Sorama Portal processing

What can I achieve using the Sorama portal?

It’s all about Making Sound Insightful.

For you as a -future- portal-user it is interesting to know what you can achieve.

In this section we like to illustrate the main features that are commonly used.

sorama cloud analyze portal cam64 acoustic camera microphone array

The Sorama Analysis Portal supports the following Analysis techniques:

FAR FIELD ANALYSIS

The Far Field / Beam forming Sound Image shows locations of sound sources using a colored image. This is comparable to a thermal camera, but instead of visualizing temperature the Far Field panel visualizes sound intensity. Locations where sound is coming from will have higher values. These locations don’t necessarily have to be sound sources, but can also be, for example, reflections of sound against a reflective surface, such as a wall, window or table. The Sound Image will scale automatically based on the incoming sound. The color mapping depends on the selected Colormap. The color bar below the Sound Image shows the mapping of colors to values.

The sound images displayed in this module are obtained using a technique called beam forming. Using this technique it is possible to generate a ‘filtered’ audio signal for a specific position in space. This module allows you to select a position in the visible area of the webcam for which to generate such a ‘filtered’ audio signal. You can give this signal a name that reflects the position of the signal. The signal is then listed in the ‘Analysis Overview’ module allowing you to analyse this signal using a number of analysis modules such as ‘Spectral Analysis’, ‘Time Analysis’ and ‘Spectrogram Analysis’. This feature is especially useful for comparing multiple acoustic sources in the sound image. Another use case for this feature is to find reflection paths by comparing delays per probe in the ‘Time Analysis’ module.

NEAR FIELD ANALYSIS

The Near Field / PNAH (Planar Near Field Acoustic Holography) Sound Image shows the dynamic behavior of the acoustic -pressure, -velocity or -intensity. Any projection plane between the measurement plane (distance = 0) and the source plane (distance = measurement distance) can be computed. The sound image (when using Pressure or Velocity projections) can be played as a video, the video represents a full period of the selected frequency. This means that when analysing a frequency of 1000Hz the video duration is 1/1000th of a second. Use this module to gain insight into the dynamic behavior of a sound source at close distance (typically closer than 10cm). Also keep in mind that different frequencies reveal different dynamic behavior. Using a properly matching sound image is highly recommended. The color bar below the Sound Image shows the mapping of colors to values.

SPECTROGRAM ANALYSIS (WATERFALL PLOT)

The Spectrogram is a time-frequency diagram. The X-Axis of the spectrogram displays the time from left to right. The Y-Axis of the spectrogram displays frequencies from top to bottom. The colors in the spectrogram represent the intensities of those frequencies at a certain time. The color mapping depends on the selected Colormap. The colorbar below the spectrogram shows the mapping of colors to values.

SPECTRUM ANALYSIS

The Frequency Spectrum is the distribution of the amplitudes [dB] of each frequency component against frequency [Hz]. In other words: Your recording consists of a lot of frequencies which all contribute to the sound in another way. High dB values represent a large share in the sound and low dB values represent a small share. For instance: If there appears to be a peak (high dB value) at a certain frequency, this means that this frequency is particularly present in your sound recording.

TIME ANALYSIS

The Time Analysis graph shows the pressure of the audio signal measured by the selected microphone(s) of an Acoustic Camera or of a (Far-Field) probe.
A probe is an audio signal of a specific position within a Far Field measurement. This audio signal can be analysed as a normal measurement using analysis modules such as ‘Spectral Analysis’ and ‘Time Analysis’.

Using the Time Analysis module and its time selection feature, it’s possible to split up longer measurements into a shorter measurement. This enables you to easily select and analyze non-stationary or transient sounds.

Other features of the Sorama Portal

  • Use the acoustic camera as a plain dB-meter

  • Translate the frequency-spectrum into octave or 1/3 octave-bands

  • Visualize the frequency-spectrum in a linear or logarithmic scale

  • Export the visualized data to a .CSV file

  • Easily export results in file formats supported by Powerpoint (PNG, JPEG, MP4 & WEBM)

  • Parallel live streaming with sound level meters, spectrum analyzer, waterfall, Far Field imaging and Near Field Sound Pressure imaging

  • Listen and analyze specific positions in Far Field Analysis

  • Quickly see the SPL values of selected frequency ranges

SORAMA PORTAL MEMBERSHIP

  • The Sorama product-line of Acoustic Cameras and Cloud Analysis Portal are available for you via a simple three step selection process:

    1. Choose your device: Sorama CAM64 or CAM1K.

    2. Choose a Sorama Portal membership (fit for your needs and credit buffer).

    3. Buy a Sorama credit package (required for analyzing measurements).

    This three-step-deal enables you to perform best-in-class Sound Imaging measurements (both far- and near-field in one), automatically process and export sound images/videos, store and manage projects online, measure in the field and easily analyse anywhere.
    Sorama credits are valid as long as you have a valid and continuous Portal Membership, while you have active Sorama credits you can operate the Sorama acoustic camera and Sorama Portal.

    Contact us for more info on actual pricing, our package deals or custom set-ups. There is always a selection that fits your needs.v

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