stimulus/white_noise WhiteNoise Property definitions to describe a white noise stimulus. Modality The stimulus modality like acoustic, haptic, light etc. string Duration The duration of the stimulus in seconds. float s OffsetTime The temporal offset (with respect to the begin of the recorded trial) with which this stimulus was presented. float s Function The function of the described stimulus. E.g. if the white noise constituted the carrier. string OutputChannel The physical output device (e.g. an analog output channel, a monitor screen, the same loudspeaker, etc.). This information can be used to explicitly express that several stimuli (that share the same OutputChannel) are jointly presented. string Mean The mean intensity of the white noise stimulus. float Variance The variance of the white noise stimulus. float LowerCutoffFrequency The low frequency cutoff of the highpass filter with which the stimulus was filtered. (Lowest frequency may also be limited by the stimulus duration) float Hz UpperCutoffFrequency The upper frequency cutoff of lowpass filter with which the stimulus was filtered. (Upper cutoff may also be defined by the nyquist frequency, respective the sample rate.) float Hz Filter The filter method applied to limit the frequency content of the stimulus. string Position The position of the stimulus on e.g the screen. Specified as a 2-tuple (x;y). By default this position refers to the top-left corner of the object or its bounding box. 2-tuple PositionReference [top-left, center, bottom-right] By default stimulus positions are specified by the coordinates of the top-left corner (or of the bounding box). Use this property for other definitions. string SpatialExtent The spatial extend of the presented stimulus (width;height) e.g. (1024;768). 2-tuple