% of the work areas had noise levels exceeding the NAB 65 dBA threshold. The Outpatient Corridor area had the highest noise level (83 dBA). A total of 65% of workers experienced moderate to severe work-related stress. There was a significant relationship between noise levels and work-related stress (p-value = 0.001). Age (p-value = 0.024) and length of service (p-value = 0.037) also showed a significant relationship with work-related stress. There is a significant relationship between noise levels and work-related stress among workers at Karunia Kasih Hospital. Efforts to control noise levels and comprehensive stress management programs are needed to protect worker health.

Automatic transmission motorcycles, especially those with 110cc engines, are increasingly in demand by the public because of their practicality. The performance of this motorcycle is greatly influenced by the transmission system, especially the Drive pulley and Roller components. The correct setting of the Drive pulley angle and Roller mass can improve engine performance and reduce noise, thus supporting driving comfort. This study aims to analyze the effect of variations in the Drive pulley angle and Roller mass on engine performance, in terms of power (HP), torque (Nm), and noise level (dB) at several engine speeds. The variations tested include the Drive pulley angle of 13.5°–14° and the Roller mass of 13–15 grams, with testing at 5000, 6000, 7000, and 8000 RPM. The test results show that the combination of the angle and Roller mass affects engine performance. At 5000 RPM, the combination of the 14° angle and 15 gram Roller produces the highest power, torque, and noise. At 6000 RPM, the combination of 13.8° and 13 grams produces a maximum power of 6.86 HP and 8.15 Nm of torque, with a noise of 97.40 dB. While at 7000–8000 RPM, the combination of 13.5° and 15 grams provides the best performance with 7.10 HP and 6.30 Nm of torque, accompanied by a noise of 104.17 dB. In general, increasing the angle and mass of the Roller increases performance, but is followed by an increase in noise.

Noise generated by Diesel Power Plants (PLTD) is a significant environmental problem, especially in urban areas and settlements adjacent to power plant facilities. This study analyzes the noise level around the Fakfak Cotton Plant and its impact on the local community. This study uses a combination of methods, including noise level measurements using a Sound Level Meter (SLM), field observations, interviews with the community, and a SWOT analysis to evaluate the strengths, weaknesses, opportunities, and threats in noise mitigation. The measurement results show that the noise level generated exceeds the threshold of 55 dBA set by the Decree of the Minister of Environment Number 48 of 1996 for residential areas. This condition has a negative impact on the comfort, health, and social interaction of the community around the PLTD location, causing sleep disturbances, stress, and decreased quality of life. The SWOT analysis shows that although the PLTD has advantages in terms of sustainable operations and professional workers, the main weaknesses lie in the lack of soundproofing and the absence of regular noise evaluations. However, there is a great opportunity in the application of noise mitigation technologies, such as the installation of soundproofing, the use of acoustic walls, and planting vegetation as a sound barrier. In addition, collaboration with local governments and increasing environmental awareness can help manage noise impacts more effectively. The main threats identified include potential social conflicts with surrounding communities, negative health impacts, and changes in environmental policies that can affect PLTD operations. With the right mitigation strategies, such as the application of soundproofing technologies, improved communication with the community, and better integration of environmental policies, the environment around PLTDs can become more comfortable and conducive for the community. This study emphasizes the importance of regulatory and technology-based approaches in managing noise in urban environments, as well as the need for sustainable mitigation measures to maintain the well-being of communities around PLTDs..

Currently, the need for office buildings in the city of Surabaya is increasing along with the development of the economy in the city of Surabaya. PT X plans to contribute to meeting these needs, namely by building an office building in the city of Surabaya. This research was designed to calculate and determine the estimated magnitude of the impact of noise levels resulting from PT X's operational activities. Based on the calculation of the estimated magnitude of the impact, it is known that the noise level at the activity location without any activity is 52.4 dB(A) with a medium environmental quality value category (scale 3) and with operational activities producing a noise level of 67.64 dB(A). with the environmental quality value category being very bad (scale 1), so that the difference in environmental quality value between the noise level with activities and the noise level without activities is 2 (Medium Negative). Meanwhile, the noise level in settlements around the activity location without any activity is 47.8 dB(A) with a medium environmental quality value category (scale 4) and with operational activities producing a noise level of 54.66 dB(A) with the category The environmental quality value is medium (scale 3), so the difference in environmental quality value between the noise level with activities and the noise level without activities is 1 (Small Negative).

