OTHER
ISO 266:1997
ISO 266:1997 is an International Standard that specifies preferred frequencies for acoustical measurements. These frequencies are based on the R10 series of preferred numbers in ISO 3, with 1000 Hz as the reference frequency. The standard aims to provide a common basis for c
📄 Document
Title: APPLICATION FORM OF ISO 266:1997
📜 Document Instructions:
Please fill the application form and upload required documents online for ISO Certification.
