| A theoretical frequency band limitation for analog recordings. | |
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MedLine Citation:
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PMID: 19063404 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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Proponents of analog recording techniques have described their superiority over digitally sampled signals in part by referencing a theoretically infinite frequency band response. This is a typical argument used in favoring audiophile grade phonograph records to digitally sampled music. The actual frequency response of any individual transducer cartridge or phonograph record is determined by empirical measurements and is often bounded by electrical noise considerations as well as the physical condition of the record being played. These measured and predicted frequency responses, however, still hold the contention that there is theoretically infinite frequency band content available on perfect analog recordings and that the actual limit on frequency content is simply a result of an imperfect implementation of recording and playback. In this study an equation analogous to the Nyquist sampling theorem is derived using the geometry of a phonograph pickup system and simple calculus to obtain an absolute theoretical frequency limit for analog recordings based on the size of the pickup and the speed at which the time signal is written and read. This equation may prove useful in designing analog recording systems specific to a desired frequency band response. |
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Authors:
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Michael Zucker |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: The Journal of the Acoustical Society of America Volume: 124 ISSN: 1520-8524 ISO Abbreviation: J. Acoust. Soc. Am. Publication Date: 2008 Oct |
Date Detail:
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Created Date: 2008-12-09 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7503051 Medline TA: J Acoust Soc Am Country: United States |
Other Details:
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Languages: eng Pagination: 2572 Citation Subset: IM |
Affiliation:
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ARL-Penn State Acoust., Appl. Sci. Bldg., North Atherton St., State College, PA 16802, mxz174@psu.edu. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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