GB/T 25516-2010 (English Version) PDF

Standard No.: GB/T 25516-2010
Language: Chinese, Available in English version
Release Date: 2010
Published By: General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Latest: GB/T 25516-2010

Scope: This standard specifies the following test methods: the frequency band insertion loss of the duct muffler under the state of air flow and no air flow; the frequency band sound power level of the regenerative air flow noise of the muffler; the total pressure loss of the duct muffler when there is air flow passing through; Frequency band sound transmission loss. This standard specifies the laboratory measurement method at ambient temperature. The on-site measurement method of the muffler is described in detail in GB/T 19512. It should be noted that the laboratory test results obtained according to this standard are not necessarily consistent with the test results obtained on site (installation). Different sound fields and flow fields will lead to different results. For example, the pressure loss measured in the laboratory will be lower than that in the field. However, test results from different laboratories can be compared. This standard applies to all types of mufflers including ventilation and air conditioning systems, gas intake and exhaust systems, and other similar systems. Other passive ventilation devices, such as elbows, duct ends, and T-connectors, can also be tested according to this standard. This standard does not apply to resistant mufflers for motor vehicles.

GB/T 25516-2010 Referenced Document

GB/T 16404.3-2006 Acoustics.Determination of sound power levels of noise sources using sound intensity.Part 3: Precision method for measurement by scanning
GB/T 2624.1 Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full Part 1: General principles and requirements
GB/T 3768-1996 Acoustics--Determination of sound power levels of noise sources using sound pressure--Survey method using an enveloping measurement surface over a reflecting plane
GB/T 6881.1-2002 Acoustics--Determination of sound power levels of noise sources using sound pressure--Precision methods for reverberation rooms
IEC 60651:2001 Sound Level Meters (Edition 1.2; Edition 1:1979 Consolidated with Amendments 1:1993 and 2:2000; Replaced by IEC 61672-1:2002 and IEC 61672-2: 2003)
IEC 60804:2000 Integrating-averaging sound level meters
IEC 60942:1997 Electroacoustics - Sound calibrators
IEC 61260 Amendment 1 - Electroacoustics - Octave-band and fractional-octave-band filters
ISO 5167-1 Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full — Part 1: General principles and requirements*， 2022-06-16 Update
ISO 5221 Air distribution and air diffusion; Rules to methods of measuring air flow rate in an air handling duct

2010 GB/T 25516-2010 Acoustics.Laboratory measurement produres for ducted silencers and air.Terminal units loss,flow noise and total pressure loss