ISO 5305:2024 PDF

Noise measurements for UAS (unmanned aircraft systems)

Название (английский):

ISO 5305:2024

Noise measurements for UAS (unmanned aircraft systems)

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 49
Дата публикации:: 29 января 2024 г.
Издание:: ISO IS 5305 edition 1 version 1
ICS:: 49.020

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Описание (английский):

This document specifies methods for recording the time history of instantaneous sound pressure in several positions around rotor powered unmanned aircraft systems (UAS) with a maximum take-off mass (MTOM) of less than 150 kg in accordance with ISO 21895[9]. The UAS can be either electrically powered or fuel-powered. It is not applicable to the tilt-rotor or tilt-wing UAS. It does not account for the UAS noise certification or regulation This document can also be applied to measure the sound pressure from a UAS with either multiple rotors or a single rotor. This document specifies: a) recommendations and requirements for three different test facilities for the noise measurements of various categories of multirotor-powered UAS: — requirements and recommendations of UAS noise tests in anechoic chambers (Clause 7); — requirements and recommendations of UAS noise tests in anechoic wind tunnels (Clause 8); — requirements and recommendations of UAS noise tests in outdoor environments (Clause 9); b) requirements and recommendations for the configuration of noise measurement for multirotor-powered UAS in hover, vertical take-off and landing, and horizontal cruise; c) recommendations for the test configuration and procedures to minimize the influence of meteorological effects.

Технические детали

Технический комитет: ISO/TC 20/SC 16 - Unmanned aircraft systems
SKU: ISO 5305:2024

Abstract

Overview

ISO 5305:2024 - "Noise measurements for UAS (unmanned aircraft systems)" defines standardized methods to record the time history of instantaneous sound pressure around rotor‑powered UAS with a maximum take‑off mass (MTOM) of less than 150 kg. The standard applies to electrically or fuel‑powered single‑ and multi‑rotor UAS, excluding tilt‑rotor and tilt‑wing types. ISO 5305:2024 specifies test environments (anechoic chambers, anechoic wind tunnels, outdoor sites) and measurement configurations for hover, vertical take‑off/landing (VTOL), and horizontal cruise. Note: it provides measurement methodology but does not itself set noise certification or regulatory limits.

Key Topics and Requirements

Measurement scope: Time‑history recording of instantaneous sound pressure at multiple observer positions around the UAS.
Test facilities:
- Anechoic chamber tests (Clause 7): chamber size, qualification, microphone arrangements (4‑microphone and multi‑microphone approaches).
- Anechoic wind tunnel tests (Clause 8): wind‑tunnel requirements, refraction corrections, microphone clearance.
- Outdoor tests (Clause 9): site selection, microphone layout, meteorological constraints and measurement corrections.
Flight configurations: Defined procedures for hover, yaw, take‑off/landing, and cruise noise measurements.
Instrumentation and calibration: Requirements for sensors, data acquisition and calibration to ensure accurate sound pressure capture.
Environmental control: Recommendations to minimize meteorological effects (wind, temperature gradients, background noise) and to meet acoustic far‑field conditions.
Position/speed control: Requirements for UAS positional accuracy and speed during tests to ensure repeatability.
Uncertainty and reporting: Guidance on uncertainty sources, evaluation and mandatory reporting elements (test methods, selected noise metrics, UAS data, environment, results).

Applications and Users

ISO 5305:2024 is intended for professionals conducting standardized UAS noise measurements, including:

UAS manufacturers developing quieter vehicles or validating acoustic performance.
Acoustic test laboratories and research institutions performing controlled noise tests.
Urban planners and environmental consultants assessing community noise impacts from UAS operations.
Regulatory bodies and policymakers using measurement methods as a reference (the standard itself does not certify compliance).

Practical uses include product development, comparative noise testing of multirotor designs, operational noise assessments for urban/delivery UAS, and research into noise mitigation strategies.

Related Standards

ISO 21895 (referenced normative document) - used in conjunction with ISO 5305:2024 for MTOM and related classification guidance.

Keywords: UAS noise measurements, unmanned aircraft systems noise, anechoic chamber, anechoic wind tunnel, outdoor noise tests, sound pressure, multirotor UAS, noise measurement procedures.

Overview

Key Topics and Requirements

Measurement scope: Time‑history recording of instantaneous sound pressure at multiple observer positions around the UAS.
Test facilities:
- Anechoic chamber tests (Clause 7): chamber size, qualification, microphone arrangements (4‑microphone and multi‑microphone approaches).
- Anechoic wind tunnel tests (Clause 8): wind‑tunnel requirements, refraction corrections, microphone clearance.
- Outdoor tests (Clause 9): site selection, microphone layout, meteorological constraints and measurement corrections.
Flight configurations: Defined procedures for hover, yaw, take‑off/landing, and cruise noise measurements.
Instrumentation and calibration: Requirements for sensors, data acquisition and calibration to ensure accurate sound pressure capture.
Environmental control: Recommendations to minimize meteorological effects (wind, temperature gradients, background noise) and to meet acoustic far‑field conditions.
Position/speed control: Requirements for UAS positional accuracy and speed during tests to ensure repeatability.
Uncertainty and reporting: Guidance on uncertainty sources, evaluation and mandatory reporting elements (test methods, selected noise metrics, UAS data, environment, results).

Applications and Users

ISO 5305:2024 is intended for professionals conducting standardized UAS noise measurements, including:

UAS manufacturers developing quieter vehicles or validating acoustic performance.
Acoustic test laboratories and research institutions performing controlled noise tests.
Urban planners and environmental consultants assessing community noise impacts from UAS operations.
Regulatory bodies and policymakers using measurement methods as a reference (the standard itself does not certify compliance).

Practical uses include product development, comparative noise testing of multirotor designs, operational noise assessments for urban/delivery UAS, and research into noise mitigation strategies.

Related Standards

ISO 21895 (referenced normative document) - used in conjunction with ISO 5305:2024 for MTOM and related classification guidance.

Keywords: UAS noise measurements, unmanned aircraft systems noise, anechoic chamber, anechoic wind tunnel, outdoor noise tests, sound pressure, multirotor UAS, noise measurement procedures.

ISO 5305:2024 PDF

Технические детали

Abstract

Overview

Key Topics and Requirements

Applications and Users

Related Standards

Похожие стандарты

Abstract

Overview

Key Topics and Requirements

Applications and Users

Related Standards

Похожие стандарты

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