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All Journal Science and Physics Education Journal (SPEJ) ORBITA: Jurnal Pendidikan dan Ilmu Fisika SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan Jurnal Dinamika Sosial Budaya Jurnal Pengembangan Rekayasa dan Teknologi Jambura Journal of Electrical and Electronics Engineering Journal of Civil Engineering and Technology Sciences Al-Irsyad Journal of Physics Education Jurnal Pengabdian KOLABORATIF Advance Sustainable Science, Engineering and Technology (ASSET)
Fahrudin Ahmad
Universitas Semarang
Agriculture, Biological Sciences & Forestry Arts Humanities Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Mechanical Engineering Medicine & Pharmacology Nursing Physics Public Health Social Sciences Transportation Other

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Karakterisasi Peluruhan Energi Akustik (Reverberation Time) pada Beton Ringan Berbasis Material Biokomposit Fahrudin Ahmad; Purwanto
Jurnal Pengembangan Rekayasa dan Teknologi Vol. 10 No. 1 (2026): Mei (2026)
Publisher : Universitas Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26623/jprt.v10i1.14206

Abstract

Permasalahan kebisingan di lingkungan perkotaan menuntut pengembangan material konstruksi yang tidak hanya kuat secara struktural tetapi juga memiliki kinerja akustik yang baik. Penelitian ini bertujuan menganalisis karakteristik waktu dengung (reverberation time) pada beton akustik berbasis sabut kelapa dan styrofoam sebagai material ramah lingkungan. Metode yang digunakan adalah eksperimen melalui pengujian langsung pada ruang nyata dengan parameter T20, T30, dan early decay time (EDT) pada rentang frekuensi 100–3150 Hz. Hasil menunjukkan bahwa nilai T20 berkisar antara 1,09–1,87 detik dan T30 antara 1,15–1,82 detik, dengan kecenderungan menurun pada frekuensi tinggi hingga 0,97–1,24 detik. Nilai waktu dengung yang diperoleh berada di bawah 2 detik, menunjukkan kemampuan material dalam menyerap energi bunyi secara efektif. Dengan demikian, beton berbasis sabut kelapa dan styrofoam berpotensi sebagai solusi material akustik berkelanjutan untuk meningkatkan kualitas kenyamanan ruang.
Implementasi Penerangan Jalan Umum Berbasis Solar Cell untuk Peningkatan Keamanan Lingkungan di Widoro I Kelurahan Sembungharjo Genuk Kota Semarang Fahrudin Ahmad; Roni Kartika Pramuyanti; Taufiq Dwi Cahyono
Jurnal Pengabdian KOLABORATIF Vol. 4 No. 1 (2026): January
Publisher : Faculty of Engineering, Universitas Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26623/kolaboratif.v4i1.13255

Abstract

The lack of adequate lighting in Widoro I – Perbalan 3 increases security risks and limits community activities at night. This program provides an independent and sustainable street-lighting solution through the installation of a 1500 W portable solar-powered street lighting (PJU) system. The implementation method integrates the diffusion of appropriate technology, training, and the ABCD approach to ensure technical sustainability and community involvement. The activities include a needs survey, technical planning, installation, socialization, and monitoring. The results indicate an increase in illuminance from 2–3 lux to 25–30 lux, a panel efficiency of 21%, and the availability of backup power for up to three days. The motion sensor system has been proven to improve energy efficiency and expand lighting coverage. Socially, the program increases nighttime activities by 65% and enhances perceptions of environmental safety. This program demonstrates that the application of portable solar-powered street lighting can serve as an effective, efficient, and replicable appropriate-technology model for residential areas with limited access to energy. These findings emphasize the importance of synergy between renewable energy technology and community empowerment to achieve local energy independence.
Pelatihan Instalasi dan Troubleshooting Sistem Audio untuk Pengurus Mushola Aljabbar Desa Tawangrejo Winong Kabupaten Pati Fahrudin Ahmad; Supari; Agus Margiantono; Satria Pinandita
Jurnal Pengabdian KOLABORATIF Vol. 4 No. 1 (2026): January
Publisher : Faculty of Engineering, Universitas Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26623/kolaboratif.v4i1.13262

Abstract

This community service program was conducted to enhance the technical abilities of the management team of Mushola Aljabbar, Tawangrejo, Pati regency, in operating and maintaining the audio system used for religious and social activities. The main problems identified include limited knowledge of audio installation, insufficient understanding of maintenance procedures, and difficulties in handling minor technical issues. The program employed a participatory training method that consisted of theoretical sessions, hands-on installation practice, maintenance activities, and troubleshooting simulations. Participants also took pre-test and post-test evaluations. The results indicate a significant improvement in participants’ competencies, demonstrated by an average score increase of 39.16%. Participants were able to perform basic installation, conduct routine maintenance, and independently solve common technical problems. This program had a positive impact on improving audio quality in the mushola and increasing the management’s self-reliance. Continuous training is recommended to ensure adaptability to technological developments in audio systems.
Pengembangan Kemandirian Pengurus Musholla SMA Negeri 1 Jakenan Pati melalui Pelatihan Instalasi Audio Fahrudin Ahmad; Supari Supari; Agus Margiantono; Satria Pinandita
Jurnal Pengabdian KOLABORATIF Vol. 4 No. 2 (2026): July
Publisher : Faculty of Engineering, Universitas Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26623/kolaboratif.v4i2.13875

Abstract

Sub-optimal management of musholla audio systems is often caused by limited technical competence among administrators and the absence of structured standard operating procedures (SOPs). This Community Service program aimed to enhance the self-reliance of musholla administrators at SMA Negeri 1 Jakenan Pati through practice-based training in audio installation and maintenance. The implementation methods included needs-assessment surveys, technical planning, hands-on training, pre- and post-test evaluations, and the development of SOPs for installation, troubleshooting, and periodic maintenance. A total of 20 participants, consisting of musholla administrators and school technical staff, took part in the program. Evaluation results showed an improvement in scores from a range of 40–70 in the pre-test to 62–95 in the post-test. In addition, the quality of the audio installation improved through cable reorganization, signal level adjustment, and equalizer tuning according to room characteristics. The program also produced practical outputs in the form of training modules and operational SOPs. Overall, the results indicate that practice-based training is effective in enhancing technical competence while simultaneously fostering partner self-reliance in managing musholla audio systems.
Co-Authors Agus MARGIANTONO Aimmatul Husna Bagus Ferdiansah Diah Aryati P.L Erlinasari Ferry Firmawan Khairulzan Yahya Kukuh Wisnuaji Widiatmoko Moch Hikmah Risky Kurniawan Muhammad Rivel Zebertavio Nadirah Darus Purwanti, Hani Purwanto Roni Kartika Pramuyanti Satria Pinandita Sesotyo, Priyo Adi Supari Supari Supari Taufiq Dwi Cahyono Yusuf Nurul Hilal Zaiton Haron