GB/T 45726-2025 Active National standards

GB/T 45726-2025 Acoustics—Determination of high-frequency sound power levels emitted by machinery and equipment

Publish Date: 2025-05-30 Implement Date: 2025-12-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: GB/T 45726-2025

Standard Type: National standards

Standard Status: Active

is_force_gb: no

CCS Name: Acoustic metrology

ICS Name: \nNoise (related to humans)

Publish Date: 2025-05-30

Implement Date: 2025-12-01

Pages: 24 pages

Scope

This document describes four methods for measuring the high-frequency noise sound power level emitted by machinery and equipment within the frequency range of the octave band centered at 16 kHz, including frequencies of 11.2 kHz to 22.4 kHz. These methods are supplementary to those described in ISO 3741 and ISO 3744. The first three methods are based on reverberation chamber technology, and the fourth method uses a free field above a reflective surface.
The test conditions for the installation and operation of the equipment described in this document are the same as those specified in ISO 3741 and ISO 3744.