Analisis Pengaruh Cone Displacement terhadap Error Pengukuran dan Simulasi Respon Frekuensi Driver Speaker dan Dodecahedron Speaker

Fajriyah, Latifatul (2023) Analisis Pengaruh Cone Displacement terhadap Error Pengukuran dan Simulasi Respon Frekuensi Driver Speaker dan Dodecahedron Speaker. Other thesis, Institut Teknologi Sepuluh Nopember.

Text 02311940000054-Undergraduate_Thesis.pdf - Accepted Version Restricted to Repository staff only until 1 October 2025. Download (6MB)

Abstract

Speaker merupakan transduser yang menghasilkan bunyi sebagai respon terhadap sinyal input (listrik). Speaker dengan aktuator voice coil memanfaatkan fenomena elektromagnetik untuk menghasilkan bunyi. Gaya bolak-balik yang dihasilkan oleh coil sebagai respon terhadap sinyal listrik menyebabkan cone/membran bergetar. Getaran ini akan menggerakkan udara di sekitar cone dan menimbulkan gelombang bunyi. Getaran pada cone dapat dinyatakan dalam displacement yang merupakan perubahan posisi cone dari kondisi diam. Bunyi yang dihasilkan getaran membran speaker pada audible frequency range disebut respon frekuensi. Karena bunyi speaker berasal dari getaran membran, maka getaran perlu dipertimbangkan dalam perhitungan/simulasi prediksi respon frekuensi speaker. Getaran yang bernilai besar pada frekuensi rendah dapat menjadi penyumbang error simulasi jika tidak diperhitungkan. Speaker sebagai sumber getaran dan kaitannya dengan respon frekuensi kurang mendapat perhatian sehingga penelitian ini menyelidiki pengaruh cone displacement agar dapat mengurangi nilai error antara pengukuran dan simulasi respon frekuensi speaker. Pada penelitian ini dilakukan pengukuran listrik, getaran, dan akustik untuk mengetahui seberapa besar persentase akustik dan getaran pada speaker kemudian dilakukan perhitungan respon frekuensi yang melibatkan getaran. Penelitian ini berhasil memperkecil nilai error. Model perhitungan penelitian ini digunakan untuk mengestimasi respon frekuensi speaker polyhedron untuk memberikan gambaran respon bunyi speaker sebelum perancangan yang sebenarnya.
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Speaker is transducer that produces sound in response to input signal (electricity). Speakers with voice coil actuators utilize electromagnetic phenomena to produce sound. The alternating force generated by coil in response to an electrical signal causes the cone/membrane to vibrate. This vibration will move the air around the cone and cause sound waves. Vibration on the cone can be expressed in terms of displacement (change in cone position from rest). The sound from membrane vibration in audible frequency range is called frequency response. Because speaker sound comes from membrane vibration, it needs to be considered in calculation/simulation of speaker's frequency response prediction. Large value vibrations at low frequencies can contribute error in simulation if not considered. The speaker as a source of vibration and its relation to frequency response has received less attention, so this study investigates effect of cone displacement to reduce error between measurement and simulation of frequency response. In this study, measurements of electricity, vibration, and acoustics were carried out to determine the percentage of speaker acoustics and vibration, then the frequency response involving vibration was calculated. This research succeeded in reducing errors. The calculation model of this study is used to estimate the frequency response of polyhedron speakers to provide an overview of the speaker's acoustic response prior to the actual design.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Cone displacement, polyhedron speaker, respon frekuensi, cone displacement, frequency response, polyhedron speaker
Subjects:	Q Science > QC Physics > QC221 Acoustics. Sound T Technology > TA Engineering (General). Civil engineering (General) > TA355 Vibration.
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Physics Engineering > 30201-(S1) Undergraduate Thesis
Depositing User:	Latifatul Fajriyah
Date Deposited:	08 Aug 2023 04:52
Last Modified:	08 Aug 2023 04:52
URI:	http://repository.its.ac.id/id/eprint/103267

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