SVL Leq Sound Level VI

SVL Leq Sound Level VI

Owning Palette: Sound Level VIs

Requires: Sound and Vibration Toolkit

Computes the linear averaged, or the equivalent continuous sound level (Leq), of scaled signal [EU]. scaled signal [EU] should have a zero DC component. You can attenuate the DC component with hardware AC-coupling filters and with software high-pass filters. Wire data to the scaled signal [EU] input to determine the polymorphic instance to use or manually select the instance.

The Sound Level VIs return respective sound pressure levels in dB rms relative to the reference. By default, a sound pressure level of 20 uPa rms is used as the reference for conversion to dB. In contrast, peak and peak-to-peak sound pressure levels are referenced to 20 uPa pk.

SVL Leq Sound Level (1 Ch)

	scaled signal [EU] specifies the scaled signal expressed in the selected engineering units. To obtain a properly scaled signal, you can use the SVL Scale Voltage to EU VI or define a virtual channel in National Instruments Measurement & Automation Explorer (MAX). t0 specifies the start time of the waveform. dt specifies the time interval in seconds between data points in the waveform. Y specifies the data values of the waveform.
	error in describes error conditions that occur before this node runs. This input provides standard error in functionality.
	restart averaging specifies if the selected averaging process has to be restarted. The default is FALSE. When you call this VI for the first time, the averaging process restarts automatically.
	Leq sound level [dB EU] returns the equivalent continuous sound pressure level (Leq) expressed in decibels.
	unit label returns the selected engineering units.
	error out contains error information. This output provides standard error out functionality.

SVL Leq Sound Level (N Ch)

	scaled signals [EU] specifies the scaled signals expressed in the selected engineering units. To obtain a properly scaled signal, you can use the SVL Scale Voltage to EU VI or define virtual channels in National Instruments Measurement & Automation Explorer (MAX). t0 specifies the start time of the waveform. dt specifies the time interval in seconds between data points in the waveform. Y specifies the data values of the waveform.
	error in describes error conditions that occur before this node runs. This input provides standard error in functionality.
	restart averaging specifies if the selected averaging process has to be restarted. The default is FALSE. When you call this VI for the first time, the averaging process restarts automatically.
	Leq sound levels [dB EU] returns the equivalent continuous sound pressure levels (Leq) expressed in decibels.
	unit labels returns the selected engineering units for each channel.
	error out contains error information. This output provides standard error out functionality.