All resistors generate white (Johnson-Nysquist) noise based on their value and temperature; they can also generate several other types of (excess) noise. The amount or characteristics of a resistor’s excess noise could be one factor contributing to variations in perceived sound quality. This research explores methods for measuring the Johnson-Nysquist and excess noise of different resistors with the hopes of quantifying the performance of the components under test. A methodology is proposed for evaluating the audibility of both Johnson-Nysquist and excess noise that requires no special measurement equipment, only a sound system with suitable computer and freely available software.

Authors: LaMacchia, Brewster; Swanson, Bradford
Affiliations: Clockworks Signal Processing LLC, Andover, MA, USA; Tufts University, Medford, MA, USA(See document for exact affiliation information.)
AES Convention: 145 (October 2018) eBrief:486
Publication Date: October 7, 2018
Subject: Posters: Applications in Audio

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