GB/Z 3222.3-2026 Acoustics—Description, measurement and assessment of environmental noise—Part 3:Objective method for the measurement of prominence of impulsive sounds and for adjustment of L Aeq

Scope

This method objectively classifies sound sources by measuring the prominence of pulse sounds, with the aim of correlating with public responses. This method of measuring the prominence of pulse sounds is applicable to sound sources that are not identified as gunshots or high-energy pulse sounds, typically generating correction values of 0.0 dB to 9.0 dB. These correction values are designed to distinguish between regular pulse sounds or strong pulse sound sources, and are applicable to the adverse corrections specified in ISO 1996-1. However, these correction values can also be used directly, as is done in NT ACOU 112 [2] and BS 4142 [3]. ISO 1996-2 provides additional guidance for conducting these measurements.
This method aims to address the typical pulse sounds that are not classified in ISO 1996-1. Examples of sound sources include compressed air discharge, crushing processing, cargo transportation, forklifts with clicking forks, skateboard ramps, industrial shearing, gas emissions, impact demolition tools, power riveting, and so on, the list is endless.
This method is not applicable to gunshots. Although measuring the prominence may yield relevant results, studies show that responses to these sound sources are also influenced by factors beyond the scope of this document. Additionally, this method is not applicable to high-energy pulse sound sources explicitly specified in ISO 1996-1.
Note: This method is not applicable to occupational hearing loss, which is beyond the scope of this document.

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