GMW GMW14480 PDF

Note: Nothing in the specification supersedes applicable laws and regulations unless specific exemption has been obtained.

Note: In the event of conflict between the English and domestic language, the English language shall take precedence.

Purpose.

Define the method of quantifying sound power emitted by the generator when measured at a component level. The product of this procedure will be a set of sound power measures in dB magnitude (ref 10^-12 W).

Foreword.

The sound power of a component is one of the factors affecting airborne noise and correlates to noise levels in the passenger compartment.

Applicability.

This test procedure is appropriate for all motor driven electro-mechanical devices used in vehicles to supply the electrical system with electric energy and to recharge the battery.