Qohm72, ​Extreme omni-directional sound source

  • High sound pressure levels for large site testing, and still single person portable. This source with a weight of 19.4 kg is capable of producing 140 dB Lw pink noise.
  • The use of 72 drivers, 4 inch, allows high precision omnidirectionallity up to 12.5 KHz, far better than dodecahderon sources and well within the ISO standard requirements. 

Applications

  • Large site airborne isolation and reverberation testing
  • High background noise site testing
  • Road- and Railway-infrastructure and barrier testing
  • Other general airborne excitation applications 

Specifications

  • Frequency range: 
  • Omni-directionality: ​ ​
​
  • Sound power level:
 

  • Output level stability:
 
  • Dimension, weight: 
  • Power requirement: 
47-16000 Hz third octaves
​+-1 dB from 100-4000 Hz
​+- 3 dB from 5000-12500 Hz

​140 dB Lw, 2 minutes**
​132 dB Lw, 15 minutes**

​better than 0.5 dB, during 10 minutes at 132 dB**

​​26 cm diameter, 3.1+-0.1 Kg.
​800 Watt RMS to 4 Ohm***
*These specifications may be adapted if necessary to improve the quality of the product.
​**When driven with Qam/QamS generated low crest-factor pink noise at 22 Celsius ambient temperature or lower. 

Data Sheet & Product Information