noiseLAB 4 Power User Course: April 7, 2017

This half-day course will quickly move you from being a beginner to a power user that works efficiently and confidently with noiseLAB.  We show how you can go from calibration to report ready results in less than three minutes.

And if you are an experienced user of noiseLAB, you may be surprised that you may learn many new tips and tricks to make you even more skilled.

  • Shortcuts to speed up your work.
  • Graph use:
    • Advanced  auto scaling,  how to prevent “jumpy” graphs
    • Manual axis setting
    • Cursor grabbing, setting and finding.
    • Graph Size and background color
    • Peak or Valley search
  • High speed editing
    • Choosing channels to clip or exclude
    • Full Screen editing
    • User-defined channels to clip
    • Automatic naming with user-defined templates.
    • Renaming of Recordings and Clips
    • Changing of Time Stamps.
    • Adjusting the duration of clips
    • Clip padding before start and end.
    • Understanding mother-child relationships for Recordings and Clips
  • Calibration
    • “Live” calibration using acoustic calibrator
    • Calibration by “stealing” a known calibration tone value.
    • Calibration by manual entry.
    • Verifying quality of acoustic calibrator
      • Frequency and Amplitude stability
      • Distortion
  • Understanding the “Preview” Graph
    • Functions shown
    • Overload indication
    • Relationship to Clips and Recordings
  • Analysis types
    • Weighting network used
    • Parallel analysis results
    • Performance considerations: How noiseLAB shows you the processing metrics
  • FFT Spectrum
    • What is the allowable block size?
    • Zoom vs. 0.1 Hz maximum resolution
    • Export of FFT to Excel
    • Window choice
  • Octave Analysis
    • 1/1 to 1/24 octave
    • Settling time of filters:
      • How is this indicated
      • What considerations must I take for short Clips.
  • Sound Level
    • Parallel measurements
    • Why noiseLAB often is more accurate that your sound level meters.
  • Wave file import and export
    • Sampling frequencies
    • How to calibrate
    • Maintaining calibration for Exported .wav files.
  • Batch Processor
    • Differences to noiseLAB Capture
    • Time and Frequency Slice analysis
    • Graph exports with documentation: Easy to put in report.
  • Overview of Advanced Topics
    • Tone Analysis
    • Impulse Analysis
    • Sound Quality
    • Vibration Measurements

Course Date: Friday April 7, Aarhus, Denmark. 10.00-14.30

Price per person:  2500 DKK

Course Language: English or Danish depending on course participants

Registration: Send e-mail to Carsten Thomsen or contact at +45 40 82 77 72.

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New Sound Propagation Software Released.

SPL 2000 is an updated version of exSOUND2000 featuring

  • Greatly improved user interface
  • Updated Sound Source models.

The program is sold as an experimental research tool, and requires that the user has a thorough understanding of the Nord2000 model.

Software delivery is typically two working days directly from FORCE Technology.

Educational users:  Please contact FORCE directly at .

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noiseLAB for Multi-channel Use

noiseLAB supports up to 8 simultaneous parallel acoustic channels.

The following is a guide to configuring this most economically:

2-4 channels:

  • For a noise floor of about 30 dB(A) use one National Instruments USB 9234 with four active microphone channels.
  • For a noise floor of about 17 dB(A) use a microphone preamp with 20 dB gain and two active channels.  This gain setting requires additional power from the USB 9234, therefore only two channels can be used and each channel must be coupled in parallel to an  unused inputs to get sufficient powering.

4-8 channels (partial synchronization)

  • User two National Instruments 9234.
  • With a noise floor or 30 dB(A) you can use up to 8 channels.
  • With a noise floor of 17 dB(A) you can use to up 4 channels as described above.
  • The two channels in each 9234 are synchronized, but the two 9234 devices are not synchronized between each other.  Hence precise time relationships cannot be determined, since the internal clocks in the 9234s may drift several seconds per day.

4-8 channels (full synchronization)

  • Solution 1: Use two National Instruments 9234 in a CompactDAQ Chassis cDAQ 9174 which synchronizes the two modules.  The powering constraints described above are the same.
  • Solution 2: Use the National Instruments PCI 4474 (four channels) or PCI 4472 (8 channels)  in a PC with a full size PCI slot.  (Note: PCIe slots cannot be used).   These cards provide 4 or 8 fully synchronized channels, and 8 dB greater dynamic range than the NI 9234.  In addition, each channel provides sufficient powering to drive preamps with 20 dB gain.  Finally, twice as high sampling frequencies as the 9234 are supported.


  • Two USB digitizers connected to  noiseLAB must be identical and configured with the same sampling frequency.
  • The 9233 is NOT recommended since it cannot turn off its IEPE powering, and also has  “end of life” status at National Instruments.


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Beta Software posted

January 26, 2016: A beta version of noiseLAB Batch Processor has been posted with new features and bug fixes.

Also posted is a patch to noiseLAB Capture which makes it possible to read project files which have been moved.

You can download the files here.

