Connections between Organ Pipe Noise and Shannon Entropy of the Airflow: Preliminary Results
Possible connections between statistical airflow parameters and amount of noise in the flue organ pipe signal was investigated by means of particle image velocimetry (PIV). Differences between free-run and phase-locked PIV synchronization techniques were discussed. Results show a strong evidence that there is a region in which there is a linear relation between the airflow Shannon entropy H obtained by biorthogonal decomposition of the PIV data and harmonics-to-noise ratio HNR expressed in dB. A preliminary linear relation was received: HNR ≈ –125 H + 77.9.
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Document Type: Research Article
Publication date: November 1, 2017
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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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