Sound Power Level Limits

Verified from official sources
Part 3Article 42Version 1Effective -Verified 22 August 2026

In plain language

Your drone must comply with legal noise limits. Do not modify the propulsion system in a way that increases noise levels.

Requirement as structured

Unless it is a fixed-wing UA, a class C2 UAS must have a guaranteed A-weighted sound power level not exceeding the levels established in Part 15.

Original regulatory text

unless it is a fixed-wing UA, have a guaranteed A-weighted sound power level L WA determined as per Part 13 not exceeding the levels established in Part 15;

Applies when

class marking
C2
regulatory category
Open