Title: +038=243.001-AG002T_02-Deko Silent glass 44 dB Bygginnredning - DOP.pdf
Norsonic-Tippkemper Norsonic-Tippkemper Norsonic-Tippkemper Norsonic-Tippkemper - FG Elektronik Norsonic-TippkemperThe ift Centre for Acoustics participates in comparative measurements at the Physikalisch- Technische Bundesanstalt (PTB) in Braunschweig every three years, the last one was in April 2010. The sound level meter used, Series No. 17848, was calibrated by the Dortmund Eichamt (calibration agency) on 22. January 2009. The calibration is valid until 31 December 2011.2.4TestingDate09. May 2011Test engineerBernd Saß3Detailed resultsThe values of the measured sound reduction index of the tested insulating glass unit are plot- ted as a function of frequency in the annexed data sheet and tabled.As per EN ISO 717-1 the weighted sound reduction index Rw and the spectrum adaptation terms C and Ctr for the frequency range 100 Hz to 3150 Hz obtained by calculation are as follows:Rw (C;Ctr) = 44 (-2;-6) dB