This study analyzes noise levels caused by traffic activities and generator sets (genset) in the Semarang University environment. Measurements were conducted using descriptive analytical methods by comparing measurement results against noise quality standards according to KepmenLH No.48 of 1996. Data collection was carried out in November 2023 at three location points (in front of Building V, Sports Center, and USM gate) during morning (08.00-08.30), afternoon (12.30-13.00), and evening (17.30-18.00) on weekdays and weekends. Measurement results showed traffic noise levels on weekdays reached 88.3 dB in front of the Sports Center, 85.3 dB at Building V, and 82.1 dB at the USM gate. On weekends, the highest noise level reached 82 dB. Generator noise measurements in stationary conditions reached 108.4 dB and increased to 112.4 dB during loading. The highest vehicle volume occurred during weekday evenings, reaching 3,176 vehicles/hour. Research results indicate that noise levels in the campus environment are above the permitted threshold of 55 dB for educational areas. The study recommends the construction of noise barriers and evaluation of generator placement to reduce noise impact on campus activities.

Noise in educational environments can affect the effectiveness of teaching and learning processes. This study aims to analyze the impact of traffic noise on teaching and learning activities in Building V of Semarang University, located along the Soekarno-Hatta arterial road. The research method uses a qualitative descriptive approach by measuring noise levels using a Sound Level Meter on six floors of the building. Measurements were taken during active lecture hours with time intervals of 3 x 30 minutes. The results showed that noise levels on floors 1 to 3 were above the educational environment quality standard of 55 dB according to KepMenLH No. 48 of 1996. Meanwhile, on the 6th floor, the noise level averaged around 55 dB. Excessive noise makes it difficult for students to hear lecturers' explanations, reduces their ability to capture information, and decreases learning material retention. To address these issues, sound insulation installation, spatial planning improvements by designing room layouts farther from noise sources, vegetation planting, and lecture rescheduling to avoid peak traffic times are necessary.

Noise in libraries can disrupt the concentration and comfort of visitors who are reading or studying. Therefore, a tool is needed to detect noise and automatically issue warnings to maintain silence in the library environment. This research aims to design and develop a noise detection tool in libraries using Internet of Things (IoT) technology. The device consists of a sound sensor that detects noise levels and sends data to a cloud-based server for analysis. When the noise level exceeds a specified threshold, the tool provides warnings through visual indicators and notifications to the library staff. The prototype was tested in a library environment and was able to detect noise accurately and issue real-time alerts. The results showed that the device effectively reduced noise levels and improved the comfort of library visitors. With the implementation of IoT technology, this system can be accessed and monitored remotely, facilitating library management in maintaining a conducive environment.

The purpose of this service activity is to provide an increased understanding of the concept of noise and carbon emissions of motorized vehicles located on Golf Course Road. Traffic noise and carbon emissions are environmental problems that have an impact on public health. The method used is field observation by measuring the number of vehicles, types of vehicles, noise levels using a decibel meter, and estimating carbon emissions using an estimative approach based on the number of vehicles and the average carbon emissions of each type of vehicle. This service shows the importance of periodic monitoring of noise and air pollution as a basis for urban environmental policy making. This activity went well, so that it was able to provide an increase in the number of vehicles.

Noise can be defined as a sound or noise that can disturb comfort and health and can cause deafness. Noise that occurs continuously with high intensity can unconsciously affect the health of the Crew (ABK) who are on duty on the ship. Health problems can occur because the ABK are required to be in the ship's engine room which can last a very long time according to the route of the ship's voyage. This study aims to determine and analyze the noise in the engine room and accommodation room on the ferry. The data analysis technique used in this study is noise measurement and analysis of measurement data. The results of the study showed that there was 1 room on the MT. Suchaonugnum ship that did not meet the standards of the Indonesian Classification Bureau and MSC.337(91), including the engine control room. The highest noise source produced in the engine room is produced by the auxiliary engine. While in the lounge room, passenger accommodation room and VIP Room the highest sound source is produced by the sound system. The sound system that is always turned on when the ship is operating is one of the sources of noise that makes the noise level in the passenger accommodation room not in accordance with the MSC.337(91) standard because the sound pressure is too high. The noise level in the passenger accommodation space can be overcome by reducing the sound pressure on the sound system.

