Bedrock SM30, Руководство по эксплуатации

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22 Bedrock SMxx operating manual © Bedrock Audio BV, 2019
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• To enter a specific noise spectrum, simply tap each octave band field on the
“additive noise” screen and enter the corresponding octave band level
• Alternatively, you can do a measurement (without STIPA signal playing!) of
the current background noise. Although the STI value will be meaningless,
the noise spectrum will be measured accurately. Save the measurement, and
then press “take from last measurement” (
) on the “additive noise”
screen. The spectrum now represents the noise spectrum just measured.
• If you enter an A-weighted value after pressing the “A-wgt” field, all bands
will be increased with an equal amount until the A-weighted level is
matched. This is a quick way to lower or increase the overall level, and
also to generate a pink noise spectrum of a given A-weighted level (as the
default spectrum shown is pink).
• The buttons “-1 dB” and “+1 dB” adjust the levels in all bands by 1 dB.
You can browse through all measurements saved earlier in the “browse measurements”
screen. The following tips and pointers may be useful to remember when browsing STI
measurements with Quick STIPA and STIPA Pro:
• Measurements saved in Quick STIPA can be browsed in STIPA pro, and
vice versa. The measurement numbering range is shared between these
modules. This means that you can use STIPA pro to investigate measure-
ments done with Quick STIPA in more detail using the browsing screen in
STIPA pro.
• The settings you choose in STIPA pro (additive noise, level dependent
masking) affect the current measurement, but also affect which data is
shown in the measurement browser. This means that you can always enter
a noise spectrum and see how this affects measurements you did earlier
on. Similarly, you can go back later on and see what affect level dependent
masking has for a certain measurement.
• All data for each measurement is always saved - including any data not
actually shown during the measurement itself, including the time and date.
• Measurements can also be retrieved over USB; please refer to the section
“accessing saved measurements on a PC” for further instructions. For larger
numbers of measurements, processing of these saved data files (e.g. through
worksheet software) may be more efficient than inspection through the
measurement browser.
• If you wish to reset the measurement number (restarting at number 1), you
need to connect the device to a PC. Remove all measurement files (.CSV)
from the directory STIPA, as well as the file _INDEX.DAT.