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'n Klankversterker se uitset is gespesifiseer as 71.0 W. Bereken die maksimum hardheid, β wat dit op 'n afstand 5.79 meter vanaf 'n luidspreker kan veroorsaak. Die drempel van hoorbaarheid is 10-12 Wm-2.
An amplifier is rated at 71.0 W. Calculate the maximum loudness, β in decibels you would expect at a point 5.79 m from a loudspeaker connected to the amplifier. The threshold of hearing is 10-12 Wm-2.