Real-time analyzers or octave-band analyzers are special sound level meters that divide noise into its frequency components. Electronic filter circuits are used to divide the sound or noise into individual frequency bands. Most octave-band filter sets provide filters with the following center frequencies: 31.5, 63, 125, 250, 500, 1,000, 2,000, 4,000, 8,000, and 16,000 Hertz (Hz). For a more detailed analysis, the spectrum is sometimes measured in one-third octave bands.
Real-time analyzers or octave-band analyzers are used to:
-Help determine the adequacy of various types of frequency-dependant noise controls.
-Select hearing protectors because they can measure the amount of attenuation (how much a sound is weakened) offered by the protectors in select octave bands.
-Analyze the frequency content of noise.
They are also valuable for the calibration of audiometers and to determine the adequacy of various types of noise control. The special signature of any given noise can be obtained by taking sound level meter readings at each of the center frequency bands. The results may indicate octave-bands that contain the majority of the total sound power being radiated.
If you need assistance selecting or configuring an octave band analyzer for your sound or noise measurement application please contact us at toll free 1.866.363.6634 or email us at sales@calright.com.
