Qref, Omni-directional power reference source

  • Precision omni-directionallity semi-free-field, horizontal and vertical in the 50 to 5000 Hz third octave bands.
  • Small and light weight at 0.8 kg only.
  • Extremely stable and high output sound power at Lw 97 dB for 100 Hz upwards.
  • Can be used in calibrated fixed output level mode and in a free-signal mode using the power proportional output ref. signal.
  • Supplied as a set with a dedicated QamR amplifier.
  • Each unit delivered with an accredited calibration (ISO 9626)
  • Unique signal flexibility; broadband random, sine, etc.

Applications

  • Identification of equivalent sound power of machinery on-site.
  • SEA (statistical energy analysis) type of measurements of rooms, halls, structures and other acoustically coupled systems.
  • Other general airborne excitation applications.

Specifications (Qref and QamR)

According to standard:
ISO 6926, ISO 3647
High accuracy freq. range:
100-5000 Hz (third octave)
Potential frequency range:
50-16000 Hz (third octave)
Ambient temperature range:
20 to 45 degrees Celsius
Omni-directionality:
+-2.5 dB from 50-5600 Hz
Maximum sound power level:
97 dB Lw, 2 minutes**
90 dB Lw, 10 minutes**
Powering and conditioning:
Infra-Qsources QamR amplifier only
Dimensions:
107 mm diameter,160 mm height
Weight:
0.8 Kg (and 2.4 kg amplifier)
*These specifications may be adapted, if necessary to improve the quality of the
product.
** When driven by QamR with non-equalized broadband pink noise 50- 5000 Hz.

Data Sheet & Product Information