Establishment of Sound Impedance Tube Facility at CSIR-National Physical Laboratory, New Delhi, India
摘要
The paper discusses about the Sound Impedance Tube facility for evaluation of sound absorption characteristics of acoustical materials at CSIR-National Physical Laboratory, New Delhi, the National Metrology Institute (NMI) of India. The facility has been recently revived and brought under the Quality Management System as per ISO 17025:2017 and traceable to the national standards to the Sound Pressure Level. The paper reports methodology and measurement uncertainty in the evaluation of the sound absorption characteristics of acoustical materials as per ISO 10534-2: 1998. The revived facility traceable to the national standards of sound pressure level is instrumental in design and development of building acoustic materials for noise management and control.