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In Reply to: Tubes are the way to go. Also a question about measuring distortion, anybody. posted by phenderson on April 21, 2002 at 17:42:16:
Journal of the AES - Table of Contents
2001 November, Vol 49 Number 11Multitone Testing of Sound System Components-Some Results and Conclusions, Part 1: History and Theory
Eugene Czerwinski, Alexander Voishvillo, Sergei Alexandrov, and Alexander Terekhov 1011
Evaluating nonlinear distortion in audio equipment, most notably loudspeakers, has been a constant topic of discussion because of the lack of progress in finding objective measures that correlate with subjective judgments. A comprehensive review of the literature spanning over 100 years illustrates the subject's intractable nature. A more formal analysis then leads to the conclusion that a carefully constructed multitone signal both simulates real music and allows for a mathematical theory that predicts the intermodulation products. This provides the basis for transforming the distortion products into compact metrics. THD is a useless metric.1st part:
Over 100 refs, (including Risch multitone test) mentions Thorstens’ favorites: “noise fill†tests
Emphasizes multi-dimensional nature of distortion, shows THD just don’t do itin 2nd par: measured multitone distortion in horn drivers
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Follow Ups
- Distortion review article - Must Read ! - jcox 20:37:23 04/22/02 (1)
- Re: Distortion review article - Must Read ! - Jon Risch 21:24:23 04/25/02 (0)
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