A rattlesnake's warning is deep and low, so the simile is emphasizing how uninterested Jim is.
Context: ... not interested-so fucking not interested..." as jim marched out of the bathroom with a towel around his hips and water dripping off his hair, his voice was deep and low
Hypothesis: ... not interested-so f**king not interested..." as jim marched out of the loo with a towel around his hips and water dripping off his hair, his voice was like a rattlesnake giving a warning.

Given this context, determine if the hypothesis is true (Yes, no, or unknown)?