Vibrations of the Air Column and the Reed in the Clarinet
作者:
John Backus,
期刊:
The Journal of the Acoustical Society of America
(AIP Available online 1960)
卷期:
Volume 32,
issue 11
页码: 1493-1493
ISSN:0001-4966
年代: 1960
DOI:10.1121/1.1935149
出版商: Acoustical Society of America
数据来源: AIP
摘要:
A small condenser microphone inserted into the mouthpiece of a clarinet enables the vibrations of the air column to be observed. At low intensities the pressure variation in the mouthpiece is practically sinusoidal; at higher intensities harmonics increase in amplitude, but the fundamental still predominates. The sound pressure level inside the mouthpiece for loud tones reaches 166 db; this checks well with the pressure required for blowing the instrument. Simultaneous observations of mouthpiece pressure and reed displacement show that, during that part of its motion that it is not in contact with the mouthpiece, the reed follows quite faithfully the pressure variations. The reed itself is primarily stiffness controlled; however, the damping of the reed motion by the player's lip is a very important factor in the performance of the instrument. The influence of the reed on the pitch of the tone produced by the instrument will be discussed.
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