fi äänitaso
sv ljudnivå; vägd ljudtrycksnivå
en weighted sound pressure level; sound level
de Schallpegel m; frequenzbewerteter Schalldruckpegel m; bewerteter Schalldruckpegel m
fr niveau de pression acoustique pondérée m
definition
logarithm of the ratio of a given sound pressure to the reference sound pressure of 20 μPa, the sound pressure being obtained with a standard frequency weighting and with a standard exponential time weighting. Sound level in decibels is twenty times the logarithm to the base ten of that ratio
note
Standard frequency weightings A, В and C and standard exponential time weightings fast (F), slow (S) and impulse (I) are given in IEC 651 (1979): Sound level meters.
Time and frequency weightings employed should be specified, but if not stated explicitly, fast (F) exponential time weighting and A-frequency weighting are understood.
Luokitus: | | Acoustics and electroacoustics |
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