Indicated if one or several bands are excluded. This will violate the A-weighted result of the measurement unless the band is more than 10 dB below the highest A-weighted band. Please consult the standard.

This warning is issued if a band has a measured F_pI > L_d.

This may be avoided by proper calibration, and avoiding measuring a highly reactive sound field. Try to move away from the source or eliminate extranous noise sources to avoid the warning.

This warning is issued if a band has a measured F_pI > L_d on a segment.

This may be avoided by proper calibration, and avoiding measuring a highly reactive sound field. Try to move away from the source or eliminate extranous noise sources to avoid the warning.

The yellow warning is issued for a segment. The measurement is still compliant to the standard if the summed bands in total scope fullfills the requirement. Otherwise, a red warning will be issued.

The difference between the horizontal and vertical scan is larger than the requirement for one or more bands.

Applies only to Engineering grade accuracy.

If either the horiztonal or vertical scan duration is less than 20 seconds, this warning will be issued.

The extranous intensity indicator F_+/- ≥ 3 dB for one or more bands. Applies only to Engineering grade accuracy.

Try to shield the device under test for directive extraneous noise sources.

One or more bands have negative direction intensity/sound power.

Try to shield the device under test from extraneous noise sources.

The Weighted sum frequency range is not set to exactly 50 Hz to 6.3 kHz.

The measurement is not compliant.

The filter bandwidth is not set to minimum the range 31.5 Hz to 10 kHz.

A band failed on repeatability, but the L_W sum of bands with repeatability is more than 10 dB below the highest A-weighted level.

The repeatability warning is automatically negelected.

The field indicator F_pI is larger than 10 dB.

According to the standard, every effort should be made to avoid measuring sound fields this reactive.

Indicates that a frequency band outside the Weighted Sum Frequency Range is less than 6 dB below the total A-weighted value when A-weighted.

The standard states that the uncertainty may not be guaranteed in this case.

Indicates that the A-weighted power from bands [50 Hz to 315 Hz] + 6.3 kHz is larger than the A-weighted power for bands 400 Hz to 5 kHz.

The uncertainty for total A is then invalid, and individual band uncertainties apply.

Indicates that the sound intensity probe has not been phase corrected within the last 24 hours.

Sound Intensity help index