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"The utilization of bricks made of styrofoam is expectedly able to be a soundproof for noise control and as a preventive action to reduce the steadily increasing prevalence of hearing loss. This study aimed to assess the use of sound absorption material in which styrofoam was utilized to reduce the noise exposure. In this study, fine aggregates (sand and styrofoam) were made with a mixture of cement with a composition of 1:4 and 1:6, also the addition of polystyrene waste with a percentage of 0%, 20%, 40%, 60%, and 80%. Determination of acoustical property of the mixture was done by testing the sound absorption coefficient using Four Microphones Impedance Tube (ISO 140-3). The results showed that the highest value of absorption coefficient was at a frequency of 800 Hz with an additional 80% styrofoam for the composition of 1:4 at 0.4100 dB and at a frequency of 800 Hz with an additional 40% styrofoam for the composition of 1:6 at 0.5870 dB."

"Rumah kos mahasiswa yang terletak di kawasan padat penduduk berpotensi terdampak kebisingan lingkungan hingga melampaui standar kebisingan. Hal ini dapat berpengaruh negatif pada kesehatan fisik dan mental mahasiswa di dalam kamar kos. Fasad sebagai lapisan pelindung paling luar pada bangunan perlu ditinjau perannya dalam mengurangi kebisingan. Skripsi ini bertujuan untuk mengetahui gangguan kebisingan lingkungan dan elemen fasad apa yang paling berperan dalam pengendalian kebisingan yang memasuki kamar kos. Kebisingan dapat merambat melalui medium udara lalu mengalami pemantulan, penyerapan, dan penerusan pada saat menyentuh bidang padat seperti fasad rumah kos. Kemampuan fasad dalam mengurangi transmisi kebisingan dapat dipengaruhi oleh elemen fasad seperti jenis material, bukaan, dan bentuk geometri selubung bangunan. Penulisan ini menganalisis elemen fasad rumah kos pada kawasan padat penduduk dan ramai lalu lintas di Jalan Haji Amat Kukusan, Depok sebagai objek studi. Analisis dilakukan berdasarkan pengukuran tingkat kebisingan lingkungan, perhitungan nilai reduksi kebisingan, dan perhitungan persentase elemen fasad rumah kos. Hasil analisis studi kasus menunjukkan bahwa fasad rumah kos terbukti dapat mengurangi kebisingan secara signifikan namun beberapa sampel rumah kos belum dapat mereduksi kebisingan lingkungan hingga mencapai batas standar kebisingan. Elemen yang paling berperan terhadap kemampuan fasad dalam mengurangi kebisingan adalah elemen bukaan.

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Student boarding houses which are located in densely populated areas have the potential to be affected by environmental noise to the point of exceeding noise standards. This can negatively affect the physical and mental health of students in boarding rooms. The facade as the outermost protective layer in a building needs to be reviewed for its role in reducing noise. This thesis aims to find out which environmental noise disturbances and facade elements play the most role in controlling noise that enters the boarding house. Noise can travel through the air medium and then experience reflection, absorption, and transmission when it hits a solid surface, such as the facade of a boarding house. The facade's ability to reduce noise transmission can be affected by facade elements such as the type of material, openings, and the overall geometry of the building. This writing analyzes the elements of the facade of a boarding house in a densely populated and busy traffic area on Jalan Haji Amat Kukusan, Depok as an object of study. The analysis was carried out based on measuring environmental noise levels, calculating noise reduction values, and calculating the percentage of the student boarding houses’ elements. The results of the case study analysis show that the facade of the boarding house is proven to be able to reduce noise significantly, but several boarding house samples have not been able to reduce environmental noise down to the noise standard limit. The elements that play the most role to the facade's ability to reduce noise are the building openings."

"The book provides readers with a snapshot of recent research and industrial trends in field of industrial acoustics and vibration. Each chapter, accepted after a rigorous peer-review process, reports on a selected, original piece of work presented and discussed at the Second International Conference on Acoustics and Vibration (ICAV2018), which was organized by the Tunisian Association of Industrial Acoustics and Vibration (ATAVI) and held March 19-21, in Hammamet, Tunisia. The contributions cover advances in both theory and practice in a variety of subfields, such as: smart materials and structures; fluid-structure interaction; structural acoustics as well as computational vibro-acoustics and numerical methods. Further topics include: engines control, noise identification, robust design, flow-induced vibration and many others. This book provides a valuable resource for both academics and professionals dealing with diverse issues in applied mechanics. By combining advanced theories with industrial issues, it is expected to facilitate communication and collaboration between different groups of researchers and technology users."