RACAL / INVISIO: Relocation and Rebuild of an Anechoic Chamber

Relocating and modifying a 10-year-old anechoic test chamber for a new site with reduced space — delivered on time and to spec.

Project overview

QuietStar was appointed to relocate and modify an existing anechoic chamber for RACAL Acoustics (now INVISIO), moving it from Harrow to the company’s new site in Watford.

The chamber was originally supplied over a decade ago and required significant modification to fit within the new building’s lower ceiling height. In addition to the relocation, QuietStar manufactured new parts, acoustic foam wedges and electrical components, delivering a fully reconfigured, operational acoustic test room.

The project was completed within a tight summer programme, ensuring minimal disruption to the client’s R&D and production timelines.

RACAL 5

The Brief

RACAL (INVISIO) required the relocation of their 10-year-old IAC anechoic test chamber from Harrow to a new R&D facility at Croxley Park, Watford.

The new site presented a significantly lower internal height, meaning the chamber could not simply be rebuilt as before. Instead, QuietStar was tasked with adapting the chamber’s structure while maintaining acoustic performance as much as possible.

Complicating matters further, original design drawings were not available from the previous supplier, requiring the team to work from on-site measurements and engineering expertise.

Our Approach

QuietStar provided a turnkey relocation service, managing every stage of the process:

  • Safe dismantling of the existing chamber and foam wedge system

  • Disposal of old wedges to avoid damage and performance issues

  • Storage of chamber components at our facility during modification works

  • Design and manufacture of new parts to accommodate reduced ceiling height

  • Supply of new acoustic wedges and upgraded electrical elements

  • Rebuild and commissioning at the Watford site

The project was completed in phases over summer: dismantling and storage in June, manufacturing through July, and delivery and installation in August.

The Results

  • Chamber successfully relocated and modified to fit new site constraints

  • New acoustic foam and infrastructure installed

  • On-time delivery within 8 weeks from dismantling to reinstallation

  • Maintained functional acoustic test capability despite reduced wedge length and access modifications

  • Minimal downtime for RACAL’s engineering operations

Rw 77 dB

acoustic performance verified by independent specialist testing

60-min

60-minute fire resistance to EN 1634-1

19 Elements

installed (8 doors, 11 windows) with zero test failures

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