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Studi Korelasi Sinyal Motorik Otot Wajah dan Sinyal Suara Ucap pada Artikulasi Fonem Vokal Faza Lisan; Muhammad Rady; Miranti Indar; Suprijanto
Jurnal Otomasi Kontrol dan Instrumentasi Vol 13 No 2 (2021): Jurnal Otomasi Kontrol dan Instrumentasi
Publisher : Pusat Teknologi Instrumentasi dan Otomasi (PTIO) - Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/joki.2021.13.2.6

Abstract

Perubahan bentuk artikulator memiliki pengaruh pada suara ucap yang dihasilkan, sehingga setiap fonem memiliki karakteristik pola artikulasi yang berbeda. Penelitian ini meninjau hubungan otot artikulator wajah dengan sinyal suara ucap yang dihasilkan pada proses artikulasi fonem vokal. Digunakan 4 elektroda untuk merekam sinyal otot yang diletakkan pada otot depressor anguli oris dan zygomaticus major berdasarkan hasil analisa optical flow citra wajah saat mengucapkan fonem vokal. Dilakukan korelasi silang pada setiap pasang envelope sinyal EMG untuk mengetahui kecenderungan bentuk artikulator pada proses artikulasi. Diperoleh hasil bahwa setiap responden memiliki kecenderungan pola kontraksi pada otot artikulator yang unik, dan terdapat sinkronisasi untuk keempat titik artikulator yang ditandai dengan rendahnya nilai delay hasil korelasi silang untuk keempat pasang elektroda. Selain itu, dilakukan pula analisis total energi kontraksi yang dibutuhkan untuk menggerakkan, menahan serta mengembalikan posisi artikulator pada proses artikulasi. Berdasarkan analisa perbandingan energi, diperoleh hasil bahwa kontribusi otot depressor anguli oris lebih dominan dibandingkan otot zygomaticus major pada proses artikulasi fonem vokal.
Sistem Pemindaian Diameter Dalam Tangki Silinder Tegak Berbasis Ultrasound Ranging sutanto, willi; Suprijanto; Juliastuti, Endang; Prihensa, Herfin Yienda; Gianto
Jurnal Otomasi Kontrol dan Instrumentasi Vol 14 No 2 (2022): Jurnal Otomasi Kontrol dan Instrumentasi
Publisher : Pusat Teknologi Instrumentasi dan Otomasi (PTIO) - Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/joki.2022.14.2.4

Abstract

Upright Cylindrical Fixed Measuring Tank (TUTSIT) is commonly used to store liquids of high economic value. TUTSIT needs to be calibrated periodically. For TUTSIT inner diameter scanning, a prototype ultrasound-based (US) ranging distance scanner has been developed with 3 US transducers with a frequency of 42kHz. For TUTSIT diameter scanning, two US transducers are mounted in a mechanical system that rotates 360o automatically and continuously. To determine the altitude position during scanning, one US transducer is mounted vertically facing vertically down on a tripod supporting the scanner's mechanical system. The scanner system was tested on a 75 kL capacity TUTSIT on course II of the 4 courses in the tank. The scanned data, which came from cloud points from course II, were pre-processed to be cleaned of outliers. The test results show that the system has functioned properly to measure the inner diameter of the tank at a height of 227 cm, 253 cm, and 261 cm. The scanning measurement error at a height of 227 cm and 253 cm is ±0.5% while at a height of 261 cm, the measurement error is about ±2.3%. The flatness of the prototype position greatly affects the accuracy of the diameter measurement, as can be seen from the measurement error at a height of 227 cm and 253 cm which is better than the measurement at a height of 261 cm, which does not pay attention to the flatness of the prototype position.
Co-Authors Endang Juliastuti Faza Lisan Gianto Miranti Indar Muhammad Rady Prihensa, Herfin Yienda Sutanto, Willi