Qom mid frequency dodecahedron sound source

Omni-directional mid frequency sound source

Dodecahedron sound source for building acoustics or any other measurement that require good omni-directionality. The Qom has a robust glass fibre reinforced single piece housing and a moderate weight with its high efficiency 6 inch drivers. The smooth spectrum which does not require equalisation.

Features:

Omni-directionality well within

the ISO 3382 and ISO 140 standards

High efficiency and sound power levels

up to 120 dB with pink noise

Full functional and low cost solution

Low impedance, suitable for off-grid

measurements with the QamB amplifier

Specifications*:

Application frequency range:         50-8000 Hz
Omni-directionality:                      well within ISO 3382 and ISO 140
Maximum sound power level:        120 dB Lw during 2 minutes**
                                                  115 dB Lw during 15 minutes**
Output level stability:                    better than 0.5 dB over 2 minutes at 120 dB
Weight:                                       15 kg
Sphere dimension:                        42 cm diameter
Power requirement:                       around 200 Watt RMS to 4 Ohm***

* These specifications may be adapted if necessary to improve the quality of the product.
**When driven with QamB generated low crest-factor pink noise at 25 Celsius ambient temperature.
*** For maximum performance a dedicated light weight power amplifier is available from Infra-Qsources.

Applications:

-  On-site airborne sound isolation
-  Reverberation and absorption
-  Hall/Room acoustics
-  Small up to very large buildings
-  Road-railway infrastructure  
-  Reference sound power testing
-  Barrier performance
-  Building element performance   
-  General airborne excitation

Recommended set:

- Qom sound source                          (15.0 kg)
- Qam measurement amplifier/cables    (2.3 kg)
- Light weight tripod (fixed height)         (1.5 kg)