Bruel & Kjaer 2250 Sound Recording Option - BZ 7226
The B&K 2250 is a multi-function meter, for other options and accessories click a link
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B&K 2250 - Home Page B&K 2250 - Summary Table B&K 2250 - Specifications Options and software included BZ 5503 - PC - Utility Software BZ 7222 - Sound Analysis Software BZ 7223 - Frequency Analysis Software BZ 7224 - Logging Software BZ 7226 - Sound Recording Software - this page |
Other options available BZ 7225 - Enhanced Logging Software BZ 7227 - Reverberation Time Software BZ 7228 - Sound Insulation Software BZ 7230 - FFT Measurement Software BZ 7231 - Tonal Assessment Software |
| Accessories etc., Environmental and Factory Noise Kits and other popular accessories |
| B&K 2250 Sound Recorder Option - BZ 7226 | included with all our 2250 meters |
The Sound Recording option - BZ 7226 is delivered with all our 2250 analyzers. It works with all other software modules. In all cases it allows you to make audio recordings of the actual measured signal, using the precision microphone signal used for measurements, not be confused with recorded voice annotations, which uses the commentary microphone. However, its detailed working is dependent upon which other software module is enabled and running. In any case, audio recordings are automatically attached to the measurement and kept with it, even after transfer of the data to a PC.
For sound level recording as opposed to audio recording see the BZ 7224 - Sound Logging Software
The purpose of the Sound Recorder Option is to let you record the measurement signal in order to identify and document sound sources, for example:
The measured LAeq at 57 dB, did it actually stem from the rather distant compressor, or from other sources such as nearby birds or traffic? Not necessarily easy to evaluate on-site, very difficult to document convincingly later. However If the signal is recorded the evidence is beyond doubt.
Is it really true that this noise is impulsive and should be penalized accordingly? If the signal is recorded: There may still be some discussion, but it is based on clear facts.
High levels were identified while no operator was present. Did they originate from the plant under investigation or from another source. If the signal is recorded: No discussion.
With the Sound Level Meter Software - BZ 7222, which is included, and Frequency Analysis Software - BZ 7223, also included: the Sound Recording Option BZ 7226 basically lets you do the following:
Record all or parts of the measured sound giving rise to specific results, levels and spectra.
Set up your instrument so that the noise recording can be set to start automatically when the measurement is started, or you can initiate recordings manually.
With Logging Software - BZ 7224, included and Enhanced Logging Software - BZ 7225, an additional option you need to order if required, then additional features are available:
Sound Recording may be associated with the Event Marker. Use the Event key or set an Event marker on the profile display: The sound during the event is recorded and attached to the appropriate part of the profile.
Automatic detection of events based on the levels exceeded is also possible, meaning that recordings can also be initiated when no operator is present.
To see the various 'options' at-a-glance' see the BK 2250 - Summary Table.
In all of the above cases the maximum duration of the sound recordings can be set (Type 2250 is only limited by available storage on the memory card currently in use). Sound recording obviously requires large amounts of storage, therefore Sound Recorder Option BZ 7226 allows you to decide on the trade-off between storage needed and recording quality (sampling rate). The actual audio recording time depends on the quality setting i.e. high, low or medium + the other data being stored, so it is not straight forward. However the software in the meters calculates the actual figures for you when you enter your setup.
We also have a B&K spreadsheet for estimating 2250 memory use - right click here to download it to your PC.
B&K 2250 Sound Recording Specifications.
* Our standard hire charges are based on a 4-day minimum period, details other options.
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