Document Detail

Reed vibration, pressure, and airflow in Western free-reed instruments.
MedLine Citation:
PMID:  18190016     Owner:  NLM     Status:  In-Data-Review    
Western free reed instruments, including the reed organ, harmonium, harmonica, and accordion, use asymmetric free reeds that are able to maintain sustained oscillation in the absence of a pipe resonator. Studies of the motion of air-driven American reed organ reeds and accordion reeds have been made that yield the volume air flow through the reed opening as a function of time. Reed vibration waveforms are obtained using a variable impedance transducer, and corresponding sound pressure waveforms are obtained from a probe microphone at positions near the reed opening on both sides of the reed tongue. The airflow waveform is obtained by integrating the pressure waveform and using a calculated area function and is calibrated using the measured average and minimum airflow rates. The results are compared with earlier preliminary studies as well as recent theoretical work. For pressure and airflow waveforms among different types of reeds or for the same reed at different blowing pressures, differences can be understood in terms of the configuration of the reed and reed frame system, as well as the amplitude of reed vibration. [Research supported by NSF REU Grant No. PHY-0354058.].
Edward L Toussaint; James P Cottingham
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The Journal of the Acoustical Society of America     Volume:  122     ISSN:  1520-8524     ISO Abbreviation:  J. Acoust. Soc. Am.     Publication Date:  2007 Nov 
Date Detail:
Created Date:  2008-01-14     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7503051     Medline TA:  J Acoust Soc Am     Country:  United States    
Other Details:
Languages:  eng     Pagination:  3055     Citation Subset:  IM    
Lawrence Univ., Appleton, WI 54912Coe College, Cedar Rapids, IA 52402.
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