Bruel & Kjaer 2209 Impulse Precision Sound Level Meter

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The Bruel & Kjaer 2209 Impulse Precision Sound Level Meter complies with all existing standards for impulse and precision sound level meters. The Bruel & Kjaer 2209 is equipped with: an individually calibrated condenser microphone; an internal reference voltage for calibration; "Lin.", "A", "B", "C", and "D" weighting networks; impulse and peak detectors with "Hold" circuits, as well as "Fast", "Slow" and "Impulse" meter responses; overload warning lamps; and an AC and DC output for connection to recorders, etc. The 2209 can handle crest factors as high as 40, and has a selectable low-frequency cutoff. External filters can be directly attached, and a wide range of accessories are available.

The Bruel & Kjaer 2209 can also be connected to an accelerometer for the measurement of vibration.  An interchangable meter scale and a range of attenuator scales facilitate the direct reading of vibration (as well as sound or voltage) over a wide range.
Optional 1613 Octave Filter Set:
  • 11 Octave Filters
  • Center Frequencies: 31.5 Hz to 31.5 kHz
  • Connects directly to 2209 Sound Level Meter