Active Noise Control for Hearing Protection using a Lowpower Fixed Point Digital Signal Processor

Document type: Conference Papers
Peer reviewed: Yes
Full text:
Author(s): Benny Sällberg, Lars Håkansson, Ingvar Claesson
Title: Active Noise Control for Hearing Protection using a Lowpower Fixed Point Digital Signal Processor
Conference name: IWAENC (International Workshop on Acoustic Echo and Noise Control)
Year: 2005
City: Eindhoven
Organization: Blekinge Institute of Technology
Department: School of Engineering - Dept. of Signal Processing (Sektionen för teknik – avd. för signalbehandling)
School of Engineering S- 372 25 Ronneby
+46 455 38 50 00
http://www.tek.bth.se/
Authors e-mail: bsa@bth.se
Language: English
Abstract: This contribution presents a fixed point implementation for acoustical active noise control in hearing defenders. The well known filtered-x least mean squares structure is conformed to fixed point arithmetic and evaluated in real time. The measured performance of the implementation is 20dB to 30dB attenuation of broad band noise and ca 60dB for sinusoidal interference. The implementation uses a low power fixed point digital signal processor and is well suited for industry application.
Subject: Signal Processing\Active Noise and Vibration Control
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