Haptic technology in general not harmful to the human body and can be focused easily. One company called Ultrahaptics has been working with this technology to provide non-contact haptic feedback. Founded in 2013, Ultrahaptics has focused on providing users haptic feedback in free space using ultrasound technology. They use multiple ultrasound speakers to make changes in the air pressure around the user. This provides the ability to feel the pockets of pressurized air focused in the environment. This gives the user tactile cues for gestures, invisible interfaces, textures, and virtual objects. The company is continuing to grow and launched their evaluation programme
The Senses (Rembrandt) The Senses (Rembrandt) The Senses is a series of five oil paintings, completed by Rembrandt, depicting the five senses. The whereabouts of one, representing the sense of taste, is unknown. Another, representing smell, was only re-identified in 2015. Rembrandt was only around eighteen years old when the paintings were made; they are his earliest surviving works, and are of identical size. In about the 1720s the four known paintings were extended, but only one, "Smell", retains the additions and those are now concealed by its frame, so that it appears to retain its original format. Three of the extant paintings,