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The Comparison of Audio Analysis Using Audio Forensic Technique and Mel Frequency Cepstral Coefficient Method (MFCC) as the Requirement of Digital Evidence Helmy Dzulfikar; Sisdarmanto Adinandra; Erika Ramadhani
JOIN (Jurnal Online Informatika) Vol 6 No 2 (2021)
Publisher : Department of Informatics, UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/join.v6i2.702

Audio forensics is the application of science and scientific methods in handling digital evidence in the form of audio. In this regard, the audio supports the disclosure of various criminal cases and reveals the necessary information needed in the trial process. So far, research related to audio forensics is more on human voices that are recorded directly, either by using a voice recorder or voice recordings on smartphones, which are available on Google Play services or iOS Store. This study compares the analysis of live voices (human voices) with artificial voices on Google Voice and other artificial voices. This study implements the audio forensic analysis, which involves pitch, formant, and spectrogram as the parameters. Besides, it also analyses the data by using feature extraction using the Mel Frequency Cepstral Coefficient (MFCC) method, the Dynamic Time Warping (DTW) method, and applying the K-Nearest Neighbor (KNN) algorithm. The previously made live voice recording and artificial voice are then cut into words. Then, it tests the chunk from the voice recording. The testing of audio forensic techniques with the Praat application obtained similar words between live and artificial voices and provided 40,74% accuracy of information. While the testing by using the MFCC, DTW, KNN methods with the built systems by using Matlab, obtained similar word information between live voice and artificial voice with an accuracy of 33.33%.

IoT Application in a Vision-Based Security System at the At-Taqwa Mosque in Cijulang Nurul Hiron; Rian Nurdiansyah; M.Aris Risnandar; Andri Ulus R; Helmy Dzulfikar; Aldy Putra Aldya
ABDIMAS: Jurnal Pengabdian Masyarakat Vol. 8 No. 1 (2025): ABDIMAS UMTAS: Jurnal Pengabdian Kepada Masyarakat
Publisher : LPPM Universitas Muhammadiyah Tasikmalaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35568/abdimas.v8i1.5564

The use of Internet of Things (IoT) technology has become a trend in various areas of life. In the context of security and monitoring, IoT applications can provide innovative solutions to improve monitoring and protection. This community service program aims to apply the IoT concept in a vision-based security system at the At-Taqwa Cijulang Mosque. Through the integration of sensors and vision devices connected to an IoT network, this program proposes a more effective and efficient solution for monitoring mosque security. Motion and presence sensors will be installed to detect suspicious activity and manage the environment within the mosque. The vision-based security system will use cameras connected to an IoT network to monitor and identify people and activities occurring in the mosque area. In addition, a mobile application will be developed to provide real-time monitoring access to mosque administrators and the local community. The results of the service showed increased security in the environment around the mosque as well as increased awareness of security in the community around the At-Taqwa Cijulang Mosque.

The Comparison of Audio Analysis Using Audio Forensic Technique and Mel Frequency Cepstral Coefficient Method (MFCC) as the Requirement of Digital Evidence Dzulfikar, Helmy; Adinandra, Sisdarmanto; Ramadhani, Erika
JOIN (Jurnal Online Informatika) Vol 6 No 2 (2021)
Publisher : Department of Informatics, UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/join.v6i2.702

Audio forensics is the application of science and scientific methods in handling digital evidence in the form of audio. In this regard, the audio supports the disclosure of various criminal cases and reveals the necessary information needed in the trial process. So far, research related to audio forensics is more on human voices that are recorded directly, either by using a voice recorder or voice recordings on smartphones, which are available on Google Play services or iOS Store. This study compares the analysis of live voices (human voices) with artificial voices on Google Voice and other artificial voices. This study implements the audio forensic analysis, which involves pitch, formant, and spectrogram as the parameters. Besides, it also analyses the data by using feature extraction using the Mel Frequency Cepstral Coefficient (MFCC) method, the Dynamic Time Warping (DTW) method, and applying the K-Nearest Neighbor (KNN) algorithm. The previously made live voice recording and artificial voice are then cut into words. Then, it tests the chunk from the voice recording. The testing of audio forensic techniques with the Praat application obtained similar words between live and artificial voices and provided 40,74% accuracy of information. While the testing by using the MFCC, DTW, KNN methods with the built systems by using Matlab, obtained similar word information between live voice and artificial voice with an accuracy of 33.33%.

