Outline puts acoustics to the test

Designed in collaboration with the Department of Mechanical and Industrial Engineering at Brescia University, Outline has unveiled the GSR (Globe Source Radiator) to assist 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. The GSR is also applicable in automotive, industrial, scientific and commercial settings, since numerous essential acoustic parameters may be derived from measurements made using it as a sound source. The GSR can determine Clarity Indices (C50, C80), Intelligibility Indices (AlCons, STI, RASTI), Reverberation Time (RT60), Early Decay Time (EDT), Soundproofing Power, Impulse Response and Intensity (G). It is also fully ISO10140, ISO354, ISO3382 and DIN 52210 compliant.

The design combines a spherical enclosure with an Ergal aluminium inner structure that houses 12 5-inch neodymium-magnet transducers and is reportedly the first such device to include a bass-reflex design to extend its frequency response. The Italian manufacturer states that the GSR is also the only truly spherical device of its type available today, with its globe design reportedly eliminating diffractions, reflections and other anomalies caused by non-spherical radiators, which can compromise the accuracy of data measurement. The GSR is capable of producing a maximum SPL of over 130.3dB.

The device 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 setup 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.