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Möglichkeiten der normierten Darstellung von Körperschall-Transmissionsgraden an starren rechtwinkligen Plattenstoßsteilen

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For calculating the propagation of structure-borne sound in buildings it is necessary to know the transmission efficiencies at rectangular structural slab-joints for the diffuse incidence of sound. Generally speaking some parts of the structure-borne sound energy are transformed into different wave-types (bending, longitudinal and transverse waves) at these junctions. Using statistical energy analysis for the calculation of the sound propagation the coupling-loss factors are calculated from the transmission efficiencies. Based on a well-known method for calculating the transmission and reflection efficiencies for diffuse sound incidence the possibility is shown how to represent these transmission or reflection efficiencies for stiff-coupled structural slab joints, with identical slabs, as a function of a normalized frequency.

For a symmetrical cross of slabs the transmission efficiencies can be graphically represented with sufficient accuracy as a system of curves. However this will be possible only if no more than one of the three important parameters of a pair of slabs differ from that pair of slabs which is rectangular arranged to it. In a special case empirical equations can be given.


Zur Berechnung der Körperschallausbreitung in Gebäuden werden Transmissionsgrade an rechtwinkligen Plattenverbindungen bei diffusem Schalleinfall benötigt. Im allgemeinen Falle erfolgt an solchen Stoßstellen die Umwandlung eines Teiles der Körperschallenergie in andere Wellenarten (Biegewellen, Longitudinalwellen und Transversalwellen). Bei der Anwendung der statistischen Energieanalyse für die Berechnung der Schallausbreitung werden die Kopplungsverlustfaktoren aus den Transmissionsgraden ermittelt. Ausgehend von einer bekannten Methode zur Berechnung von Transmissions- und Reflexionsgraden bei diffusem Schalleinfall wird gezeigt, daß sich bei Plattenverbindungen aus gleichen Platten mit starrer Kopplung diese Transmissions- bzw. Reflexionsgrade über einer normierten Frequenz darstellen lassen.

Beim einfach symmetrischen Plattenkreuz, und wenn nur einer der drei maßgeblichen Plattenparameter eines Plattenpaares von dem des rechtwinklig dazu angeordneten Plattenpaares abweicht, lassen sich Transmissionsgrade mit ausreichender Genauigkeit als Kurvenscharen darstellen. Im Spezialfall lassen sich auch empirische Formeln angeben.


Pour arriver à calculer la propagation des vibrations dans un bâtiment, il est nécessaire de connaître les coefficients de transmission d'assemblages rectangulaires de plaques en présence de vibrations incidentes diffuses. En général il se produit en de tels emplacements singuliers une transformation d'une partie de l'énergie vibratoire incidente en d'autres modes d'ondes (ondes longitudinales, transversales ou de flexion). A partir des coefficients de transmission on peut calculer les facteurs de pertes dues au couplage en se servant de l'analyse statistique de l'énergie appliquée au calcul de la propagation des vibrations acoustiques. Partant d'un calcul classique des coefficients de transmission et de réflexion sous incidence diffuse, on montre que, dans le cas de jonctions entre plaques identiques et couplage rigide, ces coefficients peuvent se décrire au moyen de fréquences normalisées.

Dans le cas simple d'un assemblage symétrique en croix, et lorsqu'un seul des trois paramètres significatifs d'une paire de plaques diffère de celui de la seconde paire associée, alors les coefficients de transmission peuvent se représenter avec une précision suffisante au moyen de familles de courbes. Dans certains cas particuliers on peut aussi aboutir à des formules empiriques.
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Document Type: Research Article

Publication date: March 1, 1985

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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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