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Nor150 Sound level meter

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Sound level meter

Nor150

Class 1 Sound level meter

The Nor150 is a high‑precision Class 1, dual-channel sound and vibration analyser, designed for demanding tasks in environmental noise monitoring, building acoustics, sound intensity, workplace noise and vibration assessments.

It combines laboratory-grade performance with practical field usability:

a 4.3" colour touchscreen,
a wide frequency range from 0.4 Hz to 40 kHz in 1/3-octave bands,
a 120 dB measurement range, and
seamless connectivity to Norsonic application programs or NorCloud

The Nor150 is the dual channel cousin to the Nor145. It shares the same user philosophy and features. With regular software upgrades and a 3‑year warranty, the Nor150 provides a long-term platform for 2‑channel sound level, vibration, and sound intensity measurements that can be configured to match your specific applications.

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Sound Intensity with Nor150

We call it "a bit smarter" Sound Intensity.

Norsonic Sound Intensity offers clear advantages over other commercial sound intensity systems:

Wide dynamic range using a single 12 mm spacer
Reliable measurements even in highly reverberant sound fields
Quick, in-situ calibration with the lightweight Norsonic coupler (Nor1294)
Built-in guidance for ISO 9614-2, including on-screen warnings and suggestions based on your actual measurements
Projects remain fully editable on the instrument or in the Nor850 reporting software
Pause/continue and back/erase functions to handle obstacles or unexpected noise during a measurement
One-hand, cordless remote control from your smartphone
All key information easily accessible directly on the instrument

Building acoustics with on board rating
Environmental noise monitoring
Environmental noise assessment

Sound Power
Sound Intensity
Room acoustics - STIPA

Product noise testing
Noise at Work
Noise nuisance recorder

Nor150Sound level meter display, only showing global values.

Nor150 view Level vs time Landscape. Only available as landscape (wide) in single frame mode.

Nor150 view: Dual view with L/t and L/f.

Nor150 view Ln: Combined cumulative and statistical percentage display. Only available as single frame display.

Nor150 view Ln Landscape: Combined cumulative and statistical percentage display. The graphical display is turned 90 degrees.

FFT Landscape: Displays the FFT spectra as landscape.

Split view with FFT and 1/3 octave. The link cursor feature connects the cursor in FFT and 1/3 octave displays, making it easy to manoeuvre in the frequency domain.

Numerical tables: Each graphical display has a numerical table as an alternative.

Environmental noise measurement with Nor150

Nor150 is ideal for all types of environmental noise measurements. Measurements with markers, audio recordings and event triggered pictures are easily made. The large 4.3” display gives you all the necessary information. Up to 60 measurement parameters may be logged simultaneously.

The sophisticated trigger system enables different trigger levels for Day, Evening or Night with event triggers to collect markers, audio recordings and pictures. The data can be displayed remotely on any PC, notepad or smartphone. From the same device, you may change settings or simply check the status of the Nor150.

Twin time profiles with resolution from 5ms and additional moving report with trigger possibility.
Extensive trigger system for reports, audio recording, camera and digital output lines.
Voice, text and picture notes
5 independent event triggers (LDEN support)
Advanced marker management
Full remote control from smartphone, PC or pads
0-20 sec graphical back erase / pause function.
0-120 sec Audio pre-trigger.
Easy integration to postprocessing programs and Excel.

Nor150 offer four different views. You can customize each view as you like and rotate between the views using the VIEW button. General analyser (environmental) mode has a selection of different display views. Portrait and Landscape. All Portrait views can either be a single or dual type frame.

Sound intensity measurements with Nor150

The Nor150 fitted with sound intensity option and the sound intensity probe kit Nor1290 is a powerful tool for all type of sound intensity measurements. It is designed for easy use in all type of measurement conditions.

Control the Nor150 remotely with a lightweight, easy-to-use smartphone handle. Your smartphone serves as both the control unit and display, so you can perform all measurements comfortably with one hand. The smartphone connects via WiFi to the internal web server in the Nor150, and the system also supports operation with the sound intensity probe connected directly to the Nor150.

Applications

Sound Power measurements in accordance with ISO 9614, ANSI S12.12, ECMA 160, noise mapping and noise source locations.

