Larson Davis Data Navigation And Analysis Software (DNA)

Analyzing noise and vibration data can be difficult. Its not often easy to see the patterns or recognize the nuances of complex data sets. Furthermore, presenting data in a way that is meaningful can be challenging, yet perhaps our most important task.  DNA (Data, Navigation, and Analysis) makes manoeuvring through extensive data a simple operation and putting together meaningful reports has never been easier.  If you'd like any further information then don't hesitate in giving us a call or dropping an e-mail



Acoustic Intensity superimposed on a drawing:

Automotive - Order Tracking with a spectrograph:

Some of DNAs many features include:

  • Windows 95/XP Setup and Control of Larson Davis Models 720, 812, 820, 824, 2900B & 3000+

  • Multiple Live Data Displays on one screen



DNA  Software DEMO (.zip 1,532kB)

DNA User Manual (.pdf 2,640kB)

DNA Brochure (.pdf 5,830kB)

  • Stream data directly from screen to hard drive, including sound files
  • Read stored data files directly from analyser or disc
  • Create report templates for easy graphing and printing
  • Organise templates, graphics and measurements for easy recall
  • Reports can integrate text, graphics, pictures or embedded objects (OLE 2.0) such as MS Word, MS Excel and .WAV files
  • Graph 1/1, 1/3, 1/12, 1/24 octave, FFT and zoom FFT, SLM parameters; statistical distribution  and more!
  • Cursor Synchronisation between different types of graphics with drag and drop functionality for use in a wide variety of applications

Research and Development

  • Building Acoustics

  • Sound Power Determination

  • Vibration Measurements

  • Statistics

  • Pass-By

  • Sound Intensity

  • Simple Point and Shoot

  • Transient Capture


  • Aircraft Noise

  • Industrial Noise

  • General Surveys

  • Transport Noise

  • Community Noise

  • Events and Tone

Worker Safety

  • Work Place Surveys

  • Machinery Noise



One Software Package for Unlimited Needs
DNA was developed to integrate and fully support all types of measurements made with Larson Davis noise and vibration instrumentation. It replaces the need for several different software applications to achieve what you really want for display, analysis, and reporting of all project measurement data. DNA quickly produces high quality charts, reports, and presentations.

Real-time Display Mode
DNA displays and controls measurement data on a PC in real-time, while maintaining access to all of the instruments measurement and analysis functions.

DNA is What You See Is What You Get software. You place, resize, and manipulate graphical objects, images, graphs, text, and other types of objects on a page. What you see displayed on the screen remains unchanged on the printed report.

Instruments Supported
DNA software interfaces with the Larson Davis Models 812, 820, 824, 2900B, & 3200+ via RS-232 and RS-422. It provides instrument setup and direct conversion and display of data files.




Building Acoustics RT-60's:

        Measurement Organization
DNA saves all measurement-related files as elements of a project file. Project files can contain measurement data, page descriptions, images, audio files, etc. All data are organized in a tree structure (like Windows Explorer). In addition, DNA allows you to drag & drop any object onto project reports.

It is possible to perform any kind of graphic presentation with dimensions, scaling, dotted lines, bar graphs, overlaying, linear and log scales, EU, cursor synchronized among the graphics displayed, etc. Any combination of graphs and objects (even an entire document) can be saved as a template. In addition, you can perform cumulative distribution versus time and for each frequency band, percentile Ln versus time and frequency; frequency versus time, speed, distance or rpm; order analysis, RT-60, etc.

Data Post-Processing
DNA calculates functions including all mathematical operations from data blocks, spectra, multi-spectra, levels versus time, engine revolution or speed, and more. Levels of selected spectral bands can be modified or cancelled, both in frequency and in time domain, for data matrix or multi-spectra. Several weighting curves are included with the software.



Optional Modules

DNA can be expanded to meet your measurement needs with the following modules:

PC Direct Data Store

  • Stores Data Directly to the PC Hard Drive

  • Intended for applications where the instrument memory is not sufficient, e.g. environmental monitoring, pass-bys and long run-up

File Audio

  • Stores time domain signal from the instrument to the PC sound card and then to the Hard Drive

  • Sound file can be attached to a graph or page

  • Creates .WAV files

Order Tracking Analysis

  • Order extraction from autostore by-Tach

  • Graphics template for order analysis

  • Spectrum vs RPM or Speed for frequency or order

Building Acoustics

  • RT-60 with backward Schroeder Integration

  • ISO R140 & ISO 717

  • ASTM E90-E336 & ASTM E007

Acoustic Intensity

  • Support for ISO 9614

  • Contour Plotting (planar only)

  • Overlay on DXF Autocad file of the measurements surface


  • WYSIWYG display.  The working page is the same as the print out.

  • Support for; 720, 812, 820, 824, 2900B & 3000+

Data Input

  • Import data via Floppy Disc, RS-232, RS-422 and Modem

  • Real-time control of all measurement and analysis functions of the instrument

  • Automatic identification of noise events

  • Easy management of the various instrument setup parameters

  • Data files of waveforms, statistics, frequency analysis in 1/1, 1/3, 1/12, 1/24 octave and FFT with any kind of spectral resolution, crosspectra, module, phase, real and imaginary part, spectrum, multispectra, harmonic orders, meteorological signals, voltage, current etc

  • Measurement file with icons (Measurement Organiser) with drag and drop functions for quick selection


  • Management of graphics, numerical tables, comments, dynamic markers, digital photos and video clips

  • Direct import of image files as metafile WMF and EMF or bitmap as DIB or BMP

  • X, Y and Z axis definable as linear or logarithmic with selectable values or using auto scale

  • Single or multiple cursors synchronised among the displayed graphs

  • Alignment of graphics and objects

Post Processing

  • Cut & Paste between sequences acquired in the time domain

  • Measurement recalibration and level modification in frequency and time domain

  • Spectrograms and 3D graphics (Waterfall)

  • Mathematical functions, masks in time and frequency domain, automatic identification of the events, tonal components etc

  • Creation of the curve family as ISO NR, ISO 2633, Isophonics ISO 226 etc

  • Weighting Curves

  • Statistics on the overall value and per frequency band, also in FFT


  • OLE 2.0 (client) with all Microsoft applications

  • Copy and Paste through clipboard both for graphics and numerical tables

  • Undo

  • Email documents

  • On-line help

  • Print preview with multiple pages of a document


  • Pass-by Data Calculation

  • Direct data acquisition to a PC .WAV files of an event

  • DNA software and functions apply only to Larson Davis products which support them


Head Office: PC Environmental Ltd, Units 1&2 Claylands Road. Ind.Est., Claylands Road, Bishops Waltham, Southampton SO32 1BH UK

Tel: +44 (0)1489 891853                                                  Fax: +44 (0)1489 895488                                          E-mail: