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Author Emanuele, Angelo Farina ♦ Ugolotti, Emanuele ♦ Bellini, Alberto ♦ Cibelli, Gianfranco ♦ Mor, Carlo
Source CiteSeerX
Content type Text
File Format PDF
Language English
Subject Domain (in DDC) Computer science, information & general works ♦ Data processing & computer science
Subject Keyword Numerical Model ♦ Measurement Result ♦ Non-linear Distortion ♦ Loudspeaker Linear ♦ Memory Cell ♦ Commercial Woofer ♦ Digital Prefiltering ♦ Generic Non Linear Structure ♦ Inverse Numerical Filter ♦ Computational Time ♦ Electrical Signal ♦ Audio Signal Source ♦ Electro-acoustic Conversion ♦ Power Amplifier ♦ Effective Compensation ♦ Non-linear Loudspeaker Model ♦ Memory Space ♦ Digital Signal Processor ♦ Filter Structure ♦ Small-thiele Equation ♦ Multirate Architecture ♦ Noticeable Reduction ♦ Low Frequency Behavior
Description Proc. DAFX-98
In this paper a non-linear loudspeaker model, which accurately reproduces the low frequency behavior, is presented. This description, derived from an extension of the well known Small-Thiele equations, requires far less computational time and memory space than generic non linear structures. Moreover a noticeable further reduction of the number of operations and of the memory cells required has been achieved by means of a multirate architecture. Inversion of the proposed model allows digital prefiltering of the electrical signal in order to compensate for the nonidealities of the electro-acoustic conversion. The above filter structure implemented on a digital signal processor, placed between the audio signal source and the power amplifier allows effective compensation of loudspeaker linear (both magnitude and phase) and non-linear distortion. Measurement results obtained with a commercial woofer are discussed 1 Introduction In this paper a numerical model of the non-linear be...
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research
Education Level UG and PG ♦ Career/Technical Study
Learning Resource Type Article
Publisher Date 1998-01-01