Miniature Volume Source - Qind2

The Qsources Qind2 miniature volume source has been developed to perform highly repeatable, low-mid frequency acoustic excitation in an absolute minimum space. Two small, but long stroke, small pistons are combined to create a small low frequency capable monopole.

The patented Qsources ring radiator solution is used to create a close approximation of a omni-directionality in its working frequency range.

An internal sensor provides a real-time volume displacement proportional signal. (equivalent to volume velocity or volume acceleration) This allows engineers to measure accurate acoustic- and vibro-acoustic tranfer functions for reciprocity, modal analysis, model correlation, sound power insertion, etc applications.

*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 sound pressure levels.