A perceptually-driven distortion metric for loudspeakers is proposed that is based on a critical-band spectral comparison of the distortion and noise to an appropriate masking threshold. The loudspeaker is excited by a sine-wave signal composed of windowed 0.3 second bursts. Loudspeaker masking curves for sine waves between 20–500 Hz are derived from previously published ones for headphone distortion evaluation and expanded to curves at 1 decibel increments by linear interpolation and extrapolation. For each burst, the ratios of measured distortion and noise levels to the appropriate masking curve values are determined for each critical band starting at the second harmonic. Once this is done the audibility of all these contributions are combined into various audibility values.

Authors: Fielder, Louis; Smithers, Michael
Affiliations: Retired, Millbrae, CA, USA; Dolby Laboratories, Sydney, NSW, Australia(See document for exact affiliation information.)
AES Convention: 147 (October 2019) Paper Number: 10242
Publication Date: October 8, 2019 Import into BibTeX
Subject: Transducers
Permalink: http://www.aes.org/e-lib/browse.cfm?elib=20615

Click to purchase paper as a non-member or login as an AES member. If your company or school subscribes to the E-Library then switch to the institutional version. If you are not an AES member and would like to subscribe to the E-Library then Join the AES!

This paper costs $33 for non-members and is free for AES members and E-Library subscribers.

Learn more about the AES E-Library

E-Library Location:   /conv/147/10242.pdf

Start a discussion about this paper!