Design of a Digital Audio Equalizer for Automotive Applications
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.
Click to purchase paper 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, $5 for AES members and is free for E-Library subscribers.