# 14 C.F.R. § 150.9 (2026): Designation of noise systems

> Federal · Regulations · In force

URL: https://www.frixlaw.com/law-library/statutes/CFR_T14_P150_S150_9

## Section

- **Citation:** 14 C.F.R. § 150.9 (2026)
- **Heading:** Designation of noise systems
- **Jurisdiction:** Federal
- **Kind:** Regulations
- **Status:** In force
- **Text as of:** August 14, 2026
- **Source:** Compiled text
- **Location:** Title 14 CFR: Aeronautics and Space / Chapter I: FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION / Part 150: AIRPORT NOISE COMPATIBILITY PLANNING / Subpart A: General Provisions / § 150.9: § 150.9   Designation of noise systems.

## Text

For purposes of this part, the following designations apply:
(a) The noise at an airport and surrounding areas covered by a noise exposure map must be measured in A-weighted sound pressure level (L
A
) in units of decibels (dBA) in accordance with the specifications and methods prescribed under appendix A of this part.
(b) The exposure of individuals to noise resulting from the operation of an airport must be established in terms of yearly day-night average sound level (YDNL) calculated in accordance with the specifications and methods prescribed under appendix A of this part.
(c) Uses of computer models to create noise contours must be in accordance with the criteria prescribed under appendix A of this part.

## Nearby sections

- [14 C.F.R. § 150.1 (2026) § 150.1   Scope and purpose.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P150_S150_1.md)
- [14 C.F.R. § 150.3 (2026) § 150.3   Applicability.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P150_S150_3.md)
- [14 C.F.R. § 150.5 (2026) § 150.5   Limitations of this part.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P150_S150_5.md)
- [14 C.F.R. § 150.7 (2026) § 150.7   Definitions.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P150_S150_7.md)
- [14 C.F.R. § 150.9 (2026) § 150.9   Designation of noise systems.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P150_S150_9.md)
- [14 C.F.R. § 150.11 (2026) § 150.11   Identification of land uses.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P150_S150_11.md)
- [14 C.F.R. § 150.13 (2026) § 150.13   Incorporations by reference.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P150_S150_13.md)

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Source: Frix Law Library, https://www.frixlaw.com/law-library/statutes/CFR_T14_P150_S150_9. Check the current official text before relying on it. Not legal advice.