octave-band analyzer
McGraw-Hill Science & Technology Dictionary:
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octave-band analyzer
(′äk·tiv ¦band ′an·ə′līz·ər)
(engineering acoustics) A portable sound analyzer which amplifies a microphone signal, feeds it into one of several band-pass filters selected by a switch, and indicates the magnitude of sound in the corresponding frequency band on a logarithmic scale; all the bands except the highest and lowest span an octave in frequency. Abbreviated OBA.
McGraw-Hill Dictionary of Architecture & Construction:
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octave-band analyzer
An electronic instrument for measuring octave-band sound-pressure level; consists of a microphone, amplifier, electric filters, an indicator, and appropriate controls.
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