Features

Compliant to IEC 61043 Class 1.
Full on-board support for ISO 9614-1 and 2 sound power measurements.
Unique phase correction allows measuring 25 Hz to 10 kHz with 12 mm spacer.
Intuitive warning indicators.
Measurement-based suggestions for improving results.
Automatic measurement sequence.
Pause and back-erase with graphical display.
Full measurement edit support (segment exclusion, resize, retake).
Add segment support.
Export to Nor850 mapping and reporting software.
Photo, text and voice annotation.
Smartphone (NorVirtual App) remote control for single-hand operation, all measurement data presented during measurement.
Support for ½” and ¼” microphones.

Upper frame shows receiving room level with background noise. Running L/t in lower frame to evaluate if unwanted noise appears in the measurement.

Building acoustics rating view 1: Calculated sound insulation together with the single number index.

Building acoustics rating view 2: Numerical table to present the single number index along with the spectrum adaption terms.

Building acoustics rating view 3: All numerical results of the analysis plus a level overview graph.

Building acoustics rating view 4: Background noise vs. receiving room levels

Building acoustics rating view 5: The # softkey toggles through specific source positions.

Building acoustics rating view 6: R’w rating.

Two sample pictures out of several views offered for RT measurements.

Building acoustics: Manual adaption of RT time is possible

Building Acoustic measurement with Nor150

The Nor150 can be configured either as a manually operated single- or dual-channel building acoustics analyser, or as a remotely controlled, high‑performance frontend for the Nor850 multichannel measurement system.

The instrument includes a built‑in signal generator for accurate excitation during source room level measurements and reverberation time measurements. All measurements are performed in accordance with ISO 16283 requirements for field measurement of sound insulation in buildings.

With additional background noise measurements, the Nor150 automatically calculates airborne sound insulation indices DnT and Rw in compliance with ISO 717. Using a tapping machine such as the Nor277, it also supports determination of the impact sound insulation index Ln,w.

For reverberation time, the Nor150 supports both continuous and impulsive excitation. It calculates T15, T20, and T30 values in parallel, providing complete reverberation time data for building and room acoustics assessments.

The Nor150 integrates seamlessly with Nor850 software. It can operate as a remote frontend within the Nor850 Measurement System or as a standalone manual measurement tool, with results easily exported to the Nor850 Reporting System for structured analysis and reporting.

Building acoustics mode offers application tailored displays to secure a good work flow and control in your project.

STI calculation based on the STIPA method

The STI mode supports the latest revision of the STIPA standard, IEC 60268-16 revision 5.
Additional features are background noise correction and auditory correction.
Background noise correction can be turned on/off.
Auditory correction gives a lower score on the STI value if the STIPA noise signal is too loud or too low. It shall normally be turned on, but the latest revision of the standard recommends it to be possible to turn it off in some special circumstances.
The built-in signal generator generates the STIPA signal.
A complete measurement sequence takes only 21 seconds.

Features

Standards

Specifications

Options

Downloads

Accessories

Features

High Precision Class 1 sound level meter and frequency analyser.
Single or dual channel.
Large colour touch-screen (4.3”).
On board Building Acoustic rating and evaluation.
Built in webserver for communication through the internet from anywhere in the world via LAN, USB, WLAN, 3G/4G modem.
Seamless integration with NorCloud and Nor850.
Voice and text notes, built in GPS and camera help you document your measurements.
Wide frequency range for vibration and low frequency measurements (0,4 Hz – 20 kHz in 1/3 octave band).
Parallel 1/3 octaves and FFT analysis.
120 dB measurement range.
dB and engineering units (m/s² and m/s).
Extensive trigger system for reports, audio recording and camera.

Standards

ISO 354
ISO 717-1, ISO 717-2
ISO 1996-1, ISO 1996-2
ISO 3382-2, ISO 3382-3
ISO 9614-1, ISO 9614-2, ISO 9614-3
ISO 10052
ISO 10140-2, ISO 10140-3, ISO 10140-4
ISO 16283-1, ISO 16283-2, ISO 16283-3
IEC 60268, IEC 61012
IEC 61043
IEC 61260-1, IEC 61260-2, IEC 61260-3
IEC 61672-1, IEC 61672-2, IEC 61672-3
EN 61010-1
ASTM E1007-21, ASTM C423-23e1, ASTM E336-23, ASTM E413-22, ASTM E90-9
ANSI S1.4, ANSI S1.11, ANSI S1.43
DIN 45657, DIN 4109-4, TA-Lärm
NS 4814, NS 4815, NS 8172
BS EN ISO 16283-1, BS EN ISO 16283-2, BS EN ISO 16283-3
SS 25267
SIA 181
ECMA 160:1992

Specifications The Nor150 sound and vibration analyser is supplied with ½” preamplifier Nor1209 and the ½” measurement microphone Nor1225.

