The project delas with the design and realization of a dedicated board for the processing of audio signals for automotive applications, named DIGIcar. It features two stereo inputs (24 bit resolution) and two stereo outputs. The prototype was realized in a 4 layer PCB with SMD components. The DIGIcar board was tested stand-alone with an Audio Precision System 2022. Experiments were performed inside a car too, where the DIGIcar board was interfaced with a four channel power amplifier and connected between audio source and car loudspeakers. A development tool in MATLAB was exploited in order to synthesize the suitable equalizing filters, given standard acoustic car measurements. Then the filters are stored in the board FLASH EEPROM. A few options are available to tailor the equalizer for differen cars. Listening tests and acoustic measurements show the effectiveness and the functionality of the designed board.

Authors: Bellini, Alberto; Tesauri, Monica; Ugolotti, Emanuele; Carpanoni, Eraldo; Frassi, Giacomo
Affiliations: University of Parma, Parma, ITALY ; ASK Industries, ITALY(See document for exact affiliation information.)
AES Convention: 112 (April 2002) Paper Number: 5542
Publication Date: April 1, 2002 Import into BibTeX
Subject: Automotive Audio
Permalink: https://www.aes.org/e-lib/browse.cfm?elib=11412

Click to purchase paper as a non-member or login as an AES member. If your company or school subscribes to the E-Library then switch to the institutional version. If you are not an AES member and would like to subscribe to the E-Library then Join the AES!

This paper costs $33 for non-members and is free for AES members and E-Library subscribers.

Learn more about the AES E-Library

E-Library Location: (CD aes19)   /pp2002/pp0205/000098.pdf

Start a discussion about this paper!