A simple dynamics experiment based on acoustic emission

This paper describes a simple experiment well suited for an undergraduate course in mechanical measurements and/or dynamics, in which physical information is extracted from an acoustic emission signature. In the experiment, a ping–pong ball is dropped onto a hard table surface and the audio signal r...

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Bibliographic Details
Published inMechatronics (Oxford) Vol. 12; no. 2; pp. 229 - 239
Main Author Nagurka, Mark L
Format Journal Article Conference Proceeding
LanguageEnglish
Published Oxford Elsevier Ltd 01.03.2002
Elsevier Science
Subjects
Acoustic signal processing
Acoustical measurements and instrumentation
Acoustics
Aerodynamics
Applied sciences
Engineering education
Exact sciences and technology
Friction
Fundamental areas of phenomenology (including applications)
General aspects
Impact testing
Measurement theory
Occupational training. Personnel. Work management
Physics
Acoustic emission testing
Acoustic measurement
Time of flight method
Dynamic model
Modeling
Mechanical shock
Teaching
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Summary:This paper describes a simple experiment well suited for an undergraduate course in mechanical measurements and/or dynamics, in which physical information is extracted from an acoustic emission signature. In the experiment, a ping–pong ball is dropped onto a hard table surface and the audio signal resulting from the ball–table impacts is recorded. The times between successive bounces, or “flight times”, are used to determine the height of the initial drop and the coefficient of restitution of the impact. The experiment prompts questions about modeling the dynamics of a simple impact problem, including the use of the coefficient of restitution and the importance of accounting for aerodynamic effects.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0957-4158
1873-4006
DOI:10.1016/S0957-4158(01)00063-0