It conforms to the latest revision of the following National and International standard including amendments, all type 1 / class 1; IEC 61672, IEC 60651, IEC 60804, IEC 61260, DIN 45657, ANSI S1.4, ANSI S1.11, and ANSI S1.43.

Measured parameters

Simultaneous measurement of SPL, Leq, LeqI, LMax, LMin, LE, LEI, LPeak, Ln and Tmax5.

Time weighting functions: Fast, Slow and Impulse (Simultaneous).

Spectral weighting functions: A, C and Z – weighting (Simultaneous).

Frequency analysis: 1/1 and 1/3 octave real time filters from 0,4 Hz to 20 kHz.

Statistical calculations: 8 individual adjustable percentiles from L0,1% to L99,9%, The statistical calculations are performed in real time within each frequency band and for each profile period if period length is set longer than 2 minutes. User can select between Fast or Slow time weighting as basis for the statistical calculation.

Measurement control

Overall measurement duration: 1 sec – 7 days. (If set to Repeat or Synchro mode a new measurement will be started automatically, with no time gap between each measurement.).

Time profile A resolution: 5 ms – 24 hours including full frequency spectra. From 1 sec if profile B or Moving is enabled.

Time profile B and Moving resolution: 1s – 24 hours. A, C and Z – no frequency spectra.

Back erase in Pause mode: 0-20 sec free selectable graphical back erase.

Audio recording

12 and 48 kHz sampling rate / 8 , 16 and 24 bits / 0-120 sec pre-trigger.

Measurement range

One range covering 120dB without any range adjustments.
Self noise measured with 1/2” microphone with a nominal sensitivity of 50mv/Pa: 17 dBA.

Maximum RMS level 137 dBA, Maximum Peak level 140 dB PeakC.
The high SPL mode enables measurements up to 194 dB using a suitable 1/4” microphone.

Noise generator

Built in noise generator with Sine, White, Pink and 1/1 and 1/3 octave band passed filtered noise and Impulse noise.

Sound Intensity

Full on-board support for ISO 9614-2 with intuitive warning indicators and measurement based suggestions for improvements. Fulfils IEC 61043 class 1 requirements.

Dynamic capability Nor150 combined with Nor1290 Sound Intensity probe with 12mm spacer; >18 dB (125 Hz -10 kHz), >13 dB (f ≥40 Hz)

Reverberation time

Parallel calculation of T15, T20 and T30 in addition to Tmax for Noise excitation and EDT for impulse excitation.

FFT

Sampling rate: 48 kHz.

Frequency resolution: 1.46 Hz or 2.92 Hz (FFT size 8192 or 16384 lines).

Upper frequency: 22kHz

Functions: Auto spectrum, linear averaging.

Acquisition rate: ~700 ms – no overlap.

Display: Dynamic display zoom 1 – to 64 in power-of-two steps.

Time windowing: Hanning

Display

4,3” colour display, ¼ VGA with capacitive touch. Protected by an anti-smudge coated and scratch-proof glass.

GPS / Camera

Built in GPS.

Built in Camera for annotation before and after a measurement. Support for use of external IP or device cameras for event triggered pictures during a measurement. The event captured pictures are automatically timestamped, transferred to Nor150 and are bundled with the measurement.

Datastorage / Datatransfer

Storage modes: Manual, Auto, Repeat and Synchro. Synchro synchronise the start of the next measurement to the next full hour.

Internal memory: 350 MB – not used for measurement storage.

Micro SD card: Up to 64 GB, supports XC and HC standard.

Data can also be stored on an external USB stick.

Data transfer via LAN, USB and high-speed RS232. Supports WLAN and GPRS – 3G/UMTS – 4G/LTE via USB.

Inputs

Microphone input: Two microphone inputs (Second channel optional). Supports standard 7 pin lemo preamplifiers including SysCheck, Microphone heating, TEDS and IEPE. Polarization voltage: 0, 70 and 200V. Preamplifier voltage is ± 15V. Both channels are connected to the main microphone input in Sound Intensity mode. Channel 2 is multiplexed and replaces the SysCheck feature.

Comment microphone: Via 3 pin mini jack.

Analogue inputs

AC out, 100mV full scale on 15 pin I/O socket.

