B&K 2250 Light, Руководство пользователя

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Chapter 13
Tone Assessment Option BZ-7231
– 1/3-octave Method
13.1 General
Tone Assessment Option BZ-7231 includes tone assessment according to the ISO standard. It
allows assessment of tones on-site.
The result of the tone assessment is the adjustment to be added to the L
Aeq
as described in the
standard for calculating rating level.
BZ-7231, when used with 1/3-octave Frequency Analysis Software BZ-7132 and Logging
Software BZ-7133, allows you to:
• Assess tones in a measured 1/3-octave spectrum according to ISO 1996:2007, Annex D
Tone Assessment Option BZ-7231 brings results to the user on-site as well as preparing for
post-processing and reporting back at the office. Documentation can be completed using
Measurement Partner Suite BZ-5503, or the measured data can be exported for post-processing
by Evaluator Type 7820 or other post-processing software such as Microsoft
®
Excel
®
.
Check the About menu to see whether you have the right license to run the Tone Assessment
Option. (The About menu is accessed from built-in help – tap the Help icon on the
Shortcut Bar, then select About .)
If you have purchased 2250 Light together with the software application(s), then the relevant
license(s) comes pre-installed on the analyzer.
If you purchased a separate software application for your 2250 Light, then you have to install
the license on the analyzer. This is done using BZ-5503, please consult the on-line help
included with the BZ-5503 software for instructions on how to install a license.
13.2 Tone Assessment According to ISO 1996-2, Annex D
When assessing noise, it is generally recognised that noise containing audible pure tones is
more annoying than noise with the same A-weighted broadband level that does not contain
audible tones. When assessing noise that contains tones or narrow bands of noise, an