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All Journal TELKOMNIKA (Telecommunication Computing Electronics and Control)
Achsanul Khabib
State Polytechnic of Malang
Computer Science & IT

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Nonlinearity compensation of low-frequency loudspeaker response using internal model controller Erni Yudaningtyas; Achsanul Khabib; Waru Djuriatno; Dionysius J. D. H. Santjojo; Adharul Muttaqin; Ponco Siwindarto; Zakiyah Amalia
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 17, No 2: April 2019
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v17i2.11761

Abstract

This paper presents the nonlinearity compensation of low-frequency loudspeaker response. The loudspeaker is dedicated to measuring the response of Electret Condenser Microphone which operated in the arterial pulse region. The nonlinearity of loudspeaker has several problems which cause the nonlinearity behaviour consists of the back electromagnetic field, spring, mass of cone and inductance. Nonlinearity compensation is done using the Internal Model Controller with voltage feedback linearization. Several signal tests consist of step, impulse and sine wave signal are examined on different frequencies to validate the effectiveness of the design. The result showed that the Internal Mode Controller can achieve the high-speed response with a small error value.
Low-frequency response test device of electret condenser microphone Erni Yudaningtyas; Achsanul Khabib; Waru Djuriatno; Zakiyah Amalia; Ramadhani Kurniawan Subroto
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 18, No 3: June 2020
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v18i3.14831

Abstract

Arterial pulse measurement using electret condenser microphone requires the standard to validate the value of the measurement. This standard requires the test device to reproducing the mechanical vibration to emulate the arterial pulse vibration. The main objective of this paper is to discuss the test device of electret condenser microphone using class A amplifiers and low-frequency loudspeaker. To validate this pulse measurement, this class a amplifier is examined under an experimental setup. The experiments showed that the device can be used as an alternative solution to generate the mechanical signal source to simulate the human arterial pulse.
Co-Authors Adharul Muttaqin Dionysius J. D. H. Santjojo Erni Yudaningtyas Erni Yudaningtyas Ponco Siwindarto Ramadhani Kurniawan Subroto Waru Djuriatno Waru Djuriatno Zakiyah Amalia