Sound and Vibration Instrument Hire and Calibration
Norsonic 118 Sound Level Meters - Options
| Option 01 : 1/1-octave band filters - real time |
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Parallel 1/1-octave band, real time filters, 8 Hz - 16 kHz
All filters fulfil the IEC 61260 class 1 digital IIR base 10 requirements
120 dB 'one-range' in all filter bands
Graphical and numeric display
A-weighting [pre-weighting] feature available on displayed results
| Option 03 : 1/3-octave band filters - real time |
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Parallel 1/3-octave band, real time filters, 6.3 Hz - 20 kHz
All filters fulfil the IEC 61260 class 1 digital IIR base 10 requirements
120 dB 'one-range' in all filter bands
Graphical and numeric display
A-weighting [pre-weighting] feature available on displayed results
| Option 04 : Calculation of Ln statistical values |
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Calculates 7 fixed Statistical Ln values L1%, L5%, L10%, L50%, L90%, L95% and L99%
Parallel calculation of 1 editable Ln, selectable within the range 0.1% - 99.9%
Statistical calculations based on 0.2 dB class widths covering the entire 120 dB dynamic range
Parallel statistical calculations on both A and C/Z-weighted networks
If the real-time filters are installed (options 1 and 3) the statistical values calculated for the individual filter bands are available as well
| Option 06 : Level versus Time measurements |
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Selection of preset intervals within the 1 second to 99 hours interval range
Automatic level versus time storage of LAeq, LAmax, and
LCpeak or LZpeak
Level versus time measurement continues during a paused Global measurement
Markers identify any pause, stop or continuation of a measurement
Real-time graphical and numeric display of the level versus time results
Simultaneous measurements of Global results i.e. all measured data described for the basic instrument including any of the above options and Profile results based on level versus time values at preset intervals
| Option 08 : Multi-spectrum measurements |
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Automatic level versus time storage of Lfeq and Lfmax for each frequency band in addition to the
LAeq, LAmax and
LCpeak or LZpeak
| Option 09 : Reverberation Time measurement mode |
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Reverberation time measurements based on impulse or noise [option 17] excitation
Calculates both T20 and T30 based on backward integrated decay
Results presented in graphical and table format for all frequency bands
Covers 63 Hz - 8 kHz in 1/1-octave bands
Covers 50 Hz - 10 kHz in 1/3-octave bands
If option 17 is installed then RTs may be measured using noise excitation
| Option 10 : Sound Power measurements - survey method |
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Calculates the survey grade LWA sound power level based on multiple measurement positions on a theoretical hemisphere above a noise source placed on a reflective floor
Automatic correction of
background noise level
Fulfills the requirements of BS EN ISO 3746
| Option 16 : Measurement Trigger |
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Trigger the measurement start based on the internal clock, level threshold or external TTL signal
Level threshold trigger used in combination with Repeat storage makes an automatic even measurement device
| Option 17 : Noise Generator |
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Produces white or pink noise excitation signals
Noise output signal adjustable
Noise signal synchronised with start and end of measurement sequence
