Credit & reuse status
Multimodal Acoustic Trap Display butterfly — University of Sussex / MATD research team; individual photographer not specified. No open reuse permission established; owner review pending. Resized / WebP conversion; full frame retained. REFERENCE ONLY — NOT CLEARED FOR PRODUCTION.
Follow the particle, not the headline
The University of Sussex’s 2019 Multimodal Acoustic Trap Display used ultrasound to position a small particle while colored light illuminated it. The institutional report describes a volumetric image together with audible and tactile output. Its news index records 13 November; the article shows a 19 November update. We retain both dates rather than turning an update into a new historical event.
The original source image is a small photographic reference, not a high-resolution commercial product shot. Its luminous trace is evidence of the demonstrated appearance, while the written research description explains the trapping mechanism. Neither should be replaced with an invented rendering of a large person floating in a room.
Three channels do not mean three proven experiences
“Multimodal” is useful here because it identifies different senses. It does not automatically establish that a user sees, hears and feels a complete solid object, or that every effect can operate at arbitrary scale. The source reports a prototype and discusses possible future uses. It does not provide an installation quote, a public showroom schedule or independent venue testing.
For anyone evaluating a related system, separate the visual, audio and tactile tasks. Ask what information each channel carries and which parts are demonstrated together. Then ask what an observer can perceive without the explanation. A noticeable sensation and a useful interface are related possibilities, not interchangeable findings.
Why timing becomes a design question
A scanned image asks the audience to perceive a coherent form from activity over time. Adding another output makes coordination part of the experience. Rather than assume synchronization from a still frame, request a live demonstration in which a simple visual cue, audible cue and intended touch response can be observed together. This is our proposed evaluation method, not a claim about measured performance.
Choose a modest task: find a marked location or identify a change in a displayed shape. Avoid beginning with a complex simulated character whose many cues make it difficult to understand what the system actually contributes. A small, repeatable task can reveal whether the combined output helps someone do something they could not do as easily with one channel.
The useful comparison with optical trapping
BYU’s optical-trap example and this acoustic approach can look related because each produces a luminous trace with moving material. The way that material is controlled is different. Naming the control mechanism prevents two experimental paths from collapsing into the same vague promise of a “hologram.”
Keep a research record containing the apparatus description, demonstrated content, source date and open deployment questions. Link to current institutional work if you need to pursue a collaboration; do not treat the old announcement as a guarantee of present access or availability. The historical contribution is a broader design possibility: a spatial display can be studied as a coordinated sensory interface, rather than judged only by how impressive its photograph looks.
Sources & dates
Factual descriptions are drawn from these sources. Practical evaluation suggestions and interpretations are Presence Atlas editorial analysis; no hands-on test is claimed. Supplier claims are identified as such.
University of Sussex / Neil Vowles · Original publication: 2019-11-13 · Retrieved 16 September 2026 · University news index records 13 November; article displays a last-updated date of 19 November.
University of Sussex · Original publication: undated · Retrieved 16 September 2026 · Used to corroborate original article date; a pagination URL can move over time.
Editorial preparation: 16 September 2026. Actual site publication: pending review. This is a retrospective, not reporting published by us in 2019.