Designed in collaboration with the Department of Mechanical & Industrial Engineering at Brescia University, and engineered in Italy by Outline, the Globe Source Radiator (GSR) high-power omnidirectional sound source is a new tool for acoustic analysis.

Optimised acoustics are prerequisite in many modern buildings, and for some (classrooms, offices, theatres, and concert halls for example) their acoustic properties determine how well they are able to perform their core purpose.

Outline Globe Source RadiatorAccurate and reliable test data is essential for those engaged in the design and construction of these spaces, and a powerful omnidirectional sound source is invaluable in the testing of acoustic insulation of internal walls, floor slabs and insulation from the external environment, plus the acoustic properties of any internal space where sonic performance is important.

GSR’s usefulness extends into automotive, industrial, scientific, commercial and other areas, since numerous essential acoustic parameters may be derived from measurements made using it as a sound source: Clarity Indices (C50, C80), Intelligibility Indices (AlCons, STI, RASTI etc), Reverberation Time (RT60), Early Decay Time (EDT), Soundproofing Power, Impulse Response and Intensity (G) and others may be determined. The GSR is also fully ISO10140, ISO354, ISO3382 and DIN 52210 compliant.

GSR’s design combines a robust spherical enclosure with an Ergal aluminium inner structure that houses 12 5-inch neodymium-magnet transducers and is the first such device to include a bass reflex design to extend its frequency response. It is also the only truly spherical device of its type currently available; its ‘globe’ design eliminating diffractions, reflections and other anomalies caused by non-spherical radiators, which can compromise the accuracy of data measurement.

The GSR is capable of a maximum SPL of more than 130.3dB, a figure far in advance of any other comparable product presently available and a remarkable output from a spherical loudspeaker 310mm in diameter.

The GSR is available as a part of a complete user-ready kit, comprising a GSR, an NG01 Noise Generator, a compact amplifier (Outline’s L3000) plus the necessary cables, a transportation bag and a set of mounting accessories, providing a portable set-up ready for immediate deployment. A dedicated self-powered subwoofer kit is also available and is suitable for applications where measurements of low frequency data are required.


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