EVALUASI MANAJEMEN SIMPUS DAN RMIK ONLINE MENGGUNAKAN FRAMEWORK COBIT 2019 DAN HOT-FIT (STUDI KASUS: PUSKESMAS SANGKALI TASIKMALAYA) Fadillah, Najwa; Fahreza, Aditya Restu; Adriansyah, Muhammad Rehan; Sakhi, Syaefulloh Umar; Dzulfikar, Helmy
Djtechno: Jurnal Teknologi Informasi Vol 6, No 3 (2025): Desember
Publisher : Universitas Dharmawangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46576/djtechno.v6i3.8022

Penelitian ini bertujuan untuk menghasilkan manajemen Sistem Informasi Puskesmas (SIMPUS) dan RMIK Online di Puskesmas Sangkali Tasikmalaya menggunakan kerangka COBIT 2019 dan model HOT-Fit. Metode penelitian yang digunakan adalah deskriptif kualitatif dengan teknik pengumpulan data melalui wawancara, observasi, dan studi dokumentasi. Evaluasi SIMPUS fokus pada domain DSS01- DSS05 COBIT 2019, yang menunjukkan tingkat kematangan tata kelola TI berada pada level 3 (Terkelola dan Terukur). Hasil ini menunjukkan proses operasional telah berjalan stabil dan terkelola, namun belum optimal, terutama pada aspek pencatatan, evaluasi berkala, dan perencanaan kemiskinan layanan. Sementara itu, evaluasi RMIK Online dengan model HOT-Fit menunjukkan tingkat keseimbangan yang tinggi pada aspek manusia, organisasi, teknologi, dan manfaat (net manfaat), meskipun masih diperlukan peningkatan dukungan teknis dan evaluasi rutin. Secara keseluruhan, implementasi sistem informasi telah memberikan dampak positif terhadap efisiensi dan kualitas pelayanan. Penelitian ini Kesimpulannya diperlukan upaya perbaikan berkelanjutan, baik dari sisi teknis maupun manajerial, untuk mencapai tata kelola TI yang lebih matang dan sistem yang terintegrasi penuh.

Evaluasi Kematangan dan Kualitas Layanan SIAKAD Berbasis ITIL V4 di IALM Tazudin, Muhamad Ikhsan; Saomi, Fakhri; Noer, Hyuga Ramadhan; Adawiyah, Siti Fauziah; Dzulfikar, Helmy
Jurnal Ilmiah Sistem Informasi Vol. 5 No. 1 (2026): January: Jurnal Ilmiah Sistem Informasi
Publisher : LPPM Universitas Sains dan Teknologi Komputer

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51903/p1204v49

Institut Agama Islam Latifah Mubarokiyah (IAILM) Pondok Pesantren Suryalaya telah memanfaatkan Sistem Informasi Akademik (SIAKAD) untuk mendukung kegiatan administrasi dan akademik di kampus. Namun, hasil observasi dan wawancara menunjukkan bahwa masih ada berbagai kendala, seperti lambatnya akses sistem pada jam sibuk, kesalahan dalam input data, serta kurangnya tindak lanjut terhadap keluhan pengguna. Penelitian ini bertujuan untuk mengevaluasi tingkat kematangan dan kualitas layanan SIAKAD di IAILM dengan menggunakan kerangka kerja ITIL versi 4, yang berfokus pada dua domain utama, yaitu Manajemen Insiden dan Peningkatan Berkelanjutan. Metode yang digunakan adalah mixed-methods, yang menggabungkan pendekatan kualitatif melalui wawancara dan observasi dengan pendekatan kuantitatif menggunakan kuesioner kepada 35 responden, yang kemudian dianalisis menggunakan SPSS. Hasil penelitian menunjukkan bahwa tingkat kematangan SIAKAD berada pada Level 3 (Defined) dengan nilai rata-rata 2,83, yang berarti proses telah berjalan cukup baik namun belum sepenuhnya terdokumentasi dan distandarisasi. Analisis kesenjangan (gap analysis) menunjukkan selisih 1,17 poin antara kondisi aktual dan ideal, yang mengindikasikan perlunya peningkatan pada aspek dokumentasi, pemantauan, dan konsistensi penerapan layanan. Temuan ini memberikan kontribusi praktis berupa rekomendasi peningkatan sistem serta kontribusi teoritis dalam pengembangan evaluasi layanan teknologi informasi berbasis ITIL di lingkungan pendidikan tinggi. Dengan demikian, hasil penelitian diharapkan dapat menjadi dasar pengembangan tata kelola layanan akademik yang lebih efektif, efisien, dan berkelanjutan.

