4292 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 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. The entire assembly weighs less than 14 kg and is fitted with a convenient lifting handle that does not measurably interfere with the sound field.

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 makes it ideal for sound insulation measurements.