Panning values for Sound samplers
I am building an experiment in which, for each trial, I would like to play a sound with a higher volume in one ear than the other ear. For example, let's say the sound is someone saying "cow", for one trial, I would like that sound played in both ears, but I want it to be played 3 times as loud in the left ear as the right ear. I know I can do this by changing the "Panning" value in the sound sampler node and that 0 is the default, but the documentation only says "Positive values toward the right; 'left' or 'right' for full panning". It gives no description about what values correspond to what ratios of volume between channels. I tried using random values such as 20, -20, 5, -5, 2, -2, 1, -1, etc. and comparing how they sound, but it's difficult to determine the actual ratio of volume for each one. Does anyone know what the values may be and what ratios they correspond to?