Construction work is one of the jobs that has various high risks for workers and people who are around it. These risks come from various sources, one of which is noise from various equipment and ongoing activities. One of the jobs that cause high noise in construction work is MEP (Mechanical Electrical Plumbing) work. Based on Permenaker Number 13 Year 2011, the Threshold Value (NAB) for noise that can be accepted by workers is 85 dBA for 8 hours a day. Based on the measurement of the construction of the flats, the MEP work in the form of Beam Separator Elevator Installation, Pipe Fabrication, Electrical Wiring Lighting Installation, as well as Welding and Grinding of Iron Pipe causes noise above the NAB. The highest noise comes from pipe fabrication in the form of iron pipe cutting activities using large grinding tools and bevel machines that produce noise of 107 dBA. From the Daily Noise Dose (DND) calculation, the noise generated from MEP work has a dangerous risk level for workers' hearing. Risk control efforts that can be done are preventive actions based on the K3 hierarchy in the form of administrative controls such as changing working hours or shifts and conducting safety talks before work is carried out. In addition, another preventive measure is the use of PPE such as ear plugs. Based on the calculation of the noise reduction level, the use of ear plugs has not reduced the noise level to reach the NAB, so it is recommended that workers in pipe fabrication work use ear muffs to reduce noise exposure.

This community service activity aims to increase public understanding of how to reduce the impact of noise and carbon emissions from motor vehicles. Noise and carbon emissions from motor vehicles are environmental problems that are increasing along with the growth in the number of vehicles in urban and rural areas. These impacts not only affect air quality, but also the physical and psychological health of the community. This community service activity aims to empower the community in reducing the impact of noise and carbon emissions from motor vehicles through education, training, and concrete actions based on community participation. The implementation methods include socialization of the impacts of noise and emissions, training on environmentally friendly vehicle maintenance, and campaigns promoting the use of alternative modes of transportation such as bicycles, walking, or public transportation. The results of the activity showed an increase in community knowledge and awareness of environmental issues and the formation of self-help groups that play an active role in campaigning for environmentally friendly behavior. With this program, the community is able to contribute to reducing noise and air pollution, while supporting the creation of a healthier and more sustainable environment.

Pelaksanaan proyek konstruksi ini pada Proyek Pembangunan Gedung Resto Cafe 5 Lantai akan membutuhkan pendekatan inovatif untuk menyelesaikan masalah konstruksi yang tidak sesuai. Oleh karena itu, penerapan mode konstruksi dapat membantu menyelesaikan konstruksi. Pondasi merupakan bagian bawah bangunan bangunan yang menahan dengan gaya-gaya beban atas. Pemilihan metode konstruksi pondasi mempunyai pengaruh yang signifikan terhadap keakuratan konstrusksi. Tanah juga memiliki perbedaan kondisi dengan rencana seperti, kelembaban tanah akibat hujan, tiang yang menimbulkan kebisingan, pencemaran udara, dan faktor lainnya. Pondasi harus diperhatikan untuk menjamin kestabilan terhadap gaya luar seperti berat bangunan sendiri, beban isi bangunan, tekanan angina, dan gempa bumi. Pondasi terdiri dua jenis yaitu pondasi dangkal dan pondasi dalam. Dalam proyek ini berdasarkan data yang diperoleh hasil sondir untuk struktur angunan 44 meter. Dan proyek ini menggunakan tiang pancang karena relatif, pengirimian yang signifikan. Dan pada proyek ini menggukan metode konstruksi tiang pancang yaitu metode jack-in-pile yang dapat mengurangi polusi suara lingkungan.

 Background: Fatigue is a process of decreased work performance, work efficiency, and reduced physical strength or endurance to continue activities or work. Data from the International Labor Organization (ILO) in 2012 states that every year 2.3 million people die due to disease or work accidents. In a day there are 847 cases of work accidents, of which around 36% of work accidents that occur are caused by fatigue. Several factors cause fatigue, including environmental factors, namely noise and lighting. The impacts of work fatigue include decreased motivation, and performance, low productivity, work errors, work-related illnesses, and work accidents. Based on initial information from several workers at POM PT. X, it is known that some workers claim to be tired at work. Objective: To determine the relationship between noise intensity and work fatigue in workers at POM PT. X Rokan Hulu 2020.Method: Analytical observational research with a cross-sectional approach, sample of 135 people. The sampling technique was carried out by total sampling which was tested statistically using the chi-square test. Results: There is a relationship between noise intensity and work fatigue (p-value = 0.022).

