Weighting and Filtering VIs
Edition: November 2008
Part #: 372416B-01
» View Sound and Vibration Info
Owning Palette: Sound and Vibration 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 and Filtering VIs to apply a weighting filter on time-domain signals sampled at specific rates. You can choose from acoustic, telecommunication, radiocommunication, and human vibration 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 and Filtering 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 |
|---|---|
| OAT FIR Preprocess Filter | Designs an FIR filter and filters the scaled signal. The data type you wire to the scaled signal [EU] input determines the polymorphic instance to use. |
| OAT IIR Preprocess Filter | Designs an IIR filter and filters the scaled signal [EU]. The data type you wire to the scaled signal [EU] input determines the polymorphic instance to use. |
| SVL Integration | Converts acceleration to velocity or displacement. The data type you wire to the scaled signal [EU] input determines the polymorphic instance to use. |
| 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 Human Vibration Weighting Filter (Fixed Rates) | Applies the selected human vibration weighting to a scaled signal expressed in engineering units. 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 |
|---|---|
| Frequency-Domain Weighting VIs | Use the Frequency-Domain Weighting VIs to apply a weighting filter on frequency spectra. You can choose from acoustic, telecommunication, radiocommunication, and human vibration filters. |
| Octave Weighting VIs | Use the Octave Weighting VIs to apply a weighting filter on octave spectra. You can choose from acoustic, telecommunication, radiocommunication, and human vibration filters. |
| 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. |