Investigations on the balloon as an impulse source

Measurements of impulses produced by bursting balloons are presented. Various sizes of balloons were popped with a mechanical device in an anechoic chamber and recorded with a spherical microphone array. The power responses and directivity of the balloons are analyzed. Results indicate that power re...

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Bibliographic Details
Published in:The Journal of the Acoustical Society of America 2011-01, Vol.129 (1), p.EL27-EL33
Main Authors: Pätynen, Jukka, Katz, Brian F.G., Lokki, Tapio
Format: Article
Language:English
Subjects:
Acoustical measurements and instrumentation
Acoustics
Acoustics - instrumentation
Architectural acoustics
Engineering Sciences
Equipment Design
Exact sciences and technology
Facility Design and Construction
Fundamental areas of phenomenology (including applications)
Models, Theoretical
Motion
Physics
Sound
Sound Spectrography
Time Factors
Transducers
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Summary:Measurements of impulses produced by bursting balloons are presented. Various sizes of balloons were popped with a mechanical device in an anechoic chamber and recorded with a spherical microphone array. The power responses and directivity of the balloons are analyzed. Results indicate that power responses have two emphasized frequencies which depend on balloon size and inflation level. Larger balloons radiated more energy and higher inflation levels resulted in stronger high frequency content. Balloon directivity patterns are stable over repetitions. However, balloons do not radiate omnidirectionally. The degree of omnidirectionality improves with balloon size and for midrange frequencies.
ISSN:0001-4966
1520-8524
DOI:10.1121/1.3518780