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All Journal Seminar Nasional Aplikasi Teknologi Informasi (SNATI) Jurnal Standardisasi
Achmad Suwandi
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Computer Science & IT Economics, Econometrics & Finance Engineering Industrial & Manufacturing Engineering Social Sciences Other

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The Automation of Sound Absorption Coefficient Measurement Denny Hermawanto; Achmad Suwandi
Seminar Nasional Aplikasi Teknologi Informasi (SNATI) 2006
Publisher : Jurusan Teknik Informatika, Fakultas Teknologi Industri, Universitas Islam Indonesia

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Abstract

By manual method, the sound absorption coefficient measurement should be done by utilizing many type of equipment such as: measuring amplifier, level recorder, band-pass filter, protactor, etc. However it caused inefficient and need longer time in processing measurement data, therefore the automation system of sound absorption coefficient has been realized. An acoustical real time analyzer type B&K 2144 has been used to record the decay of sound pressure level, thus the processing data is driven by computer software program. By using this developed measurement system, the configuration of equipment which is used in measurement system is becoming more simplified, moreover the time process which is required for sound absorption coefficient measurement can be reduced significantly.Keywords: sound absorption coefficient, automation measurement system
ANALISIS KARAKTERISTIK GETARAN PADA KERETA API REL LISTRIK DAN KERETA API REL DIESEL Achmad Suwandi; Daryono Restu Wahono; Denny Hermawanto
JURNAL STANDARDISASI Vol 11, No 2 (2009): Vol. 11(2) 2009
Publisher : Badan Standardisasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31153/js.v11i2.645

Abstract

Vibration monitoring was carried out in two type of trains, namely Railroad Electric Train (KRL) and RailroadDiesel Train (KRD). From measurement results, it was clearly seen that both trains indicate the similar vibrationcharacteristics, where three dominant frequencies, so called: f1, f2 and f3 always appeared in the region offrequency measurement: 1Hz – 80Hz. The maximum vibration level in KRL was found to be 0.17m/s2 at f3(40Hz)in longitudinal direction and 0.164m/s2 at f3(50Hz) in transversal direction. Meanwhile, the maximum vibrationlevel in KRD was found to be 0.37m/s2 at f3(80Hz) in longitudinal direction and 0.354m/s2 at f1(2Hz) in transversaldirection. Based on these results, it is proved that the vibrations in KRD were much higher than the vibrations inKRL. However it is important to be noted, that the vibration levels of both trains were still within allowable limitwhich is recommended by Standard ISO 2631/I (1985).
Co-Authors Daryono Restu Wahono Denny Hermawanto