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Beyond sight and sound, VR developers want you to physically feel virtual objects, using gloves and vests with motors and actuators.
Haptic feedback uses vibration motors, force-resisting actuators, or focused ultrasound in gloves or vests to physically stimulate skin, simulating pressure, texture, or impact. This adds a physical dimension sight and sound can't provide, letting a user feel a virtual gun's recoil or an object's resistance.
Acoustic feedback relates to sound, like microphone screech near a speaker, and optical feedback relates to light, neither describing simulated touch.
Some advanced haptic systems use ultrasound to create mid-air touch sensations with no glove at all, focusing sound waves at a point in space to press gently against bare skin.
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