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Conference Paper

Crossover filters pre and post limiters for basic loudspeaker protection: a case study.

Authors: Kalinowski, Marcin; Nucci, Matteo

AES Conference: 2019 AES INTERNATIONAL CONFERENCE ON AUTOMOTIVE AUDIO · Paper 14 · September 2019

Abstract

"For system designs in which an automotive audio amplifier DSP architecture doesn’t account for a specific
loudspeaker protection algorithm, digital crossover filters placed after the limiter block in the signal flow allow
to mitigate the risk of a potential transducer failure due to loudspeakers operating outside of their designated
bandwidth at high excursions. Considering a real-world automotive audio system use case with given filtering
resources and defined DSP flexibility, this paper discusses various choices for crossover parameters selection and
distribution in the system in relation to the limiter block (before and/or after). The impact on loudspeaker bandwidth
and crossover behavior is evaluated for several filter-design parameter changes, at varying reproduction level: such
analysis considers subwoofer, woofer and midrange loudspeaker cases, eventually leading to a best-compromise
design approach."

Details

Published in
AES Conference: 2019 AES INTERNATIONAL CONFERENCE ON AUTOMOTIVE AUDIO
Paper number
14
Publication date
September 6, 2019
Affiliation
Harman Becker Automotive Systems Italy; Harman Becker Automotive Systems Italy (See document for exact affiliation information.)
Type
Conference Paper