Measurement of nonlinear and Doppler distortion in Distributed Mode Loudspeakers

Distributed Mode Loudspeakers (DMLs), as other electroacoustic transducers with electrodynamic excitation, are susceptible to the occurrence of nonlinear distortion. The literature on nonlinear distortion in DMLs is scarce. The vibrations of the DML panel are very small in amplitude, thus the coil e...

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Bibliographic Details
Published in:International Journal of Electronics and Telecommunications
Main Authors: Karol Czesak, Piotr Kleczkowski
Format: Article in Journal/Newspaper
Language:English
Published: Polish Academy of Sciences 2024
Subjects:
dml
loudspeaker characteristics
loudspeaker measurements
nonlinear distortion
doppler effect
Electrical engineering. Electronics. Nuclear engineering
TK1-9971
Telecommunication
TK5101-6720
DML
Online Access:https://doi.org/10.24425/ijet.2024.149564
https://doaj.org/article/9dcd1ec0057448e4ab5aba09c222665b
Description
Summary:Distributed Mode Loudspeakers (DMLs), as other electroacoustic transducers with electrodynamic excitation, are susceptible to the occurrence of nonlinear distortion. The literature on nonlinear distortion in DMLs is scarce. The vibrations of the DML panel are very small in amplitude, thus the coil excursion of the exciter is low, which is a favorable condition for low nonlinear distortion. The scope of this paper covers investigation of harmonic and intermodulation distortion, occurring in the DML. The harmonic distortion was examined with two methods and the intermodulation distortion – with three, including one author’s proposed method. The result indicate, that nonlinear distortion in DMLs may be a bigger problem than those in diaphragm loudspeakers.

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