A world of solutions – ideal for Industrial, Engineering, Vehicle, Environmental & Building Acoustics applications – Noise Frequency
The Model 33 Noise Frequency Real-Time Analyser with 1/1 & 1/3 Octave Band Filters simultaneously measures all parameters with all Frequency and Time Weightings, giving you the confidence you will always have the correct data for analysis. This high-performance meter offers exceptional acoustic performance but it is still easy to use; taking measurements is as simple as pressing the ‘record’ and ‘stop’ buttons.
The Real Time Analyser allows you to measure all Octave Bands at the same time, immediately capturing all of the data in each band and not missing any important information. This is very practical for reliable, accurate and rapid capture of variable noise levels to optimise environmental monitoring surveys or provide an accurate prescription of hearing protection in industrial environments.
For environmental noise monitoring under BS 4142:2014, the large memory, programmable auto repeat function and statistical LN values, combined with the optional addition of an outdoor kit, ensures the instrument is ideal for use as either a short-term or longer-term semi-permanent environmental monitor. The ability to take measurements every 125ms allows the user to conduct detailed analysis for engineering and environmental noise. It is also available with remote management so you can see the real-time noise Frequency measurements at your computer whilst taking measurements elsewhere.
The wide dynamic span of over 110dB in the single measurement range ensures you never make invalid measurements that ‘Overload’ or ‘Under range’ which is especially important during 1:1 or 1:3 Octave Band Analysis. An extensions module is available to enhance both the low and high frequency limits of the 1:3 Octave Band Filters so that frequencies as low as 6.5Hz up to 20kHz can be measured.
The two outstanding powerful software packages, Analyser and Acoustic Toolbox software allow you to download, analyse in depth and present your results in a variety of formats.
Applications / Features
Powerful measurement of Noise Frequency in real time
Compliant to the latest Noise Regulations IEC 61672-1 (Class 1), 61672-2 (Class 2) and BS 4141:2014
1:1 and 1:3 Octave Band Filters
High acoustic performance
Large memory for data storage
Measurements every 125ms allowing detailed analysis
Available as Class 1 (Model 33) and Class 2 (Model 33-2)
With exceptional acoustic performance and compliance to the latest worldwide guidelines the Model 33 is perfect for the following applications:
Environmental noise monitoring
Tonal analysis of Environmental noise using 1:3 Octave Band Analysis
Industrial noise measurements
Accurate prescription of hearing protection using Real Time Octave Band Analysis
Building acoustic measurements (using the optional frequency analyser reverberation time module)
Vehicle noise testing using remote measurement abilities
Ideal for engineering applications such as noise control & reduction using 3D tonal analysis and the reverberation measurements.
Longer term outdoor noise measurements with optional weatherproof kits
Noise measurements down to Real-Time NC curve calculations.
Class1 Model 33
Class 2 Model 33-2
EN 60651:1994,EN 60804:2000,EN 61260:1995, IEC 61672-1:2002 Class 1
ANSI S1.4:1983, ANSI S1.43:1997, ANSI S1.11:1986
EN 60651:1994 EN 60804:2000, EN 61260:1995,IEC 61672- 1:2002 Class 2
ANSI S1.4:1983, ANSI S1.43:1997, ANSI S1.11:1986
Class 1 MK:224 Class+ Electret Prepolarised Condenser
Class 2 MK:216 Class+ Electret Prepolarised Condenser
22dB(A) to 137dB(A), 23dB(C) to 137dB(C), 27dB(Z) to
137dB(Z), Peak to 140dB(C) or 168dB(C) as indication
Noise Floor (Typical)
17dB(A), 17dB(C), 22dB(Z)
dB(A), dB(C) and dB(Z) to IEC 60651 Type 1
F, S & I to Class 1 Tolerances
Backlit Graphical LCD
341mm x 82mm x 19mm
550g with batteries, 500g without batteries
2 x 1.5V size AA
Sound Level Meter Mode 15 Hours
1:1 Octave Band Mode 13 Hours
1:3 Octave Band Mode 11.5 Hours
Models 33 and 33-2 Broadband Mode – all functions are measured simultaneously
Sound Level LXY, Maximum Sound Level LXY max, minimum Sound Level LXY min
Equivalent Continuous Sound Pressure Level with Integration Time T LXT