Analisis dan Evaluasi Infrastruktur Jaringan di SMA Negeri 3 Tasikmalaya Dardha, Muhamad Yusa; Ikhlas, Andri Nur; Dzulfikar, Helmy
Jurnal Teknik Industri Terintegrasi (JUTIN) Vol. 9 No. 2 (2026): April
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jutin.v9i2.57831

This study aims to analyze and evaluate the computer network infrastructure at SMA Negeri 3 Tasikmalaya, which highly depends on an internet connection for school operational activities, such as Dapodik, Computer Based Test (CBT) exams, and e-Raport. Although the school has implemented a dual ISP architecture, allocating the Indibiz line for Administration and a 100 Mbps iForte line for teachers and students, users frequently experience network performance degradation or bottlenecks during peak hours. Furthermore, wireless signal coverage currently reaches only 60%, resulting in the emergence of blank spot areas. Network performance evaluation was conducted using Quality of Service (QoS) parameters based on TIPHON standards. The analysis results indicate that during peak hours, the throughput value falls into the "Poor" category due to the absence of an adaptive bandwidth management system to handle hundreds of users. Issues regarding physical device stacking and security vulnerabilities resulting from a malware attack incident on the virtual server were also discovered. This study recommends implementing bandwidth management using the Per Connection Queue (PCQ) method on Mikrotik, restructuring and adding Access Points, as well as enhancing active network security and monitoring systems.

Evaluasi Kualitas Layanan Jaringan Topologi Daisy Chain Menggunakan NDLC dan TIPHON di SMA Negeri 5 Tasikmalaya Nala, Darrennala Sandeyamugni; Rifka Maulana Yusup, Mochamad; Dzulfikar, Helmy
JEKIN - Jurnal Teknik Informatika Vol. 6 No. 1 (2026)
Publisher : Yayasan Rahmatan Fidunya Wal Akhirah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58794/jekin.v6i1.2122

Infrastruktur jaringan komputer di institusi pendidikan sering menghadapi tantangan stabilitas performa seiring kompleksitas topologi yang digunakan. Penelitian ini bertujuan mengevaluasi kualitas layanan jaringan di laboratorium komputer SMA Negeri 5 Tasikmalaya yang menggunakan penyedia iForte dengan bandwidth 200 Mbps dan topologi daisy chain (estafet) antar switch unmanaged. Metode yang digunakan adalah Network Development Life Cycle (NDLC) yang dibatasi pada tahap analisis dan pemantauan, dengan standar evaluasi Quality of Service (QoS) mengacu pada TIPHON. Pengambilan data dilakukan secara real‑time menggunakan Wireshark untuk analisis paket dan NetSpot untuk pemetaan kekuatan sinyal nirkabel frekuensi 5 GHz. Hasil penelitian menunjukkan bahwa throughput di Lab A (titik awal) mencapai 8,47 Mbps, sedangkan di Lab C (titik ujung) turun menjadi 2,51 Mbps (penurunan ≈70%), yang mengindikasikan bahwa setiap hop tambahan dalam topologi daisy chain menurunkan throughput secara signifikan dan berpotensi mengganggu kegiatan pembelajaran daring seperti ujian online dan konferensi video. Packet loss di Lab C tercatat 2,1% dan delay rata‑rata meningkat dari 10,2 ms (Lab A) menjadi 33–46 ms (Lab C). Kekuatan sinyal di area pojok Lab A turun hingga -72 dBm (kategori kurang optimal). Secara keseluruhan, parameter QoS masih dalam kategori baik hingga sangat baik, namun topologi daisy chain menyebabkan akumulasi latensi dan bufferbloat yang signifikan. Penelitian ini merekomendasikan migrasi ke topologi bintang dan optimalisasi penempatan access point untuk menjamin distribusi performa merata.

PERANCANGAN SISTEM JARINGAN KOMPUTER DENGAN MULTI-ISP MENGGUNAKAN METODE PCC, MANAJEMEN BANDWIDTH, DAN WIRELESS TERPUSAT PADA SMKN 4 KOTA TASIKMALAYA Rohandi, Rifan Fauzi; auliya, selly; Dzulfikar, Helmy
Djtechno: Jurnal Teknologi Informasi Vol 7, No 1 (2026): April
Publisher : Universitas Dharmawangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46576/djtechno.v7i1.8632

This study aims to design a computer network system that improves stability, efficiency, and equal distribution of internet access in SMKN 4 Tasikmalaya, which has a high number of users. The main problems identified include suboptimal utilization of multiple Internet Service Providers (multi-ISP), uneven bandwidth management, and the absence of a centralized wireless system. This research adopts a quantitative approach using the Network Development Life Cycle (NDLC) method, which consists of analysis, design, and simulation stages. The proposed design applies load balancing using the Per Connection Classifier (PCC) method, bandwidth management using Per Connection Queue (PCQ), and centralized wireless control using CAPsMAN. The result of this study is an integrated network system design capable of distributing traffic evenly, improving bandwidth efficiency, and supporting user mobility through a single SSID. This study is expected to provide a solution for improving network service quality in educational environments with high user density.

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