BRELUXE05 — Omnidirectional Sound Source for Room Acoustics & Building Acoustics Measurements

The BRELUXE05 is a professional omnidirectional sound source (dodecahedron loudspeaker) for room acoustics and building acoustics measurements. It is compliant with ISO 3382 (reverberation time and room acoustic parameters) and ISO 16283 (field measurement of sound insulation in buildings) for use as the excitation source in standardized acoustic measurements. The omnidirectional radiation pattern of the dodecahedron speaker design ensures that the measurement environment is excited uniformly from all directions, meeting the requirements of these standards.

Building acoustics measurements per ISO 16283 and room acoustics measurements per ISO 3382 both require a sound source with omnidirectional radiation characteristics. A conventional loudspeaker or talkbox does not meet this requirement. The BRELUXE05's dodecahedron design provides the standardised omnidirectional excitation needed for measurements that must comply with these ISO standards.

Key Features

• Omnidirectional radiation pattern — meets ISO 3382 and ISO 16283 requirements for sound source directivity
• Dodecahedron loudspeaker design — 12 equal-sized panels for uniform sound radiation in all directions
• Suitable for reverberation time (RT60) measurement per ISO 3382-1 and ISO 3382-2
• Suitable for airborne sound insulation measurement per ISO 16283-1 and ISO 16283-2
• Sufficient output for most building acoustics applications
• Compatible with the i10, i9, and other measurement instruments

Measurement Applications

• Reverberation time (RT60, EDT, T20, T30) per ISO 3382-1 (auditoria, concert halls, churches) and ISO 3382-2 (ordinary rooms, offices, classrooms)
• Airborne sound insulation (DnT,w) per ISO 16283-1 — between rooms, party walls and floors in residential and commercial buildings
• Impact sound insulation (L'nT,w) per ISO 16283-2 — impact transmission through floors and ceilings
• Facade sound insulation per ISO 16283-3 — external noise from traffic, aircraft, and other outdoor sources
• Room acoustic characterization — clarity (C80), definition (D50), strength (G), and other acoustic parameters per ISO 3382-1

Building Acoustics Equipment Package

For a complete building acoustics measurement kit, combine the BRELUXE05 with: Bedrock Elite i10 or i9 (measurement instrument with RT60 and 1/3 octave capability), and optionally the Bedrock BIMK impulsive source kit for impulse response measurements. The i10 also supports direct ISO 16283 building acoustics calculation workflows.

Technical Notes on Omnidirectional Sound Source Setup

Correct positioning of the BRELUXE05 is critical for measurement validity. Per ISO 3382 and ISO 16283, the source centre should be at least 0.5 m from any room boundary and at least 1 m from the measurement microphone. The source and microphone must not face each other directly — avoid placing the microphone in the direct radiation axis of the source. For airborne sound insulation measurements, position the source in the source room to excite as many room modes as possible; a central position is generally avoided in favour of an eccentric position for better modal excitation in small rooms. The BRELUXE05 is powered by a mains adapter; ensure power is available at the source position or use an extension cable appropriate for the measurement area. Always warm up the source for at least two minutes before starting measurements to allow the driver to reach operating temperature and stabilise its output level.

Building Acoustics Applications  ·  RT60 Measurement Guide  ·  Request a Quote  ·  Compare Products