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Journal Article

A Linear Theory of Phonograph Playback

Authors: White, James V.

Journal of the Audio Engineering Society · Volume 19 · Issue 2 · pp. 94–100 · February 1971

Abstract

Previous theories of phonograph playback have been based on the convenient but physically inappropriate assumption that groove deformation can be described using classical elasticity theory. In the present analysis, in contrast, the exact nature of the groove deformation is left unspecified. The mechanical frequency-response function is shown to be uniquely factorable into two transfer functions; a pickup function and a scanning function. The pickup function is calculated for an ideal lumped-element pickup. Also, the magnitude of the average groove deformation that is necessary for maintaining stylus-groove contact continuously is calculated for the case of an ideal recording that contains a pure tone whose frequency is near or above the stylus-groove resonance frequency but low enough that scanning loss can be neglected.

Details

Publication
Journal of the Audio Engineering Society
Volume
19
Issue
2
Pages
94–100
Publication date
February 6, 1971
Affiliation
Department of Mechanical Engineering, Stevens Institute of Technology, Hoboken, NJ (See document for exact affiliation information.)
Type
Journal Article