Spiders cannot necessarily “hear” as they do not actually have ears. They do however have sensory nerves (tiny hairs) that are located in the ends of their legs. These tiny hairs are also known as thrichobotria; which they use to search for vibrations or squeaks from mates. Certain spiders are even known to emit a squeak that is inaudible to the human ear.
Spiders are very interesting creatures that feel vibrations that act in a way that sound does and allow the spider to locate where the sound is coming from as well as its approximate distance from the spider. Put in simpler terms, the spider is able to interpret the movement of air that is produced by a sound something makes in order to determine its exact location. Along with hairs on their legs, spiders are also equipped with tiny slits all over their legs for feeling vibrations. So spiders may not be able to “hear” you, but the senses they are equipped with still make it a possibility for them to know when you or potential danger is nearby.