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Acoustic and Vibration Software


SAMURAI Acoustic and Vibration Software by SINUS Messtechnik GmbH

Software for Multi-Channel Instruments


SAMURAI (Acoustic Multichannel Universal Real-time Analysis Instrument) is the software developed by SINUS Messtechnik GmbH for it’s range of multi-channel data acquisition and analysis instruments, including Soundbook, Noise Pad, Apollo and Apollo Lite Boxes, Apollo PCIe Cards.

SAMURAI is a universal software package for noise and vibration measurements and real-time analysis.

SAMURAI software facilitates 2-, 4- or 8-channel Class 1 sound level meters conforming to the IEC60651 / IEC 60804 / IEC 61672-1, IEC 651 and IEC 804 standards.

SAMURAI software features excellent display capabilities not only during the measurements but also during the post-processing of the measurement data.

The basic principle of the software is that activated measurement channels are virtual measurement instruments. There are various types of virtual measurement instruments, differing in the types of data provided and the ways in which the data may be displayed on the screen(e.g. sound levels, spectra, time signals, level versus time recorder, speed, RPM, transfer functions, video, slow channels…). Each display may be individually customized and may include comparison of data from different measurement channels, or with standard reference curves.

The 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 software 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 where the 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 simultaneously on screen in up to 16 graphical windows. The display properties of each window 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 graphical windows.

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 a new measurement. In addition, the 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 software includes the following virtual instruments functions on 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

Level recorder


Waterfall Plot

All of the functions of the SAMURAI are described on the SINUS Messtechnik GmbH:

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