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BS EN 1793-1-1998
Laermschutzeinrichtungen an Strassen. Pruefverfahren zur Bestimmung der akustischen Eigenschaften. Produktspezifische Merkmale der Schallabsorption Road Traffic Noise Reducing Devices-Test Method for Determining the Acoustic Performance Part 1:Intrinsic Characteristics of Sound Absorption Dispositifs de reduction du bruit du trafic routier. Methode d'essai pour la determination de la performance acoustique. Caracteristiques intrinseques relatives a l'absorption acoustique
适用范围：This standard specifies the laboratory method for measuring the sound absorption of flat noise barriers or flat cladding for retaining walls or tunnels. It covers the assessment of the intrinsic sound absorption performance of roadside noise reducing devices which can reasonably be assembled inside the testing facility described in EN 20354. The test method in EN 20354, referred to in this standard, is strictly valid only for plane absorbers and in particular excludes devices which act as weakly damped resonators. Some devices will depart significantly from these requirements and in these cases care is needed in interpreting the results.
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