stimulus/white_noise WhiteNoise Property definitions to describe a white noise stimulus. Modality string The stimulus modality like acoustic, haptic, light etc. Duration float s The duration of the stimulus in seconds. OffsetTime float s The temporal offset (with respect to the begin of the recorded trial) with which this stimulus was presented. Function string The function of the described stimulus. E.g. if the white noise constituted the carrier. OutputChannel string The physical output device (e.g. an analog output channel, a monitor screen, the same loudspeaker, etc.). This information can be used to explicitely express that several stimuli (that share the same OutputChannel) are jointly presented. Mean float The mean intensity of the white noise stimulus. Variance float The variance of the white noise stimulus. LowerCutoffFrequency float Hz The low frequency cutoff of the highpass filter with which the stimulus was filtered. (Lowest frequency may also be limited by the stimulus duration) UpperCutoffFrequency float Hz 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.) Filter string The filter method applied to limit the frequeny content of the stimulus. Position 2-tuple 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. PositionReference top-left string center string bottom-right string 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. SpatialExtent 2-tuple The spatial extend of the presented stimulus (width;height) e.g. (1024;768).