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Engineering Brief

Profiling loudspeaker nonlinearities using parametric multitone stimulus

Authors: Voishvillo, Alexander; Kakonyi, Balazs; McLaughlin, Brian

AES Convention 149 · Paper 615 · October 2020

Abstract

The previous work reported on the use of modulated musical multitone (MMM) for the detection of audible distortion in horn drivers. With an adjustable crest factor, MMM is designed to match the properties of music and is used to measure nonlinear distortion audibility thresholds. In this work, the signal is used to create a distortion profile of two-way systems for comparison. The MMM reaction is post-processed to obtain the Multitone Total Nonlinear Distortion response, which presents nonlinear distortion products averaged in a “sliding window” in the frequency domain. MTND responses are derived from a low level to a very high level. These MTND curves are compiled into a comprehensive spectral distortion profile which can be used to compare multiple systems.

Details

Published in
AES Convention 149
AES Convention
149
Paper number
615
Publication date
October 6, 2020
Session subject
Audio Applications and Technologies
Affiliation
Harman Professional Solutions, Northridge, CA, USA (See document for exact affiliation information.)
Type
Engineering Brief