14 CFR § 161.9 - Designation of noise description methods.

---
identifier: "/us/cfr/t14/s161.9"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "14 CFR § 161.9 - Designation of noise description methods."
title_number: 14
title_name: "Aeronautics and Space"
section_number: "161.9"
section_name: "Designation of noise description methods."
chapter_name: "FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION"
subchapter_number: "I"
subchapter_name: "AIRPORTS"
part_number: "161"
part_name: "NOTICE AND APPROVAL OF AIRPORT NOISE AND ACCESS RESTRICTIONS"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "49 U.S.C. 106(g), 47523-47527, 47533."
regulatory_source: "Docket 26432, 56 FR 48698, Sept. 25, 1991, unless otherwise noted."
cfr_part: "161"
---


# 161.9 Designation of noise description methods.

For purposes of this part, the following requirements apply:

(a) The sound level at an airport and surrounding areas, and the exposure of individuals to noise resulting from operations at an airport, must be established in accordance with the specifications and methods prescribed under appendix A of 14 CFR part 150; and

(b) Use of computer models to create noise contours must be in accordance with the criteria prescribed under appendix A of 14 CFR part 150.