3 pin mini jack headphone socket for replay of voice notes, listen to microphone AC signal or replay of audio recordings. Comment microphone for voice notes is connected to same plug.

Signal generator on 15 pin I/O socket with Pink, White, Band-pass filtered, sine and impulse noise.

Power

Rechargeable 3,5Ah Li-Ion batteries with fuel gauge.

External power 10-28Vdc 3-5 Watt.

Typical battery lifetime: 8 hours.

Dimensions / Weight

Dimensions: 240 x 82 x 39mm (ex. preamplifier and microphone LxWxH)

Weight: 700 g (including preamplifier and microphone)

Options

Nor150 basic

Nor150 basic unit includes A, C and Z weighting networks with measurement of Leq, LeqI, LE – sound exposure level, SPL, Lmax, Lmin with parallel detection of Fast, Slow and Impulse time constants, statistical calculation of Ln, and TMAX5. The measurement data is analysed as global values in addition to two parallel time profiles with an adjustable resolution ranging from ms to 2h. All interfaces and voice and text annotation included.

Option packages:

Nor150 Advanced Level option kit
(e.g. for ENV) incl. options: 3, 4, 11, 12.

Nor150 Building Acoustic option kit
incl. options 3, 7, 8, 9.

Nor150 Consultant package option kit
incl. options 3, 4, 7, 8, 11, 12, 13.

Option 1: Built-in camera and GPS

The internal camera is designed for visual documentation before and after a measurement. Image files are automatically stored within the same project as the corresponding measurement data, ensuring complete and traceable documentation.

Event-triggered images require an external IP camera or a camera integrated in devices such as smartphones or tablets. Images captured during a measurement are logged as events in the L/t graph and can be reviewed directly on the Nor150 or later in NorReview.

The integrated GPS is used for precise position identification. In upcoming software versions, it will also support accurate time synchronization. This is particularly valuable when multiple Nor150 units are deployed to capture the same noise event, for example in blast monitoring applications. The GPS position is stored as part of the measurement file and can optionally be included in the file name for easier data management.

This option is not available as a retrofit and must be specified at the time of ordering the instrument.

Option 2: Second channel

Input channel two is located on the left side of the instrument, well protected from dust and moisture by a rubber cover.

The second channel is a standard 7 pin Lemo connector with the same specifications as the main channel. It supports both standard 7 pin lemo preamplifiers as well as IEPE preamplifiers and accelerometers. Included is also SysCheck signal for check of outdoor microphones like the Nor1216 and Nor1217.

This option is not available as retrofit and must be ordered along with the instrument.

Option 3: 1/1 and 1/3 octave band filters

1/1 and 1/3 octave filters (0,4 – 20 kHz in 1/3 octave band) including multi-specter functionality in time profile A.
A 3 order analogue high pass filter with a -3 dB point at 3 Hz may be selected to avoid overloading the input circuitry from low frequency noise.

Option 4: Audio recording and markers

This option extension adds audio recording and marker management to the Nor150. In Nor150 you can replay the recording on the meter itself without any need of transferring the data to a PC. The option 4 adds a sophisticated but easy to use marker management indispensable for every environmental noise assessment tasks. The user can select up to ten makers, add names, colour and associates the marker to an action. The marker can either be a single or a toggle marker. The action can be; enable a reference tone, start a recording, take a picture or set one of the digital outputs found on the 15pin socket. It is easy to add markers on an ongoing measurement. Voice and text notes may in the same way as markers be added to an ongoing measurement. The markers can be moved or deleted. Markers may also be added after a measurement is elapsed.

The Nor 150 also offers six system markers that are automatically inserted in the Level versus time profile. These are; Measurement Pause marker, Measurement continue marker, Audio recording marker, Picture marker, Signal overload marker, Battery low marker, Event trigger marker.

The Nor150 is seamless integrated to the PC program NorReview (Nor1026) to further evaluate and calculate the noise data and to create customized reports.

Features

Single or dual channel audio recording
12 or 48Khz audio recording sampling rate
8, 16 or 24 bit audio recording resolution
0 to 60dB digital audio recording gain
0 to 120 sec audio recording pre-trigger
Sophisticated marker management system

Option 5: Sound Intensity

Sound Intensity mode supporting measurements in accordance with ISO 9614-1 and -2. Includes web server for remote control and display of measurement results on a smart phone. Requires option 2 and 3.

Option 7: Signal generator

Signal generator with sine, white, pink, band passed filtered noise.

