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Banjo Drum Physics — sound experiments and simple acoustics demos

Politzer, David (2018) Banjo Drum Physics — sound experiments and simple acoustics demos. , Pasadena, CA. (Unpublished) https://resolver.caltech.edu/CaltechAUTHORS:20180622-115746293

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Abstract

11" D mylar heads over a normal range of tensions (DrumDial 85 to 91) and “open-back” backed pots of depths 2", 2 3/4", and 5 5/8" are studied over the range 100 to 2000 Hz. Normal modes and resonant frequencies of the heads and of the pot air separately are easily identified and agree with simple expectations. The present focus is the head ↔ pot air interaction. There is no "gold-plated" example of a pair of head–air interacting modes that are distant in frequency from all others. (Had there been such a pair, their interaction could have been isolated and studied in detail.) Nevertheless, there are a few cases where there are hints of the kind of interactions expected from a simple theory. The investigations also offer several examples of banjo physics, including aspects of bridge position and rim flexibility, and some dramatic examples of the perils of sound recording, including floor bounce and room sound.


Item Type:Report or Paper (Discussion Paper)
Related URLs:
URLURL TypeDescription
http://www.its.caltech.edu/~politzer/air-head-exp/air-head-exp.pdfAuthorDiscussion Paper
http://www.its.caltech.edu/~politzer/air-head-exp/4-versions.mp3Authorsound sample of the extreme versions of the banjos used
http://www.its.caltech.edu/~politzer/air-head-exp/open-shallow-9-across.mp3Authorthe sound of taps across the center of a head, from one side to the other
https://arxiv.org/abs/1806.08857arXivDiscussion Paper
ORCID:
AuthorORCID
Politzer, David0000-0002-4983-6621
Contact Email Address:politzer@theory.caltech.edu
Other Numbering System:
Other Numbering System NameOther Numbering System ID
HDP18-02
Record Number:CaltechAUTHORS:20180622-115746293
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20180622-115746293
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:87330
Collection:CaltechAUTHORS
Deposited By: H. Politzer
Deposited On:26 Jun 2018 19:56
Last Modified:03 Oct 2019 19:54

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