Software for Sound and Vibration Analysis
with Data Recorder and FFT Analyzer
SINUS Acoustic Multichannel Universal Realtime Analysis Instrument
  • SAMURAI software for noise and vibration analysis | SINUS
  • SAMURAI software for measuremet data analysis | SINUS
  • SAMURAI software for sound level meter touchscreen-displays | SINUS
  • SAMURAI software for noise and vibration analysis.

  • SAMURAI-base software, workspace-view for measuremet data analysis on large monitors.

  • SAMURAI-base software, tablet-view for small touchscreen displays like the NoisePAD-8 "touchscreen display.


SAMURAI is our universal software package for noise and vibration measurements as well as real-time analysis with our measurement systems.

SAMURAI contains 2-, 4- or 8-channel sound level meters conforming to the IEC60651 / IEC 60804 / IEC 61672-1, IEC 651 and IEC 804 standards. In Germany the Soundbook system is officially calibratable using the siNoise program version (fixed setup). Additionally, we have obtained the type approval according to IEC 61672-1 and IEC 61260 (for 1/3 octaves) in Austria and Hungary.

Because of the high system performance the user benefits from a wide range of functions simultaneously available on all measurement channels. SAMURAI features excellent display capabilities not only during the measurements but also during the post-processing of the measurement results. The basic principle of the software is that virtual measurement instruments provide data for activated measurement channels. There are various types of virtual measurement instruments, differing in the types of data provided (e.g. sound levels, spectra, time signals, speed, RPM, transfer values, video, slow channels...). These virtual measurement instruments can be freely allocated to the activated measurement channels. Simultaneously with the measurement and analysis, the data provided is stored in synchronous data streams.

SAMURAI features a powerful Windows user interface enabling intuitive touch screen operation. The storage of user-defined setups supports the user in the performance of recurring measurement tasks. The setup of a measurement previously performed can be used or modified for a new measurement task. The “Easy Operator Mode” simplifies recurring measurement tasks, allowing individual setups to be created and used whose operator interface is reduced to a minimum (e.g. Start/Pause/Stop). This enables even inexperienced users to perform complex measurements without the corresponding expert knowledge.

The measurement values can be displayed in up to 16 graph windows. The display properties may be set before, during and after the measurement. The data acquisition and storage takes place in the background, independent of the choice of measurement values currently shown in the graphs.

The integrated REPLAY Mode allows the replay of stored measurements license-free on several computers. The zoom function of the data browser allows sections of a measurement to be selected, replayed and saved as new SAMURAI measurements. Furthermore, the SAMURAI-Option: Post Processing allows the subsequent analysis of stored time signals.

Depending on the device type, apart from the acoustic measurement channels, additional output and auxiliary channels are available. The output channels allow either the reproduction of the input signals during the measurement or the output of generated signals, such as white or pink noise. The auxiliary channels (where available on the device) allow the acquisition of slowly-changing signals. The digital inputs and outputs may be used as triggers, as tachometers or for GPS synchronization.

The measurement situation is documentable via text and audio commentaries.

SAMURAI contains many innovative functions:

  • Integration of a transducer database for common transducer types (microphones, accelerometers, voltmeters, tachometers, thermometers and hygrometers, as well as sensors for velocity, displacement, force, torque and pressure)
  • Multi-analysis function including signal recording, octave analyzer (1/1, 1/3), FFT analyzer, sound level meter, tachometer, auxiliary channels
  • Graph types for display of measurement data: sound level meter (numeric), level history, spectrum, sonogram, waterfall diagram, time signal, vsXref (level versus RPM), tachometer and further windows (see also Options)
  • Convenient adjustment of the display properties by the user
  • Administration of measurements via internal browser
  • Measurement data visualization via internal data browser
  • Data storage directly on external USB drives possible
  • Convenient calibration check
  • Comprehensive triggers and markers functionality
  • Display of 1/3-octave and FFT spectra in the same window
  • Display of the measurement data versus time or versus RPM
  • SAMURAI can make use of the PC sleep mode in order to switch the computer on and off for measurements at defined points in time
  • Import and export of weighting curves
  • Curve editor for reference spectra and weighting curves
  • Data export to the following formats : MS Excel, ASCII, wav, Universal File Format (UFF), ASCII Raw Signal, HDF 5.0, MDF 3.0, Noise & Vibration Works (NWWin), Windows Media movie, Quicktime movie
  • Sensor error detection (detects cable breaks for ICP sensors)
  • Level indicator


SAMURAI includes the following virtual instruments as basic functions for each channel:

Sound level meter

  • Class 1 according to IEC 60561, 60804, 61672
  • Simultaneous A, C, Z frequency weightings
  • Time weightings Fast, Slow, Impulse
  • Lp, Lmax, Lmin, Leq, Lpeak of all level values
  • LE, LAtm1/3/5, Ln
  • 10 Percentiles
  • Acquisition of “Taktmaximal” levels as well as impulse and low-frequency content
  • Parallel storage of up to 5 sound level meters per channel with 61 measurement values at freely adjustable time intervals
  • Triggered storage possible

1/3 octave and octave analyzer

  • 1/3 octave filter according to IEC 61260 Class 0
  • Third-octave and octave band analysis in real time
  • Third-octave middle frequencies from 0.04 Hz ... 80 kHz
  • Selectable third-octave band ranges (acoustics, vibration and user-defined)
  • Selectable averaging modes: linear, Fast, Slow, exponential
  • Simultaneous display of momentary, max, min and Leq spectra
  • Display and storage of total level
  • Display as bar, contour or line graph
  • Up to 5 third-octave and octave band analyzers per channel
  • Triggered storage possible