Equivalent Continuous Sound Pressure Level of the entire measurement LXt
Sound Exposure Level LXE
Peak Sound Pressure Level LXpeak
Equivalent continuous sound pressure level with Impulse Time Weighting & Integration Time T LXIT
Equivalent continuous sound pressure level with Impulse Time Weighting of the entire measurement T LXIt
LXIT – LXT, LXIt – LXt, LXT –LAT, LCt – LAt
Measurement & Integration Time t & T
Percentiles L1, L5, L10, L50, L90, L95, L99 where X=dB(A), dB(C) & dB(Z) and Y=F,S & I
1:1 Octave Band Mode – all functions are measured simultaneously
Equivalent continuous sound pressure level with integration time T LT in each 1:1 Octave Band
Percentile Levels & Overall Percentile Level in each 1:1 Octave Band Ln (where n = 1, 5,10, 50, 90, 95, 99)
Peak Sound Pressure Level Lpeak in each 1:1 Octave Band
Overall Equivalent continuous sound pressure level with integration time T LXT where X=dB(A), dB(C) & dB(Z)
Real Time Assessment of NC Curves
1:3 Octave Band Mode All functions are measured Simultaneously
Equivalent continuous sound pressure level with integration time T LT in each 1:3 Octave Band
Operating Temperature -10°C to +50°C
Storage without Batteries Temperature -20°C to +60°C
Humidity 30 to 90% RH
Model 33 & 33-2 RS232 Output and USB, External Power, AC Output
Pulsar ‘Acoustic Toolbox’ Download & Analysis software supplied as standard with all instruments
Sound Level Meter Measurement Kit
Model 33 Model 33K
Model 33-2 Model 33-2K
Measurement kits include the Sound Level Meter, Model 105 or Model 106 Acoustic Calibrator, WS91 Windshield, K2 Attache Case, CP2 Carrying Pouch, Wrist Strap, Software, Download Cable, Batteries, Operating Manuals and Certificates of Calibration.
EFM33 Extended Frequency Module
RT33 Reverberation Time Module
WK1 Short Term Outdoor Kit
WK2 Long Term Outdoor Kit
Software / Accessories
Models 33 & 33-2 Software
The Model 33 & 33-2 instruments are supplied with the powerful Acoustic Toolbox software that allows stored measurements to be downloaded to a PC for detailed analysis. You can then create custom designed templates to present results in Excel or Word.
The ‘Acoustic Toolbox’ Frequency Analysis Software facilitates the Graphical ‘Live Display’ of up to three parameters if the Model 33 is connected to your PC. Post-processing allows detailed 3-Dimensional Frequency Analysis Modelling to be performed using downloaded measurement data.
The outstanding ‘Analyser’ Frequency Analysis Software, also supplied as standard, allows stored measurements to be downloaded to a PC for reporting and further analysis.
The instruments can store data in the internal memory and allow this information to be downloaded and reports subsequently created using the exceptional Pulsar ‘Analyser’ download & analysis reporting software.
The software also has a special database of hearing protectors that allows the user, at the click of a button, to have all calculations done automatically so that you do not have to manually measure the noise level. A selection of hearing protectors is listed and a report can be compiled.
Models 33 & Model 33-2 Accessories
The Model 33 or Model 33-2 Real-Time analyser & sound level meter comes supplied with the following Sound Measurement Equipment:
‘Analyser’ and ‘Acoustic Toolbox’ download, analysis and reporting software
USB download cable
Certificate of calibration
The instrument is most often supplied as part of a complete sound measurement equipment kit, containing all that is required to carry out a noise survey.
Each Model 33K (Class 1) or Model 33-2K (Class 2) noise measurement kit contains:
Model 33 or Model 33-2 real time analyser & sound level meter
Model 105 (Class 1) or Model 106 (Class 2) Acoustic Calibrator
K2 Hard Attaché Case
Calibration Certificate for the real time analyser and its acoustic calibrator
‘Analyser’ and ‘Acoustic Tool Box’ download, analysis and reporting software
USB Download cable
24 month warranty
EFM33 Extended Frequency Module for the Model 33
RT33 Reverberation Time Module for the Model 33
WK1 Outdoor Weatherproof kit with Lightweight Outdoor Microphone System
WK2 Outdoor Weatherproof kit with Heavy Duty Outdoor Microphone System
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