ISO 14509-1:2008 specifies the conditions for obtaining reproducible and comparable measurement results of the maximum sound pressure level of airborne sound generated during the passage of powered recreational craft of up to 24 m length of hull, including inboards, stern drives, personal watercraft (PWC) and outboard
ISO 14509 is an international standard that specifies procedures for measuring the airborne sound emitted by powered recreational craft, like boats, allowing for consistent and comparable results when assessing the noise level of such vessels; essentially, it defines how to measure the sound produced by a recreational boat to ensure accurate comparisons between different models.
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