Type 4292 Light - OmniPower Sound Source

For most building acoustics measurements, the sound source must radiate sound evenly in all directions to give reproducible and reliable results; therefore, the relevant building acoustics measurements standards (ISO 140 and ISO3382) require the use of an omnidirectional sound source.

OmniPower Omnidirectional Sound Source Type 4292 Light uses a cluster of 12 loudspeakers in a dodecahedral configuration that radiates sound evenly with a spherical distribution. All 12 speakers are connected in a series-parallel network to ensure both in phase operation and an impedance that matches the power amplifier.

Key features
Key features of the Type 4292 Light OmniPower sound source:

• Lightweight, 8kg assembly making it easy to transport to the measurement location
• Powerful, 122dB re 1pW, ideal for measurements in large spaces or for assessing the sound insulation of high performing walls and floors
• Powerful at low frequency, delivering peak power where it’s needed most 100Hz – 200Hz ensuring good measurements in high background conditions

Lightweight
The entire assembly weighs a mere 8 kg which for field based measurements often undertaken in multi-storey buildings with stairs and lifts to negotiate, is a welcome light weight alternative to traditional loudspeaker units. The light weight, innovative design is achieved using Neodymium magnets in the 12 speaker clusters rather than the more traditional and heavier ferrous magnet loudspeaker units.

High power at low frequencies
Background noise is the enemy of good building acoustics measurements particularly at low frequencies where traffic noise and air conditioning systems are some of the main culprits i.e. between 100Hz and 200Hz. The OmniPower sound source is designed to deliver its peak performance in this very same range delivering maximum power where it’s needed most. See below.

 Frequency response for 1/3-octave sound power levels for OmniPower Type 4292Light using Power Amplifier Type 2734 and its internal pink noise generator.

Powered by Power Amplifier Type 2734-A or 2734-B, the Sound Source can deliver a maximum sound power of 122 dB re 1 pW (100 – 3150Hz). The high power output of Type 4292 light makes it ideal for sound insulation measurements or reverberation time measurements

The OmniPower is also fitted with a convenient lifting handle that does not measurably interfere with the sound field as is supplied with a telescopic speaker stand for positioning the sound source at varying heights. For more information, please contact your local sales representative.

Building acoustics measurement system consisting of 4292 Light Sound Source, Type 2734 power amplifier and Type 2270 Hand-held analyzer with wireless transmitter.