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Non-Visual Guidance

CaterPillar™

Non-visual acoustic guidance for blind and low-vision guests

Architecture Continuum
CaterPillar™ acoustic guidance stations

CaterPillar™ is the Mad Systems non-visual guidance system for blind and low-vision navigation in physical venues. It uses spatially located audio ticks or pulse beacons emitted from stations to help guests orient, move, and reach points of interest more independently within museums, visitor centers, attractions, and other public environments.

Rather than treating accessibility as a separate afterthought, CaterPillar™ brings non-visual wayfinding into the architectural logic of the venue itself. It supports safer navigation, greater confidence, and a more equitable visitor experience while remaining compatible with broader accessibility, operational, and interpretive goals. CaterPillar™ is cane-compatible - it works with standard white canes - but it is fundamentally an acoustic environment, not a haptic device.

How it works

Acoustic Spatial Guidance

CaterPillar™ stations are placed at decision points throughout a venue: at exhibit entries, path junctions, room exits, service locations, and points of interest. Each station emits a spatially distinct audio tick or pulse beacon. A blind or low-vision visitor uses these signals to orient - turning toward the sound of a destination, judging proximity from signal strength and timing, and navigating the physical space through auditory localization in the same way a sighted visitor navigates by sight. No wearable required. No smartphone required. No language assumed.

Station-based acoustic signals
Physical stations placed at navigation decision points emit precisely timed, spatially distinct audio ticks or pulse beacons. Visitors orient toward destinations by following the signals - the same perceptual mechanism as locating a sound source in space.
No wearables, no tracking
CaterPillar™ does not require any wearable device. It does not track visitor location or identity. It emits guidance signals into the environment. Visitors receive those signals passively through their own hearing and orientation.
Language-neutral by design
Acoustic pulse signals carry no linguistic content. CaterPillar™ works regardless of which language the visitor speaks, reads, or uses. Navigation is universal without translation or localization.
Cane-compatible
CaterPillar™ is fully compatible with standard white cane use. Visitors who use a cane navigate the physical environment with the cane while using CaterPillar™ acoustic signals for orientation and destination-finding.
Runs on QuickSilver® nodes
CaterPillar™ stations run on the same non-proprietary QuickSilver® compute infrastructure as other AV++® technologies. No specialized hardware category required. Deployment, maintenance, and support follow standard AV++® procedures.
Resilient and degraded-mode capable
The accessible navigation path remains functional during partial system degradation and incident modes. Accessibility is not dependent on full-stack operation - CaterPillar™ is designed to be reliable when it is most needed.
Stack relationship

CaterPillar™ in the AV++® Architecture

CaterPillar™ is an AV++® technology. It runs on QuickSilver® nodes and integrates with WorldModel™ for coordinated venue-wide accessibility governance. In full AV++® deployments, visitors can receive Alice® interpretive content and Lory® multilingual audio through their own devices while CaterPillar™ handles physical navigation - the three systems working in parallel, each addressing a different layer of the accessible visit.

CaterPillar™ handles
Physical orientation and navigation through the venue space - where to go, which path to take, how to reach the next destination independently.
Alice® handles
Interpretive and narrative content at each exhibit - what this object is, what it means, what the visitor should understand - delivered in their language and at their chosen depth.
Lory® handles
Accessible media delivery - captions, sign language, hearing aid streaming, multilingual audio - synchronized with the main show and delivered to the visitor's own device.
Patent pending
CaterPillar™ patent applications are pending in the US covering acoustic spatial guidance methods for blind and low-vision navigation in public venues. View the patent portfolio →

CaterPillar™ is patent pending and available for direct deployment as part of the AV++® architecture. Specification guidance and early-stage consultation are available before construction documents are issued.

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