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. Hence the relevant standards for the measurement of building acoustics (ISO 140 and ISO 3382) require that an omnidirectional sound source be used.

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

The whole assembly weighs 14 kg and is fitted with a convenient lifting handle which does not measurably interfere with the sound field. OmniPower can utilise the combined output power of both channels of the Power Amplifier Type 2716, and deliver a sound power of 122 dB re 1 pW. OmniPower's high power output makes it ideal for sound insulation measurements.