hvad er meningen med lwa og hvad er forholdet mellem lwa & db (a)?
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den nuværende europæiske standard hævder, at alle producenter = 2 kw ikke må overstige lwa95.

lwa95 svarer til 70 db (a) i en afstand af 7 meter.

vi kan sige, at db (a) på 7 meter = lwa – 25.
db (a) på 4 m = lwa – 20
db (a) på 0m = lwa – 0 = lwa

lydniveauet afhænger af motortype (benzin eller diesel), antallet af omdrejninger og kølesystemet. generelt kan vi sige, at:
* en benzin motor laver mindre støj end en dieselmotor
* 1500 rpm er mere rolig end 3000 rpm
* en vand-kølet motor er mere stille end luftkølet


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