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noiseLAB Express upgraded

noiseLAB Express is getting upgraded to noiseLAB Standard Edition.

As of January 4, 2016, noiseLAB Express will be replaced by the noiseLAB Standard Edition

  • The price is unchanged.
  • Two channel capability
  • Increased recording time to 1 hour maximum.
  • Has project file compatibility with noiseLAB Advanced and noiseLAB Professional.
  • Existing licensed users of noiseLAB Express can receive a license key to noiseLAB Standard Edition
  • Existing users should keep their current noiseLAB Express installation since its project file format is not compatible with noiseLAB Standard through Professional Editions.
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noiseLAB Advanced User Course

noiseLAB: Advanced Users Course

noiseLAB 4.0 has more than meets the eye. Under its deceptively simple user interfaces you will find surprising power.

  • Understanding the noiseLAB Architecture–and its benefits
    • Architecture
    • Work flow
    • Data formats
  • Work Faster
    • Faster Import, Calibration, Editing and analysis.
    • Short cuts, tips and tricks.
    • Parallel processing. Getting the most from your PC.
  • Achieve higher quality
    • Scrubbing, listening, and auditing.
    • Editing: Advantages and pitfalls.
    • Documentation: Completeness and consistency.
    • Achieving confidence/re-working of results.
    • Calibration
  • Choosing and using the right hardware:
    • Hard Disk (Flash Recorders), Sound Level Meters, or PCs with digitzer front end.
      • Advantages/disadvantages
      • Traceability/Risk
      • Documenting your work in the field.
      • Calibration: also with variable gain.
    • Microphones and Calibrators.
    • Difference between manufacturers “accuracy”. Things to watch out for.
    • Documentation and best practices.
    • Wireless front ends.
    • Standards conformance of PC Based systems: IEC requirements.
    • Tips for optimizing dynamic range, accuracy and preventing overload/underrange.
  • Auditing and editing your signals.
    • Validating your calibration
    • Tracking gain changes
    • Pre-filtering of Recordings
  • Analysis Functions in depth
    • 1/N octave: Settling times, filter shapes, center frequencies, time slices.
    • Sound Level Functions: Fast, Slow, Peak, Impulse, statistics.
    • FFT: Line spacing, FFT Blocks sizes, weighting functions, time slices and overlap.
    • Time and frequency slices.
    • Tone Analysis: IEC and Danish methods
    • Nordic Impulse Method
    • Sound Quality metrics
    • Vibration Analysis
      • Calibration
      • Analysis types and units.
  • Resulsts and report generation
    • Division of tasks between noiseLAB and Microsoft Office.
    • Data export to Excel and Word of Results Tables and Graphs.
    • Export of Time Slice Graphs.
  • Data import of raw signals, FFT Spectra and noiseLAB 3 projects.
  • Data management, storage, and backup: best practices.
  • The secrets of the TDMS file format and how you can use it.
  • Optimizing performance.
  • Platform issues, IT department cooperation
  • Tips and tricks: Bring your own three best tips and tricks or applications.
  • Common mistakes! Bring your own experiences and share!
  • Product Support, upgrade and licensing policies.
  • Product round table: Questions, suggestions for new functions.

Invitation noiseLAB Advanced Users Course

Course Language: Danish or English depending on participants.

Discounts: Paid participants will receive a 1000 DKK discount on as follows:

  • upgrades between editions (for example from Standard to Professional)
  • upgrades to a new major version. (from 4.0 to Version 5).
  • New purchase of noiseLAB.
  • Second (and third etc.) user License (which has a list price of 50% of the first license) will also be discounted by 1000 DKK.  Discounts only valid for purchases made in the same calendar year.


Carsten Thomsen +45 40 82 77 72

noiseLAB: Work Fast, Work smart.

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noiseLAB 4.0: Even simpler, even more powerful

noiselab 4.0 provides professional noise measurement software to Type 1 standards that is


  • Easy to Learn
  • Easy to Use

A first time user can learn the basics in a few minutes by following the tips in this two-minute YouTube video.

The design of noiseLAB is user-driven, with dozens of features requested by advanced, professional users to give a faster, simpler workflow.

But this simplicity is also extremely


  • 1/N octave, FFT Analysis, Sound and Vibration level with statistics.
  • Automatic Tone Analysis
  • Sound Quality Metrics
  • Automatic Impulse analysis
  • Vibration Analysis
  • Time Slice analysis

Perhaps most important of all, is the “secret” workflow that gives you

Better Results

noiseLAB gives you more accurate, better documented results because

  1. You can audit your recordings by
    • Listening
    • “Scrubbing” the files (viewing spectra while dragging the cursor through the waveform)
    • Editing the files to select the relevant part of the signal and exclude unwanted signals such as barking dogs or chirping birds.
  2. You can always go back to the original recordings to
    • Make another analysis on the same data
    • Verify the correctness of your data selection
    • Correct mistakes

This workflow of Record, Edit, Analyze gives better results with better documentation and gives you a stronger case should your measurements be challenged.

