Rotary wafer switches (low current rating). Part 3 : Rotary wafer switches with two-hole mounting.

This document serves as a technical amendment to an established international standard concerning the measurement of sound pressure and related acoustic parameters. Issued by a global body dedicated to harmonizing electrical and electronic engineering practices, it addresses specific updates and modifications required for the original publication. The content focuses on refining technical requirements and clarifying test procedures to ensure consistency across different regions and manufacturers. It outlines necessary adjustments to measurement methodologies, equipment specifications, and environmental conditions to maintain accuracy in acoustic evaluations. By providing these amendments, the text ensures that existing standards remain relevant and effective in evolving technological contexts. The revision process involved detailed review by international experts to incorporate new findings and address practical challenges encountered in field applications. This supplementary material works in conjunction with the base standard, offering a cohesive framework for compliance without altering the fundamental principles of the original document. It is designed for engineers, manufacturers, and regulatory bodies involved in acoustic testing and product certification to ensure uniform application of technical criteria worldwide.