Wearable Olfactory Device Enhances VR Experience

A multi-channel wearable scent show developed at Institute of Science Tokyo permits a person to expertise a number of scents whereas exploring digital environments. Based on digital scenes, the gadget can mix as much as eight fragrances in actual time and ship them with exact management of odor depth. By synchronizing odor with digital actuality content material, the gadget allows higher immersion and realism-opening new prospects for enhanced digital leisure, life like simulation coaching, and future digital scent applied sciences.

Virtual Reality (VR) applied sciences are quickly advancing, permitting customers to see and listen to extremely life like digital environments. But most VR techniques solely depend on visible and auditory experiences, leaving out one of the vital highly effective human senses-the sense of odor. Research exhibits that the sense of odor is strongly linked to reminiscence, feelings, and environmental notion. However, incorporating a number of scents into VR experiences stays difficult.

Olfactory shows are units that generate scents in response to digital content material. Although promising, most of those units are cumbersome and troublesome to combine into wearable VR techniques. To overcome this, a group of researchers led by Specially Appointed Professor Takamichi Nakamoto from Laboratory for Future Interdisciplinary Research of Science and Technology (FIRST), Institute of Integrated Research, Institute of Science Tokyo (Science Tokyo), Japan, together with Doctoral Student Zhe Zou from the Department of Information and Communications Engineering, School of Engineering, Science Tokyo, and Kelvin Cheng, R&D Manager at Rakuten Mobile, Inc. and Rakuten Institute of Technology, Japan, has developed a multi-channel wearable olfactory show able to producing blended scents in actual time. Their findings had been revealed within the IEEE Sensors Journal on February 23, 2026.

“We created a small-sized scent generation system that can be worn together with a VR device, so a user can experience scents that match the virtual environments as they explore, and a single user can use it at the same time,” explains Nakamoto.

One of the important thing options of this gadget is its means to mix a number of scents to match the VR show in real-time. It can mix as much as eight completely different perfume parts concurrently, and by adjusting their mixing ratio, the system can reproduce a variety of scents. The researchers achieved this by optimizing the strategies for supplying and controlling fragrances whereas limiting the dimensions of the driving circuit.

“We wanted to develop a system that could reproduce complex scents quickly during immersive virtual experiences,” notes Nakamoto.

To make this exact management doable, the group used a number of specialised parts inside the gadget. For scent technology, they used a microdispenser that releases extraordinarily small droplets of liquid perfume, together with a floor acoustic wave atomizer that makes use of ultrasound to transform the liquid droplets right into a fantastic mist, which might be simply detected as scent. Additionally, additionally they included an electroosmotic pump (a tool that strikes liquids utilizing electrical forces) to precisely management the quantity of perfume delivered to the microdispenser at any given time. Together, these parts guarantee secure scent technology with minimal delay.

The researchers then examined the gadget by measuring how precisely it managed the odor focus and the way shortly it generated scent. Through a number of experiments, they optimized the system to provide scent ranges appropriate for human notion in sensible settings.

“We also created virtual travel content using these devices, so that users could visit various virtual locations and experience the scent at those places for a realistic travel experience,” provides Nakamoto.

After testing, the members reported that including scents considerably improved the sense of presence within the digital setting. The gadget was additionally demonstrated at a number of worldwide conferences and occasions, the place many attendees skilled the know-how first-hand. According to the authors, combining the smell-based suggestions with visible and auditory cues transforms the notion of the digital setting, making it really feel much more life like and interesting.

Beyond leisure, the know-how may have potential functions in advancing simulation-based coaching and therapeutic packages to stimulate reminiscence and rehabilitation, particularly for aged folks, in addition to immersive demonstrations for perfume merchandise. As digital scent know-how continues to evolve, this innovation marks a major step in bringing multi-sensory digital experiences nearer to actuality.

Authors:

Zhe Zou¹, Takamichi Nakamoto²*, Hsueh Han Wu³, Kelvin Cheng^3,4, Sungho Lee³, and Shoichi Hasegawa²

*Corresponding creator

Title:

Development of an Eight-Channel Wearable Olfactory Display for Virtual Reality

Journal:

IEEE Sensors Journal

Affiliations:

¹School of Engineering, Institute of Science Tokyo, Japan

²Institute of Integrated Research, Institute of Science Tokyo, Japan

³Rakuten Mobile Inc., Japan

⁴Rakuten Institute of Technology, Rakuten Group Inc., Tokyo, Japan