High output monopole - Qoms2
The Qources Qoms2 presents the next level of accurate sound sources suitable for building acoustics measurements, and other application with a high sound power level requirement between 50 and 10000 Hz. The sound power level in all third octave bands is high enough to measure across huge cathedrals, large performance sites, huge industrial halls etc. It is not a source intended for building isolation measurements in concrete buildings. (such require a Qohm source)
The unique aspect of the Qoms2 source is the close approximation of a monopole over a very wide frequency range. This is possible using the Qsources patented ring radiator design and Qp4 driver technology. (See Qp4 video below)
This source allows highly accurate room impulse response measurements, Speech Transmission Index (STI), and cross space sound transfer, as well as standard reverberation time. The significant higher accuracy relative to dodecahedron sound sources allows engineers/consultants to analyze reflections and acoustic modes in greater detail. And this helps efficient optimization of theaters, schools or religious sites for speech and music.
The Qsources Qoms2 facilitates detailed comparison with numerical acoustic models, improving the models for material-acoustics interaction, and closer representation of diffraction and scattering effects. Crucial to advance numerical models of large space sound fields.
And of course it is small and very light weight!
Features
Extreme light weight, 1.7 Kg, allowing highest work efficiency
Compact tripod & soft carry case
Monopole approximation, far exceeding any dodecahedron
Vertical, or horizontal, positioning allow pure omni-directionality in one plane
Smooth omni-directionality approximation in the X-Z and Y-Z plane
In all directions the omni-directionality far exceeds the SO 3382/16283 requirements
Measurement techniques
Reverberation time
Room impulse responses
Insertion loss
Room transfer
Speech intelligibility
Facade isolation
Any measurement that requires a high sound power level
Main characteristics
Extreme lightweight 1.7 kg
Diameter 110 mm
Core frequency range: 100-10000 Hz*
Extended frequency range: 50-16000 Hz**
Broadband high output: 112 dB Lw***
***In combination with Qam-DSP
Availability
Depending on your region the Qoms2 source is marketed in cooperation with a selected local partner or available directly from Qsources
See more details of the Qsources Qoms2 omni-directionality
“The high accuracy of the Qohm2 speaker gives me confidence in my measurement results”
Attila Balazs Nagy, Reziduum Ltd., Hungary
*What is core frequency range for sound sources?
In the core frequency range a close approximation of omni-directionality and high output can be expected. Or in case of sources for ISO standard regulated requirements, like for building acoustics applications, the source will be well within the ISO requirements.
**What is extended frequency range for sound sources?
In enclosed spaces, a limited low frequency output from a source is not necessarily a limitation for measurement effectiveness or accuracy. Still in an open sound field, or very large enclosed space, the same source level may not generate sufficient sound pressure level at the lowest frequencies. Low frequency extension range is typically for smaller volume spaces like a car cabin, or an aircraft cabin.
The high frequency extended range is typically used when absolute omni-directionality is not needed or not feasible at the required pressure levels.