Fast Reporting

Results of all analysis types can be saved in Excel friendly form and also as fully annotated graphs in jpg format.

For example, with Slice analysis, you can Slice a signal into equal duration blocks, each one second long (user-defined duration).  With a single button you can generate annotated jpg graphs of all the slices, as seen in this Windows Explorer screenshot.


Note that the file names contain the Slice number and actual start/end times, making it easy to find the relevant files without opening them.

And each jpg screen shot in automatically annotated with the most important documentation, thus reducing errors such as pasting a wrong graph into Word, or using a wrong Figure title:

frank Slice#42 41.000 to 42.000 s REC_Car Washing Machine

All of this, with a single mouse click.

As your experience with noiseLAB grows you will find even more features that make the product fast, fun, and powerful to work with.

More details about noiseLAB

noiselab 4.0 data sheet

Click here for more information and downloads

Existing Customers: Upgrading to noiseLAB 4.0

Editing to improve the quality of your measurements

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noiseLAB 4.0 Now Shipping

noiseLAB 4.0 is now shipping.

Featuring a complete re-design, with focus on simpler workflow, faster and more accurate calibration, and a new, high-performance editor.


In addition, new functions include vibration measurements, sound quality metrics, and the Nordic Impulse detection method.

noiseLAB 4.0 consists of two programs:

  • noiseLAB Capture, for recording or import of .wav files, editing, and basic noise analysis functions: Sound Level, Ln, 1/N Octave and FFT Spectrum Analysis.
  • noiseLAB Batch for advanced analysis, including tone and impulse analysis, sound quality metrics, and vibration analysis and time slice analysis.

noiseLAB 4.0 is available in three editions:

  • Standard
  • Advanced
  • Professional

noiseLAB 4.0 Data Sheet

If you already own one of these editions for noiseLAB 3.0, your existing license gives you a free upgrade to noiseLAB 4.0.

To download the free demo, which also can be unlocked by valid license keys, click here:

noiseLAB download.

To purchase noiseLAB contact DELTA or one of our distributors.

Pricing of noiseLAB 4.0 remains the same a previous versions.

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noiseLAB and noiseLAB Wind at noiseCON Sept 7-10 in Fort Lauderdale

noiseLAB 4.0 (noiseLAB Pro) along with noiseLAB Wind will be featured at the Scantek stand at Noise-Con 2014. in Fort Lauderdale, Florida.

At the same time, noiseLAB 4.0 will be shipping (as a download on September 8) as a free upgrade for existing customers.  Attendees at Noise-Con are invited to a special individual demo of both noiseLAB and noiseLAB Wind at the show.

To book a time, contact the personnel at the Scantek stand, or email  Carsten Thomsen at cth at

A 10% show discount is available for all participants in the individual demo.

We invite you to see how DELTA’s many years of acoustics and noise experience is leveraged in these two new products, including our in-depth experience in wind turbine noise measurements and standardization.

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The flexibility of noiseLAB Pro 4.0

noiseLAB 4.0 Data Flow

noiseLAB 4.0 consists of two programs

  • “noiseLAB Capture” for data acquisition, recording, and Editing
  • “noiseLAB Batch” for analysis of large batches of Recordings or edited Clips.

noiseLAB uses open data formats and can interface to a wide range of data types.


noiseLAB Capture accepts waveforms from:

  • National Instruments DSA Digitizers with IEPE transducer powering. This gives you plug-and-play configuration and a fully documented signal path.
  • Internal and external sound cards
  • .wav files from hard disk recorders, sound level meters, and other sources.
  • TDMS waveform files recorded by noiseLAB itself, or noiseLAB Wind. This gives you flexibility in analyzing files from other noiseLAB projects or noiseLAB Wind Recordings.

noiseLAB Capture can export waveforms in:

  • TMDS waveform format, with complete metadata annotation.  These files can be read by LabVIEW, Excel Plugins and others packages.  The format is fully documented by National Instruments.
  • .wav files.  Recordings or Clips from noiseLAB Capture can be output in scaled format to optimize dynamic range of the resulting files. The relative level of the individual files is retained.

noiseLAB Batch provides for advanced analysis (FFT, Octave, Tone or Impulse Analysis, Sound Quality, Vibration etc.) of multiple Recordings or Clips. Input data sources include:

  • Recordings from noiseLAB Capture
  • Recordings from noiseLAB 3.0
  • FFT Spectra for subsequent IEC 1996 Tone Analysis from
    • Delimited FFT files in a variety of formats
    • from noiseLAB 3.0
    • from noiseLAB Batch 4.0
    • noiseLAB Wind

noiseLAB Batch can output results as:

  • Tables of Results for each analysis type in delimited format easily parsed by Excel or other applictions.
  • jpg graphs of the result(s). For Time Slice analysis, graphs of multiple slices are automatically output in one operation.

This flexibility means noiseLAB makes it possible for you to interface to virtually any source of signals and output data in a range of popular and open formats.

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