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Sound Intensity Software

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Sound Intensity Software Option by SINUS Messtechnik GmbH

Multi-channel data acquisition system + SAMURAI Software + Option: Sound Intensity

Sound intensity probes may be connected to multi-channel data acquisition systems using SAMURAI software plus the Sound Intensity Option  by SINUS Messtechnik GmbH.

In addition to the basic SAMURAI software the Sound Intensity SAMURAI Option is necessary for sound intensity measurements and analysis.

Screenshots and descriptions of the software options are provided below:

Figure 1.
Sound pressure and intensity spectrum

Figure 2.
Sound pressure, intensity and power spectrum, P-I Index + Phase, Particle velocity, acoustical impedance and cross-spectrum

When investigating acoustic emission and propagation processes, the direction- and frequency-dependent energy flow of a sound field is of interest and is described by the sound intensity (energy per area and time, unit W/m2).

Sound intensity measurements are used for locating sound sources or to determine the sound power emitted from a surface. Determining the sound power by means of sound intensity measurements rather than by methods based only on sound pressure measurements has the advantage of suppressing extraneous sound sources.

Sound intensity measurements can also be used in the field of building acoustics to determine the transmission loss R ‘.


Using the two microphone signals from a sound intensity probe, the Sound Intensity Options calculate the sound intensity at the position of the probe in the axial direction of the microphones. The frequency-dependent intensity is calculated and displayed in third-octave bands, or constant-width bands (the number of lines is selectable).

By rotating the probe through 360 degrees, the direction of maximum intensity can be identified.

For stationary noise sources the scanning method may be used to determine the sound power emitted from a defined surface.

The procedure implemented for determining the sound intensity is based upon analysis of the phase differences resulting from the different paths between the sound source and the two microphones. The software enables the measurement chain to be calibrated with regard to both sound pressure levels and phase.

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