Detection of 1/1 and 1/3 octave filters for sound and vibration analysis

1 Scope 1.1 This standard specifies the performance specifications and testing methods for analog, sampled data, and digital bandpass filters composed of filter banks or spectral analyzers. For all filters with a given bandwidth, the passband range determined by the relative attenuation characteristics of the filter is a constant percentage of the center smoothness. Instruments that meet the requirements of this standard can include any number of bandpass filters covering any desired rate range. 1.2 This standard applies to three levels of filters. The performance requirements for level 0, level 1, and level 2 increase with the increase of the level. 1.3 A bandpass filter that meets the performance requirements of this standard can be a part of various measurement systems or a complete component of a specific instrument, and can work in real-time. 1.4 Instruments that meet the requirements of this standard. For various signals, such as time-varying. Intermittent and steady-state signals; Broadband and discrete rates, as well as signals with long and short durations, can provide information on the spectrum filtered by the frequency band. Filters with different implementation methods that meet the requirements of this standard. Different results may be given in applications involving transient signals. 2 Normative References: The clauses in the following documents become clauses of this standard through reference in this standard. For dated reference documents, all subsequent amendments (excluding corrected content) or revisions are not applicable to this standard. Therefore, all parties who have reached agreements based on this standard are encouraged to study whether new versions of these documents can be used. For undated references, the latest version of * applies to this standard. GB/T 3240-1982 Common frequencies in acoustic measurements (neq ISO 266:1975) GB/T 3785 1-2010 Electroacoustic Sound Level Meters - Part 1: Specifications (IEC 61672-1: 2002, IDT) GB 9254-2008 Radio Disturbance Limits and Measurement Methods for Information Technology Equipment (CISPR 22: 2006. IDT) GB/T 17626.2-2006 Electromagnetic Compatibility Testing and Measurement Techniques - Electrostatic Discharge Immunity Test (IEC61000-4-2:2001, IDT) GB/T 17626.3-2006 Electromagnetic Compatibility Testing and Measurement Techniques - Radio Frequency Electromagnetic Field Radiation Immunity Test (IEC 61000-4-3:2002, IDT) GB/T 1799.1-1999 General Standard for Electromagnetic Compatibility - Immunity Testing in Residential, Commercial, and Light Industrial Environments - Cidt IEC 61000-6-1; 1997) GB/T 17799.2-2003 Electromagnetic Compatibility General Standard - Immunity Testing for Industrial Environments (IEC 61000-6-2: 1999. IDT) GB/T 17799 3-2001 General electromagnetic compatibility standard - Emission standard for residential, commercial and light industrial environments - Cidt IEC 61000-6-3; 1996) SI/T 10444-1993 Electroacoustic Terminology CISPR 16-1; 1999 Radio frequency interference and immunity measurement instruments and methods - Part 1: Radio frequency interference and immunity measurement instruments OIML: 1978 Legal metrology vocabulary - Basic terminology