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sound level "sound level" means ten times the common logarithm of the ratio of the square of the measured A-weighted sound pressure to the square of the standard reference pressure of 20 micropascals;
PU(A) 244/1987 - ENVIRONMENTAL QUALITY (MOTOR VEHICLE NOISE) REGULATIONS, 1987
2. Interpretation. |
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sound level "sound level" means ten times the common logarithm of the ratio of the square of the measured A-weighted sound pressure to the square of the standard reference pressure of 20 micropascals;
PU(A) 244/1987 - ENVIRONMENTAL QUALITY (MOTOR VEHICLE NOISE) REGULATIONS 1987
2. Interpretation |