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P444.60
Engine speed (S values), reference sound levels and permissible sound levels of stationary road vehicles ― Code of practice
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This Botswana Standard gives the following information regarding a road vehicle: a) the reference sound level (see 3.2), if supplied by the motor vehicle manufacturer; b)the stationary sound level limit (see 3.3); and c)the S value (see 3.4).NOTE 1 This Botswana Standard is intended to be used in conjunction with BOS 121. NOTE 2 This Botswana Standard provides up-to-date information for law enforcement officers, to facilitate noise measurements in accordance with the requirements of BOS 121.