Prediction of pitch effects from measured CO2 content variations in wind instrument playing
نویسنده
چکیده
The effect of carbon dioxide (CO2) exhaled by wind instrument players on the resulting pitch is investigated. A theoretical-numerical approach is applied to determine the dependence of sound velocity on the percentage of CO2 contained in the air. Realistic performance data were obtained from experiments in which a professional musician played a clarinet and an oboe, while the CO2 content of exhaled air was recorded together with the audio signal. By calculating the impact of the variation of CO2 and O2 contents on sound velocity, considerable effects on the fundamental frequency of the tones produced are predicted.
منابع مشابه
Measurements of exhaled air effects in the pitch of wind instruments
The present paper deals with measurements of the sounding frequency of wind instruments as a function of the ever-changing gas contents of the player’s respiratory system. During the playing process with a wind instrument, the carbon dioxide level continuously increases, while the oxygen percentage decreases. These two variables are taken into account for the calculation of the expected pitch v...
متن کاملDifferent Types of Pitch Angle Control Strategies Used in Wind Turbine System Applications
The most common controller in wind turbine is the blade pitch angle control in order to get the desired power. Controlling the pitch angle in wind turbines has a direct impact on the dynamic performance of the machine and fluctuations in the power systems. Due to constant changes in wind speed, the wind turbines are of nonlinear and multivariate system. The design of a controller that can ad...
متن کاملThe Prosody of Discourse Structure and Content in the Production of Persian EFL Learners
The present research addressed the prosodic realization of global and local text structure and content in the spoken discourse data produced by Persian EFL learners. Two newspaper articles were analyzed using Rhetorical Structure Theory. Based on these analyses, the global structure in terms of hierarchical level, the local structure in terms of the relative importance of text segments and the ...
متن کاملPitch-Related Identification of Instruments in Classical Music Recordings
Identification of particular voices in polyphonic and polytimbral music is a task often performed by musicians in their everyday life. However, the automation of this task is very challenging, because of high complexity of audio data. Usually additional information is supplied, and the results are far from satisfactory. In this paper, we focus on classical music recordings, without requiring th...
متن کاملSome Effects of the Player's Vocal Tract and Tongue on Wind Instrument Sound
In wind instruments, reeds (including lip reeds) interact with the acoustic impedances of the instrument's bore, Zb and the player's vocal tract, Z t. The bore is usually narrow and has high Q resonances whose maxima in Z b are large and determine the playing regime to first order. The tract has resonances with lower Q which act on a small area of the reed. So how do the weak maxima in Zt affec...
متن کامل