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Über die akustische Kopplung der Pfeifen bei der Or gel

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It is verified, by measuring the range of frequency pulling of two acoustically coupled pipes under different coupling conditions, that the part of the coupling through the keychamber is negligibly small compared to the coupling between the lips through to outside air.

The very small coupling through the keychamber is due to the high damping which is caused by the large variation in cross section of the transmission system.

Pipes with the same fundamental tone have the best coupling through the outside air. The coupling decreases with growing distance between the fundamental tones (e.g. diapason 8′ + octave 4′) because of the decreasing intensities of the overlapping harmonics. Practically there is no more coupling between a stopped pipe 8′ and the octave 4′, as there is no overlapping of harmonics.
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Document Type: Research Article

Publication date: January 1, 1961

More about this publication?
  • 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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