Okay, well instead of giving articles from the Washington post (which knows nothing about reptiles), I will give you info from a qualified veterinarian. Full article:
The Vet Report: Contrary To Popular Belief, Snakes Can Hear
"All reptiles have the ability to hear, albeit, to different degrees. Snakes, as a group, have the least developed sense of hearing, but they can hear. In addition, snakes have excellent vision, as well, and infrared heat sensing pits in their upper and lower lips." (Mader)
"Snakes lack external ears (pinna), ear canals (external auditory meatus) or external ear drums (tympanic membrane) as is seen in most other reptiles, but they have well-developed internal ears and can hear sounds from 40 to 2,000 hertz; the human voice averages 500 to 1,000 hertz, and thus, is within the range of hearing of a snake." (Mader)
I rest my case. I'm not blaming you though, lots of people think snakes can't hear, and can only "hear" vibrations. But, as Douglas Mader said, snakes have the ability to hear the human voice just fine.
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