Option 8: Reverberation time decay and calculations

Reverberation Time decay and calculation of T20 and T30 based on impulse or noise excitation. Requires option 3. Requires also option 7 if RT shall be based on noise excitation.

Option 9: Complete building acoustic mode

Complete Building Acoustic mode with microphone position room averaging in accordance with ISO 16283 as well as sound insulation indices calculated in accordance with ISO 717/1 and /2.

Requires options 3, 7 and 8.

Option 12: NorCloud

With this option you are able to connect the instrument to Norsonic’s cloud service; NorCloud.

NorCloud is a Norsonic system to collect, display and process sound level data.

When used together with Nor150 sound analyser, you can measure, analyse and report directly from your web browser.
Create projects, assign sound level meters to projects and configure settings such as audio recording, SMS/e-mail alarms and automatic reporting.
Norsonic stores your data safely and conveniently, but you are of course free to download your measurements.

Option 13: FFT

FFT sampling rate is 48 kHz with more than 16000 lines.

Upper frequency is 22 kHz.

Dynamic zoom from 1 – 64.

The FFT calculation and 1/3 octave spectrum works in parallel.

Nor150-screenshot-11-Environmental-transparent(664x664px)

Option 14: Ultrasound

Ultrasound option including 1/3 octave filters to 40 KHz, 1/1 octave to 31.5 Hz and AU network.

Requires option 5.

Option 17: STI calculation based on the STIPA method

Environmental noise

Reliable noise monitoring with sound level meter, stand-alone terminals or large-scale systems.

Building acoustic

Building acoustic is about the sound that travels between rooms - something you'd rather avoid.

Room Acoustics

Room acoustics is about the sound quality in a room, for example in a concert hall.

Sound Intensity

Measure sound level and direction, even in challenging acoustic environments.

Sound Power

Sound Power is about how much sound energy a source emits per unit of time, measures in watts.

Noise at Work

Noise measurement at the workplace for easy mapping and documentation of noise levels

Software

NorCloud, Environmental noise monitoring

Noise sources

Nor282 Power amplifier

Software

Nor850 Reporting and calculation

Noise sources

Nor283 Dodecahedron loudspeaker

How accurate is the GPS positioning in the Nor150?

Under very good conditions: approximately 7 meters. It is based on the SiRFstarIV architecture.

How to synchronize clock with GPS for Nor150?

Setup
→ Instrument
→ Time & Date
→ select “Sync clock with GPS clock” – i.e. synchronize manually.

How to display the Nor150 screen image on a PC?

Connect the Nor150 to the PC. A Windows CE screen will appear. Select “Connect.” On the Nor150, go to Setup → Instrument → Communications → USB (Remote display).
Start the ASRDisp program. The image will be shown on the screen. You can zoom in up to 1:3.

Is the trigger function included in the basic version of the Nor150, or is it included in Option 4 “Audio recording + markers”?

Measurement trigger is included in the basic version.
One event trigger is included in Option 4.
Multi-event trigger is included in Option 11.

How do I install a new license code in Nor150?

To activate the license:

Copy the attached "License.txt" file to the root folder of a USB memory stick.
Start the Nor150 and plug in the memory stick.
Press Setup - Instrument - About - License - Enter license.

How is reverberation time measured using the impulse method?

When measuring reverberation time using impulse excitation in Nor150, it will measure for 12 seconds, then find the highest level within this period of time and calculate reverberation time from that point. That is done for each frequency individually. It means there is no specific trig level.

How do you retrieve the error log from the Nor150?

This must be done after the first restart following the error in order to retrieve the cause of the restart; otherwise, the log will be overwritten.

Connect the Nor150 to a PC using a LAN cable. Check the IP address of the Nor150 by going to Setup → Instrument → Communication.

Enter this address in Windows Explorer on the PC, in the address/search field, for example:
ftp:\192.168.12.31
(this is my address — please use your own IP address).

Then open the folder Internal/.

You will find two folders: Log and Setups.

Please copy these folders to your PC or a memory stick, compress them into a ZIP file, and send them to us.

Nor150

Class 1 Sound level meter

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Sound Intensity with Nor150

Applications for Nor150 Sound level meter

Environmental noise measurement with Nor150

Sound intensity measurements with Nor150

Building Acoustic measurement with Nor150

STI calculation based on the STIPA method

Nor150 basic

Option packages:

Applications

What are you going to measure?

Environmental noise

Building acoustic

Room Acoustics

Sound Intensity

Sound Power

Noise at Work

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