FFT analyzer

  • Bandwidth selectable in steps of 19 Hz, 39 Hz, ... 80 kHz with 101, 201, 401, ... 25601 lines
  • FFT windows: Rectangular, Hanning, Hamming, Kaiser-Bessel, Blackman, Flat-Top, Bartlett, Welch, Gauss, Cosine N/4, Cosine N/8, Cosine N/16, Cosine N/32
  • Window overlap: 25, 50, 75, 87, 93, 97 %
  • Averaging modes: Linear, Fast, Slow, general exponential
  • Simultaneous display of momentary, max, min and SEL spectra
  • Display and storage of total level
  • Bar, contour and line graph display; band values as RMS, Peak, Peak-Peak, EU2 or PSD value in dB or physical units
  • Up to 5 FFT analyzers per channel
  • Triggered storage possible

Time signal

  • Selectable signal bandwidths, DC ... 80 kHz
  • Triggered storage of time signal possible

The measurement values of these virtual measurement instruments can be visualized with the aid of the graph types listed above.
The following example shows a possible visualization of sound level, third-octave, FFT and time data.


New features

New functionality and improvements:

  • Analysis of saved time-signals - SAMURAI-Option: Post Processing
  • Data Browser (extended visualisation of the measurement data, with zoom and selection functionality)
  • Extended, new storage concept (multiple analyses, storage conditions and selection of the values to be saved)
  • Support for the DFTWR weather station - SAMURAI-Option: Weather Station
  • Simplification of the measurement modes
  • Level indicator also in STOP mode
  • Support for our new Apollo™_PCIe und Apollo™_light devices
  • Support for Windows 7/8/10
  • SAMURAI-option ORBIT
  • SAMURAI-option RADAR speed sensor
  • SAMURAI-option TONALITY ISO 1996-2 (Tonalitätsauswertung (ISO1996-2 Annex C) SAMURAI-Option: Tone Assessment ISO1996-2)

Analysis of Stored Time-Signals within a familiar, clearly-arranged graphical user interface (POST PROCESSING)

The SAMURAI-Option: Post Processing allows you to perform new analyses of stored time data. The new analysis is done similarly to a normal SAMURAI measurement, except that stored time data from a SAMURAI measurement or WAV files are used for the analysis.

Using the Data Browser, it is possible to limit the new analysis to a section of interest within the signal.

The new Data Browser - stored measurement data at a glance

The new Data Browser ensures that you always have an overview of the stored measurement data.

The picture on the left shows the clear representation of the values stored for a single-channel measurement in the Data Browser. It shows the time signal, the time history of a sound level meter value, and the total levels of the third-octave and FFT analyzers.

The zoom function allows sections of a measurement to be selected, replayed and saved as new SAMURAI measurements.

The new Storage Concept

he memory management scheme for the analyzed data has been radically improved. The new "Storage Conditions" allow individual measurement data to be stored only when specific, freely-definable conditions are met. The virtual measurement instruments (Signal, FFT analyzer etc.) only save their measurement data when their configured Storage Conditions are satisfied. Storage Conditions can, for example, be defined via triggers.

The trigger mechanism has also been extended, e.g. combined triggers can now be further combined to a new trigger.

Data reduction is now possible via a selection of the level values to be saved in the sound level meter.

Furthermore, analyses are now possible which use several virtual measurement instruments of the same type (up to 5 sound level meters, 5 FFT analyzers or 5 octave analyzers per channel). For example, during the course of a measurement, several FFT analyses per channel with different parameters can be calculated and displayed simultaneously.

Sound-Mapping without great effort

The new SAMURAI-Option: Sound Map enables sound-mapping of objects simply by means of an intensity probe or microphone .

During the intensity measurement on an imaginary surface, the position of the moving intensity probe is captured with a camera. Afterwards, the measurement data are then assigned via the video and the analysis data are mapped.

Weather Data in SAMURAI

Long-term monitoring according to the TA-Laerm regulations requires the capture of weather data synchronously with the acoustic measurement data.

With the new SAMURAI-Option: Weather Station, weather data are shown in a separate window and saved synchronously with the acoustic measurement data in a single SAMURAI measurement.

The new Measurement Modes

The measurement modes, together with the chronological control of the measurements, have been completely redesigned.

Several measurement modes of the previous version have been consolidated to a single "Autosave" measurement mode with freely configurable time-management. In particular for monitoring tasks, this consolidation results in a significant simplification simultaneously with an increased flexibility.

Determination of Tonality according to ISO 1996-2

With SAMURAI 2 and the new SAMURAI-Option: Tone Assessment ISO1996-2, tonality analysis according to ISO1996-2 Annex C is possible.

Status Graph

The new status graph provides easily recognizable visual information about the status of the current measurement (Run, Pause, Stop, Trigger active).

This graph is useful e.g. for measurements in moving vehicles.

Level Indicator

In order to detect a possible overload of the signal inputs as soon as possible, ideally before the start of the measurement, the level indicator now runs permanently (also in STOP-Mode).


Sensor Error Detection

SAMURAI 2, together with the new Soundbook_MK2 or Apollo™, detects cable breaks for ICP sensors.


Interfaces for Software Developers

SAMURAI Option: TCP/IP Interface

The SAMURAI Option TCP/IP Interface allows external programs to configure and operate SAMURAI as well as to receive measurement data from SAMURAI via TCP/IP. Thus, SAMURAI is networkable.

System Requirements

At least Intel® Pentium® or AMD Athlon™ XP processor (Intel® Core™2 Duo processor or better recommended):

  • 2 GB RAM
  • Windows® 7, Windows® 8 or Windows® 10
  • HARMONIE™, Apollo™, Soundbook™, Soundbook_Expander, ™SWING™, NoisePAD™, Hurricane™, Tornado, Typhoon


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