Title: Reference level in ISO 3382 parameters: G, ST, L and STI
Abstract: In the room acoustic parameters Sound Strength (G, LJ), Support (STearly and STlate) as described in ISO 3382-1 and parameters Lp,A,S,4 m and STI as described in ISO 3382-3, a reference sound level is part of the parameter definition. For most parameters, a laboratory sound power calibration is required. Different types of laboratory calibration methods are described in ISO 3382-1, but research has shown that they may yield different results. In the ST parameters, for every single measurement an attempt is made to determine the free field sound level at 1 m distance by windowing. Some researchers and engineers have investigated the possibility of using such in situ reference measurements for all parameters, to avoid the necessity of laboratory calibration. However, there seems to be little agreement on which method is most accurate, most reproducible and at the same time sufficiently practical. In this paper, the figures as presented on the DAGA conference poster are explained. Differences and uncertainties in methods are discussed.
Publication Year: 2014
Publication Date: 2014-01-01
Language: en
Type: article
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