B&K 2250 Light Manuel d'utilisateur Page 31

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Hand-held Analyzer Type 2250
Instruction Manual
26
4.6.6 Free-field Frequency Responses for Diffuse-field Calibrated Instruments
According to IEC 60651 and IEC 60804, the free-field frequency response in the reference direction for
diffuse-field calibrated instruments must be specified. This response is given in the “Electrical Re-
sponse” column of Table A.7.
4.7 Directional Response
This section gives directional responses for plane progressive sinusoidal sound waves normalised to the
response in the reference direction.
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