1902 - 120th Place SE #202

Everett, Washington, 98208

Phone: (425) 337-9472 or toll free (888) 300-5443; Fax: (425) 337-9578


AIRCRAFT NOISE CERTIFICATION 

TESTING OVERVIEW

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Certifying the noise for an aircraft involves evaluating the Effective Perceived Noise Level (EPNL) at given

reference points for Takeoff, Sideline and Landing. The noise limits are based on the takeoff gross weight and 

number of engines.

 

Noise Certification Requirements:

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