Provinsi Lampung memiliki sebuah bandara yang bernama Bandar Udara Radin Inten II. Keberhasilan kegiatan ground handling tentu mempunyai peranan penting hal ini lah yang menjadi tugas bagi PT. Gapura Angkasa sebagai salah satu perusahaan jasa ground handling yang melayani kegiatan ramp handling. Banyak risiko yang dihadapi oleh ramp dispatcher saat melaksanakan tugasnya. Tujuan dari penelitian ini untuk mengetahui bagaimana risiko dan faktor penyebab kecelakaan pada kegiatan ramp handling. Penelitian ini menggunakan metode kualitatif deskriptif, pengumpulan data dilakukan dengan observasi partisipatif, wawancara terstruktur dan dokumentasi. Dokumentasi yang digunakan berupa ramp activity checklist yang berlaku. Wawancara terstruktur dilakukan kepada narasumber Kepala Divisi Ramp Handling, petugas engineering, dan petugas divisi operation yang bertugas di Bandar Udara Radin Inten II Lampung. Keabsahan data kualitatif dengan metode triangulasi. Hasil dari penelitian ini terdapat beberapa risiko kecelakaan yang terkait dengan aktivitas ramp handling. Berupa terjepit atau terluka pada saat pemindahan kargo atau penumpang, dan paparan kebisingan yang berkepanjangan. Faktor-faktor yang berpotensi menimbulkan risiko terdapat petugas yang mengabaikan pentingnya alat pelindung diri seperti safety shoes, ear plug, safety cone, dan penggunaan peralatan GSE yang tepat.

Kebisingan adalah suara yang bersumber dari alat-alat produksi dan atau alat-alat kerja yang tidak dikehendaki karena dapat menimbulkan gangguan pendengaran.  Penelitian ini bertujuan untuk mengetahui intensitas kebisingan di SDN 05 Marunda.  Pengukuran intensitas kebisingan dilakukan menggunakan alat ukur Sound Level Meter dengan metoda pengukuran intensitas kebisingan di tempat kerja mengacu pada SNI 7231:2009.  Hasil yang diperoleh akan dibandingkan dengan nilai ambang batas kebisingan pada Peraturan Menteri Ketenagakerjaan Republik Indonesia Nomor 5 tahun 2018 tentang Keselamatan dan Kesehatan kerja Lingkungan Kerja.  Metode Penelitian yang digunakan adalah analisis deskriptif dengan teknik pengumpulan data secara systematic purposive sampling.  Data pengukuran intensitas kebisingan dilakukan selama 8 jam kerja dengan 3 kali waktu pengukuran di setiap titik yaitu pada pagi hari, siang hari dan sore hari.  Adapun titik pengukuran di tempat kerja yang berpotensi terpapar kebisingan dari sumbernya yaitu Koridor Lantai 1, Ruang Kelas Lantai 1, halaman belakang, Ruang Kelas Lantai 3, Koridor Lantai 3 dan Ruang Guru Lantai 3.  Hasil pengukuran dari seluruh titik diperoleh nilai tertinggi didapatkan dari Ruang Kelas Lantai 1 dengan nilai intensitas kebisingan 80,55 dBA, sedangkan nilai terendah diperoleh dari halaman belakang dengan nilai intensitas kebisingan 61,86 dBA.  Secara keseluruhan titik pengukuran tidak didapatkan hasil melebihi dari nilai ambang batas yang diatur pada Peraturan Menteri Ketenagakerjaan Republik Indonesia Nomor 5 tahun 2018 untuk 8 jam kerja.  Hal ini dikarenakan salah satu sumber kebisingan yang selama ini sering dikeluhkan oleh karyawan di SDN 05 Marunda yaitu kegiatan pekerjaan di Kapal seperti revitalisasi kapal beroperasi aktif diluar 8 jam kerja.