Regime Change Thresholds in Recorder-Like Instruments: Influence of the Mouth Pressure Dynamics
In the recorder, variation in blowing pressure can produce changes between playing regimes and thus jumps from one note to another. In this paper, such transitions are compared for a recorder played by an experienced player, a person with no playing experience, and an artificial mouth. The experienced player is observed to shift regime change thresholds up to 240% and 292% compared to the artificial mouth and the non musician (respectively), and thus to enlarge the control of nuances and spectrum. The hypothesis that the dynamics (i.e. rate of change) of the blowing pressure influences regime change thresholds is tested experimentally using an artificial mouth and numerically through time-domain simulations of a physical model of the instrument. Regime change thresholds are compared for both linearly varying blowing pressure profiles with different slopes and for piecewise linear ramps of the blowing pressure (including a slope change). The results highlight a strong dependence of thresholds on the blowing pressure dynamics. A phenomenological model of the register change that predicts regime change as a function of the rate of change of the blowing pressure is proposed. It gives good agreement with experimental data and simulations.
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Document Type: Research Article
Publication date: March 1, 2015
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- Acta Acustica united with Acustica, published together with the European Acoustics Association (EAA), is an international, peer-reviewed journal on acoustics. It publishes original articles on all subjects in the field of acoustics, such as general linear acoustics, nonlinear acoustics, macrosonics, flow acoustics, atmospheric sound, underwater sound, ultrasonics, physical acoustics, structural acoustics, noise control, active control, environmental noise, building acoustics, room acoustics, acoustic materials, acoustic signal processing, computational and numerical acoustics, hearing, audiology and psychoacoustics, speech, musical acoustics, electroacoustics, auditory quality of systems. It reports on original scientific research in acoustics and on engineering applications. The journal considers scientific papers, technical and applied papers, book reviews, short communications, doctoral thesis abstracts, etc. In irregular intervals also special issues and review articles are published.
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