high pass filter option for SPL data?

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pschnob

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Sep 24, 2019
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Hi,
I need to see the SPL level (Flat, C, A), preferably in RTA mode, just above 125Hz but I'm not seeing any High Pass Filter option for the SPL reporting like there is for the Distortion Calculations?

Is there such an option or plug-in to enable this?

I recognize I can read the levels of each octave (in 1/1 Octave mode) but that doesn't tell me what the summed SPL is for all of the octaves >125Hz.

Any assistance would be most welcome!
Best Regards,
pschnob
 
Wayne A. Pflughaupt

Wayne A. Pflughaupt

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Not sure if they can be applied for data logging, but the weighting filters function much like high pass filters.

1920px-Acoustic_weighting_curves_%281%29.svg.png


Regards,
Wayne
 
John Mulcahy

John Mulcahy

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The RTA total levels correspond to the range specified in the distortion limits and include unweighted, C weighted and A weighted figures. Here is the relevant extract from the help:

The current Input RMS value is shown to the left of the record button, in dB SPL, dBFS, dBu, dBV, dBW, volts or watts according to the setting of the Y axis. This figure excludes any DC content in the signal. A and C weighted values are shown below the unweighted rms figure. All three figures are calculated over the range specified by the distortion LP and HP settings, if either or both are enabled. The peak sample value in the last RTA block is shown in dBFS. Below that are the in-band (22.4 Hz to 22.4 kHz) and, for sample rates above 44.1 kHz, out of band (> 22.4 kHz) unweighted RMS levels. If clipping is detected in the input the RMS value turns red. If the RTA is in one octave mode Noise Criterion and Noise Rating figures will be shown below the RMS values.
 
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