Sound and Vibration Instrument Hire and Calibration

Bruel & Kjaer 2250 + BZ 7231 Tone Assessment

The B&K 2250 multi-function meter is designed for all sound and vibration measurements, analysis and recording applications. This page describes the optional BZ 7231 Tone Assessment Software

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The BZ 7231 Tone Assessment option used together with the BZ 7230 FFT Analysis option, enables an objective 'in-the-field' assessment of tonal noise components complying with ISO 1996.

The analysis is fully automatic, indicates all tones detected in the measured FFT spectrum, selects the most prominent tone, and immediately delivers all parameters to report. When activated, tone assessment appears as a special cursor mode on the sound level meter.

Automatically configured for ISO 1996
With this option is selected the appropriate measurement configuration is automatically selected, making it easy to set up FFT analysis that follows the ISO 1996–2 standard.

All details instantly
On completion of the measurement, the calculation of tonal parameters for all the possible tonal candidates in the analysis takes only a few seconds, after which the comprehensive list of results (Kt, dLta, Lpn, Lpti, Lpt, and Critical Band) is immediately available. The LAeq is measured simultaneously and the tone corrected rating level can be calculated on the spot.

Help to analyse the right tone
With the headphone output you can listen to a sine tone generated at the cursor position's frequency, and then compare it with the noise you measure - providing an intuitive and fast way to ensure you report data for the correct tone.

More information on : Tone Assessment - the basics

B&K 2250 BZ 7231 Specifications.