48 Bedrock SMxx operating manual © Bedrock Audio BV, 2019
Along with each measurement value, the reliabily status is display (acceptable, warning,
error). The stored data for each measurement (downloadable via USB) contains more de-
tails on the exact motivation for the indicated reliability status. This is indicated with the
following letter codes:
- d: no data was present (error)
- r: not enough range (warning)
- b: bandwidth-time product too low (error)
- n: snr too low (warning)
- s: start time before knee point of the decay curve (warning)
- c: correlation of the decay curve fit is low (warning or acceptable, depending on value)
Multiple letter codes may be stored with a single measurement value.
The description in this section was based on the interrupted noise method. The procedure
is similar for the IR-based method: after pressing “arm,” generate the impulsive sound (fire
a starter gun) to automatically trigger the measurement.
Note that the method used is indicated alongside the decay graph (in gray vertical text).
RT60 decay curves plotted once the measurement is completed (impulse response method)
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