3.10  band sound pressure level. Sound pressure level for sound contained within a restricted frequency band. Unit, decibel (dB); abbreviation, BSPL; symbol, Lpb.

Annotation              A band may be identified by its nominal lower and upper band-edge frequencies, or by its nominal midband frequency and nominal bandwidth. The nominal width of the band may be indicated by a prefatory modifier, e.g., octave-band sound pressure level, one-third octave-band sound pressure level, or 50-Hz band level at 400 Hz.

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