Applications
The sound absorption meter AcoustiAdrienne (measuring system AED 800 + analysis software AED 801) serves the nondestructive measurement of
- sound reflection index and sound absorption coefficient of a noise barrier or a sound screen in situ on the basis of the Adrienne method described in DIN EN 1793-5.
An extension of the sound absorption meter additionally allows the measurement of
- the sound insulation (transmission loss) of a noise barrier or a sound screen in situ according to DIN EN 1793-6 (measuring system AED 810 + analysis software AED 811) as well as
- the sound diffraction at a noise barrier (Miller index) and its crown elements (Miller index difference) according to DIN EN 1793-4 (measuring system AED 820 + analysis software AED 821)
on-site. By means of an adapter, also
- the sound absorption coefficient of a sound absorbing road surface in situ according to DIN ISO 13472-1 (sound absorption coefficient > 0,15) as well as
- the sound absorption coefficient of a noise barrier or a sound screen according to DIN CEN/TS 1793-5 (measuring system AED 830 + analysis software AED 831)
can be determined in situ.
Furthermore, the method is suitable to nondestructively measure the sound absorption coefficient of a sound absorber being installed in a room in order to reduce its reverberation time (e. g. wall absorber, ceiling absorber) as well.
In contrast to the operation of the impedance tube AcoustiTube® , the sound absorption coefficient cannot only be determined for perpendicular sound incidence, but also for statistical sound incidence. By applying a specific model to consider the effect of sound diffraction at edges, these results can be directly compared to measurement results gained in the reverberation chamber according to DIN EN ISO 354.
Analysis software “AcoustiStudio – Module Sound Absorption In Situ” for measurement of sound reflexion index and sound absorption coefficient at noise barriers with sound absorption meter AcoustiAdrienne in situ
Measurement of sound diffraction (Miller index) at noise barrier with crown element (Miller index difference) in situ
