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Valve vs. solid-state microphone preamplifier: a comparative study

Stroe, Octavian (2017) Valve vs. solid-state microphone preamplifier: a comparative study. Fields: journal of Huddersfield student research, 3 (1). ISSN 2057-0163

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This paper outlines research carried out to determine the perceptual and objective differences between a solid-state and a valve preamplifier running at low voltages. ABX testing was employed and showed that there were perceivable differences between the two systems. A comprehensive objective analysis was performed, which utilised tests for total harmonic distortion + noise (THD+N), intermodulation distortion (IMD), THD versus frequency and frequency response in order to ensure the two systems were performing in their linear region. In addition, MIRToolbox was utilised to extract low-level features such as spectral centroid, skewness and novelty. The electronic measurements combined with the MIRToolbox support the listeners’ subjective descriptors that there is a difference in brightness and harmonic content between the two types of preamplifiers. A correlation theory was developed, which linked the objective and the subjective measurements.

Item Type: Article
Uncontrolled Keywords: Valves; solid-state; preamplifiers; objective and subjective measurements; THD+N; IMD; spectral centroid; skewness;
Subjects: T Technology > T Technology (General)
T Technology > TA Engineering (General). Civil engineering (General)
Schools: School of Computing and Engineering
Teaching and Learning Institute
Depositing User: Megan Taylor
Date Deposited: 28 Feb 2017 11:57
Last Modified: 28 Mar 2018 09:00


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