Baskhoro, Olly Bangon (2018) Pengarah Suara Pada Sistem Audio Berdasarkan Beda Phasa. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Pemberian informasi seperti pengumuman, ceramah, dan musik sering dilakukan dalam berbagai acara yang memerlukan ruangan yang luas. Supaya pemberian informasi hanya mencapai target yang dituju dan tidak mengganggu pengunjung lain maka suara harus diarahkan untuk lokasi tertentu. Pada penelitian ini telah dilakukan sebuah perancangan dan realisasi sistem deret speaker dimana intensitas sinyal suara dapat diarahkan dengan sudut kemiringan antara -90o sampai 90o. Untuk menghindari munculnya intensitas suara pada arah yang berlawanan maka jarak antar titik pusat speaker untuk frekuensi 2Khz adalah 8,6 centimeter. Pengarahan suara dilakukan dengan cara memberikan waktu tunda di setiap speaker dengan menggunakan Field Programable Gate Array ALTERA DE-2. Sinyal audio dikonversi dengan menggunakan Analog to Digital Converter 24-bit. Waktu tunda tersebut dihasilkan dengan menggunakan sub program 8-bit D flip-flop dengan clock input sebasar 1 mikro detik. Data pengujian dengan menggunakan osiloskop menunjukkan untuk waktu tunda pada beda phasa 90o sampai 90o memiliki rata-rata kesalahan 3,5%. Data hasil pengujian lobe deret speaker menunjukkan rerata kesalahan pengarahan suara sebesar 19%. Sistem dapat diterapkan pada berbagai acara komersil sehingga meningkatkan efisiensi penggunaan daya dan mengurangi noise lingkungan.
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Information such as announcements,
lectures, and music are often given in various events that require a large room. In order to provide information
to only reach the intended target and does not disturb other visitors, the sound should be directed to a certain area. In this research speaker array system has been designed on which the sound signal slope angle intensity can be directed
in between -90o to 90o. To avoid the emergence of sound
intensity in the opposite direction the distance between two adjacent speakers center point for the frequency of 2Khz is 8.6 cm. Sound directing
is done by giving time delay on each speaker using Field Programable Gate Array ALTERA DE-2. Audio signal is converted by using a 24-bit Analog to Digital Converter. The delay time is generated by using an 8-bit D flip-flop sub-program with input clock of 1 microsecond.
Experiment using oscilloscope shows that time delay has an average error of 3.5% at phase -90o to 90o. The results of
sound lobe test indicate that the average error is 19%
. The system is applicable to a variety of commercial events to increase the power efficiency
and to reduce environmental noise.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Additional Information: | RSE 621.391 6 Bas p-1 3100018074296 |
| Uncontrolled Keywords: | Audio beam steering; Beda phasa; Deret Speaker; Field Programable Gate Array; Audio beam steering; Array Speakers; Field Programable Gate Array , phase diference |
| Subjects: | Q Science > QA Mathematics > QA76 Computer software > QA76.8 Microprocessor T Technology > TA Engineering (General). Civil engineering (General) T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK7871.58 Audio amplifiers--Design and construction. |
| Divisions: | Faculty of Electrical Technology > Electrical Engineering > 20201-(S1) Undergraduate Thesis |
| Depositing User: | Baskhoro Olly Bangon |
| Date Deposited: | 20 Feb 2018 03:26 |
| Last Modified: | 16 Jun 2020 22:47 |
| URI: | http://repository.its.ac.id/id/eprint/49593 |
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