OKTAVA-111. Class 1 Sound Level Meter and Spectrum Analyzer

Easy-to-use - Convenient - Effective

OKTAVA-111 is a hand-held professional averaging class 1 sound level meter with 1/1- and 1/3-octave band filters.

The instrument provide for simultaneous measurement of running time averaged levels (RMS-1s), time weighted sound levels (F, S, I), equivalent sound pressure and sound exposure levels, peak sound levels, ansd sound pressure spectra


  • Sound level measurement - Gost 17187-2010 (IEC 61672-1), class 1
  • 1/1 and 1/3 octave band SPL measurements
  • Metal housing, durability
  • Automatic data storage
  • Non-volatile internal memory (4 GB)
  • Real time data transfer, remote control
  • Easy-to-setup: single mode of operation, all values are measured simultaneously
  • Easy-to-control: all data are grouped in just two windows
  • External 200 V mic polarization (prepolarized microphones allowed, as well), optional microphone extension cable
  • In-door community noise
  • Short-term noise monitoring outside buildings


Standards met

class 1 according to GOST 17187-2010 (IEC 61672-1) and GOST R 8.714 (IEC 61260)
A-weighted SPL linearity level range, dB 19 to 150*
C-weighted SPL linearity level range, dB 21 to 150*
Z-weighted SPL linearity level range, dB 24 to 150*
АU-weighted SPL linearity level range, dB 18 to 150*
Frequency weighting A, C, Z, AU
Time detectors S, F, I, Peak, Leq, RMS-1s

Octave-band filter set

31,5 Hz to 16 000 Hz

Third-octave-band filter set

25 Hz to 20 000 Hz


0,55 kg

Size (L×W×D)

-mic preamp attached

-w/o mic


305×85×35 mm

190×85×35 mm

Operational conditions:


- air temperature

minus 10°C to plus 50°C

- relative humidity

25 to 90%RH

- static pressure

85 to 108 kPa

* when equipped  with both 50 mV/Pa, and 14 mV/Pa microphones