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Communications of the ACM

ACM TechNews

Wireless Olfactory Feedback System Lets Users Smell in VR World

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A woman smells a flower.

The new technology showed potential for helping amnesic patients recall lost memories, as odor perception is modulated by experience, leading to the recall of emotional memories.


Scientists at China's City University of Hong Kong and Beihang University have created a wireless olfactory feedback system that incorporates smells into virtual and augmented reality via miniaturized odor generators (OGs).

The system heats and melts odor-infused paraffin wax on OGs to induce phase changes and release different scents with adjustable concentrations.

The researchers engineered a skin-integrated dual-OG array that can be mounted on the upper lip to deliver odors rapidly.

They also designed a flexible facemask with nine OGs that can dispense hundreds of blended odors.

Volunteers were able to identify the OG-generated smells with 93% average accuracy.

From City University of Hong Kong
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Abstracts Copyright © 2023 SmithBucklin, Washington, DC, USA


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