Defines the scaling factor to apply for high frequencies.
|Excepted Data Source||1 component value|
|Data Range||0 upwards|
The sound.transmission.upper texture property defines the scaling factor to apply to sound.transmission for high frequencies. The scale factor changes linearly from lower to upper value depending on frequency. Walls typically filter out higher frequencies allowing lower frequencies to pass easily.
The source is typically a single positive value including 0.
The default value for this texture property is 0.28.