Weighting VIs

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Sound and Vibration Measurement Suite 7.0 Help
Edition: November 2008

Part #: 372416B-01

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Owning Palette: Sound Level VIs

Installed With: Sound and Vibration Measurement Suite. This topic might not match its corresponding palette in LabVIEW depending on your operating system, licensed product(s), and target.

Use the Weighting VIs to apply a weighting filter on time-domain signals sampled at specific rates. You can choose from acoustic, telecommunication, and radiocommunication filters.

The VIs on this palette can return ranges of LabVIEW error codes or specific sound and vibration error codes.

When combined with any National Instruments DSA device, the Weighting VIs offer compliance with the following standards:

A-, B-, and C-Weighting Filters

ANSI Standards

ANSI S1.4-1983
ANSI S1.42-2001

ISO/IEC Standard

IEC 61672-1:2002

JIS Standard

JIS C 1509-1:2005

Radiocommunications Weighting Filters

ITU-R 468-4

Telecommunications Weighting Filters

ITU-T O.41
Bell System Technical Reference 41009

Refer to the examples\Sound and Vibration directory for an example of using the Weighting VIs.

Palette Object	Description
SVT A, B, C Weighting Filter (Fixed Rates)	Applies the selected weighting to scaled signal [EU]. The data type you wire to the scaled signal [EU] input determines the polymorphic instance to use.
SVT Radiocommunications Weighting Filter (Fixed Rates)	Applies the selected weighting filter.
SVT Telecommunications Weighting Filter (Fixed Rates)	Applies the selected weighting filter.

Subpalette	Description
Weighting (Arbitrary Rate) VIs	Use the Weighting (Arbitrary Rate) VIs to apply an A-, B-, or C-weighting filter on time-domain signals and to determine the maximum frequency within tolerances according to the ANSI S1.4 or IEC 61672 standard.