Instruction Manual

Sound Level Meter Types 2245 – Instruction Manual Page 47 of 110
Fig. 4.5 Diffuse-field frequency response for the sound level meter. Corresponds
to the “Acoustical Response” column in Table A. 4.
Fig. 4.6 Diffuse-field frequency response for the sound level meter with
Windscreen UA-1650. Corresponds to the “Acoustical Response” column in
Table A. 5.
4.6.6 Free-field Frequency Responses for Diffuse-field Calibrated Instruments
According to IEC 60651 and IEC 60804, the free-field frequency responses in the
reference direction for diffuse-field calibrated instruments must be specified. These
responses are given in Table A. 6.