Optimized acoustics are a prerequisite of many modern buildings and for some (classrooms, offices, theaters, and concert halls for example), their acoustic properties actually determine how well they are able to fulfill their purpose.
Accurate and reliable test data is essential for those engaged in the design and construction of these spaces: a powerful omnidirectional sound source is vital 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 new Outline Globe Source Radiator (GSR) is a high-power omnidirectional sound source that offers unique performance and features for such applications, delivering a perfectly spherical and physically robust design that provides a homogeneous sound field in extremely compact dimensions, featuring specially shaped loudspeaker membranes to assure perfect isotropic directivity. As a truly spherical device, it eliminates diffractions, reflections and other anomalies caused by non-spherical radiators, which can compromise the accuracy of data measurement.
GSR’s usefulness extends also 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. These include 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. The Outline GSR solution is also fully ISO10140, ISO354, ISO3382 and DIN 52210 compliant.
Crafted out of top quality void-free birch ply and finished in super-tough polyurea coating technology, the robust spherical enclosure features an Ergal aluminum inner structure that houses twelve 5” neodymium-magnet transducers and is the first such device to include a bass reflex design to extend its frequency response. The GSR's custom-designed transducers feature high power-to-size ratio Neodymium magnets with additional ferrofluid cooling, thus increasing thermal power dissipation and making it possible for the GSR to handle up to double the power of conventional loudspeakers.
Rated for 1000W RMS (4000W peak) total power handling, the Outline GSR is capable of producing a maximum SPL of over 130.3 dB, a figure far in advance of any other comparable product presently available and a remarkable output from a spherical loudspeaker only 31cm in diameter.
The GSR is also available as a part of a complete user-ready kit, comprising a GSR, NG01 Noise Generator, Outline’s L3000 DSP compact amplifier plus all the necessary cables, a transportation bag and a set of mounting accessories, providing a portable setup ready for immediate deployment. The Outline NG01 noise generator can be controlled with a radio remote control and delivers White or Pink noise with XLR balanced outputs. 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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