Foenics - FPI's - SonaView
The SonaView FPI visualizes the spectral content of a signal. It can be used for the identification of special disruptions in speech signals with persistent frequencies, for example, hum.
When applying this FPI, it is easy to detect frequency characteristics of a specific speaker in speech signals, which is currently one of the main problems in the forensic area of operations. The frequency range of the spectrogram can be varied, i.e. the operator can zoom-in on specific parts of interest to get a closer look. The timescale is extended to display ten seconds of the signal. This allows a very detailed analysis of the signal for forensic purposes.
Three values (frequency, amount and time) of the current mouse position in the display are shown. The signal levels are represented by an adjustable range of colors which help to emphasize certain ranges of the spectrum.
In the case of a stereo recording, the user can view the spectra-range of both channels, or switch between the left and right channel (cancellation effects caused by phase inverted channels).
