PENGEMBANGAN ALAT PERAGA SISTEM AUDIO UNTUK MENINGKATKAN PEMAHAMAN MAHASISWA PENDIDIKAN TEKNIK OTOMOTIF

This research aims to know the feasibility and the effectiveness of media equipment installation of car audio system use of props to students in Mechanical engineering Department of Semarang State University. This research is a type of research R & D. The subject of this study is a student with a total of 60 people divided into 2 classes namely the control class and the experimental class. The object of this research is the medium of audio system installation props. The results of the media test percentage assessment amounted to 88% and the presentation of the material test amounted to 78%, both obtained very decent criteria. The average increase of experimental class learning results was 77.33, while the control class was only 71.47. T test result for post-test value obtained 3.40. The results of the N-gain test calculation obtained an average gain of 0.298 for the control class with a low increase and 0.404 for the experimental class with a moderate increase. The results proved that the installation equipment Media Car audio system is an effective medium to be used as a learning medium.

Perancangan Sistem Audio Mobil Berbasiskan Sistem Pakar dan Web

Designing car audio that fits user’s needs is a fun activity. However, the design often consumes more time and costly since it should be consulted to the experts several times. For easy access to information in designing a car audio system as well as error prevention, an car audio system based on expert system and web is designed for those who do not have sufficient time and expense to consult directly to experts. This system consists of tutorial modules designed using the HyperText Preprocessor (PHP) and MySQL as database. This car audio system design is evaluated uses black box testing method which focuses on the functional needs of the application. Tests are performed by providing inputs and produce outputs corresponding to the function of each module. The test results prove the correspondence between input and output, which means that the program meet the initial goals of the design.

Noise Analysis and Eliminate Countermeasures for Car Audio System

Automobile traffic has become the financial, entertainment, office and communications function as one of the mobile sites. In automotive design and manufacturing and modification, eliminating the noise of car audio systems to improve driving safety and the occupants enjoy audio and video quality is very important. This paper analyzes the car audio system composition, explains automobile noise is divided into mechanical noise and circuit system inner noise, circuit system noise inside mainly includes thermal noise, induction noise and transmission noise, and puts forward the relevant measures to reduce noise.