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Research at St Andrews

Experimental techniques for the visualization of the acoustic fields radiating from brass musical instruments

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Author(s)

Amaya López-Carromero, Jonathan Andrew Kemp, Murray Campbell

School/Research organisations

Abstract

Radiation from brass instrument bells under artificial excitation can be visualized using a number of experimental techniques. In this work, we present two different approaches: Schlieren optical imaging using a high speed camera and acoustic 2D scanning using a linear microphone array. The potentials and limitations of both methods, as well as their methodological requirements, are discussed. Examples of measurements on several instruments are presented. Schlieren optical imaging is applicable for the detection of large amplitude wavefronts formed by nonlinear wave steepening and is this is particularly sensitive to the high frequencies that form within these waves. The 2D scanning linear microphone array on the other hand can, in principle, measure all frequencies and the use of the exponential sine sweep method allows any nonlinear behaviour (in the loudspeaker and microphone or in the air) to be removed to get an accurate measurement of the linear radiation field for any frequency of choice within the measurement bandwidth.
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Details

Original languageEnglish
Title of host publicationPROCEEDINGS OF THE 174TH MEETING OF THE ACOUSTICAL SOCIETY OF AMERICA
PublisherAcoustical Society of America
Number of pages4
Publication statusPublished - Oct 2017
EventTHE 174TH MEETING OF THE ACOUSTICAL SOCIETY OF AMERICA - New Orleans Marriott Hotel, New Orleans, United States
Duration: 4 Dec 20178 Dec 2017
https://acousticalsociety.org/174th_meeting/

Conference

ConferenceTHE 174TH MEETING OF THE ACOUSTICAL SOCIETY OF AMERICA
CountryUnited States
CityNew Orleans
Period4/12/178/12/17
Internet address

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ID: 261371696

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