Signal Profiles

In SAS, you can associate so-called profiles with any signal. A profile is a signal that has a relationship with, and has the same duration as the signal with which you want to associate it.

Associating a profile is required to be able to display some curves (for example psychoacoustics indicators or order levels) with a different abscissa (for example as a function of RPM or temperature evolution).

There are several types of profile:

  • An RPM Profile is a specific kind of profile that represents the evolution in time of the revolutions per minutes of a rotating machine.
  • A PWM Profile is a specific kind of profile that represents the evolution in time of the Pulse Width Modulation frequency phenomenon.
  • A Generic Profile is used for the management of any type of non-specific profile. You can use it to store any quantity evolution vs. time that is suitable for association with the signal of interest.

When saving one or more signals that already have associated profiles in the Sound: Analysis and Specification WAV (*.wav) format (see File Formats), the associated profiles are also saved, so that they remain associated when opening this WAV file later.

When you import a file that already has an associated profile, this is shown next to the Profiles heading in the file Information panel of the time domain window. If the signal has no associated profile, there will be no profiles listed next to this heading.

Each profile associated with a signal will also be added to the number of Channels shown in the Information panel.

You can open the profile by clicking the button next to the listed profile. This will add the profile waveform to another block in the 2D Curve Management.

From the time-frequency representation window, you can select View > Display RPM profile, View > Display PWM profile or View > Display a profile to open that profile in a time domain window. If the signal has no associated profile, these options will be unavailable.

You can also manually associate a profile with an imported signal. See Associating an RPM Profile with a Signal, Associating a PWM Profile with a Signal and the general case of Associating a Profile with a Signal.