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Decibels

db. Decibels. "A" Weighting. Attenuates the lower frequencies to approximate the response of the human ear, which is most sensitive to frequencies between 3000 and 4000 Hz. WCB Reference Standard 110 db per ½ hour maximum allowable 105 db 1 hour. "B" Weighting.

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Decibels

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  1. db • Decibels

  2. "A" Weighting • Attenuates the lower frequencies to approximate the response of the human ear, which is most sensitive to frequencies between 3000 and 4000 Hz. • WCB Reference Standard • 110 db per ½ hour maximum allowable • 105 db 1 hour

  3. "B" Weighting • Gives decibel readings of combined high- and middle-frequency signals. Lower frequencies are rolled off. Use in conjunction with A weighting to isolate sounds that are causing a problem.

  4. "C" Weighting • Reads all frequencies the same but gives a better response to higher frequencies than A or B weighting. Use to pinpoint problems when A or B weighted scale readings are very high. • Full Audio Spectrum

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