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The Problem

Speech leakage is an
operational security risk.

In government facilities, legal boardrooms, defence SCIFs, and confidential consultation environments, speech travelling through walls and structures compromises security.

Traditional solutions are heavy, thick, structurally invasive, and visually disruptive. Low-frequency speech components — which carry the most intelligibility — are notoriously difficult to attenuate with conventional mass-law materials. A new approach is needed.

The Challenge

Three design constraints
for secure environments.

01

Lightweight

Retrofit without structural modification. No mass-law bulk. Panel geometry creates the performance — not thickness or weight.

02

Measurable

Every installation is validated with before/after transmission loss measurement. Performance is proven — not assumed or simulated.

03

Scalable

Modular tile system scales from single panel testing to full-room deployment. Repeatable manufacture.

The Solution

Acoustic bandgap panels.

The panels use acoustic bandgap architecture — geometry tuned to speech-relevant frequencies (250 Hz – 4,000 Hz). Multiple unit sizes tile together with dovetail connections, supported by chemical bonding links for layered material coupling.

Lightweight enough for retrofit into existing rooms without structural modification. Validated using before/after transmission loss measurement — delivering up to 45 dB improvement.

Puzzle-like interlocking geometry Dovetail connection points Chemical bonding links Repeatable manufacture
Evidence

Measured results.

"Performance must be measurable, not assumed."
45 dB

Improved transmission loss

250 Hz – 4 kHz

Speech band coverage

Validated

Before/after measurement

Development Roadmap

From component to room-scale.

1

Full-wall prototype

Increase test area; validate room-scale acoustic behaviour.

2

Material refinement

Optimise layer bonding, damping, and low-frequency response.

3

Manufacturing optimisation

Improve repeatability, assembly process, and cost efficiency.

4

Before/after validation

Measure baseline and treated acoustic transmission for client evidence.

Discuss your secure speech requirements.

Share your operational constraints. We'll map a geometry-led solution with a before/after measurement plan.

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