The study focusses on two major aspects: measurement methodology and uncertainty in the realization and dissemination of unit watt in airborne sound and consideration in legal sound regulations for various noise sources. Although sound power level is the fundamental unit invariant of distance from the source, yet there is no direct method for its measurement. An National Metrology Institute (NMI) perspective for the realization, dissemination and application of acoustical quantities: sound pressure and sound power level for strengthening the measurement traceability chain in India and formulation of legal noise limits and regulations of various noise sources is described. The low frequency limitations may yield different results using different methods, which thus necessitates the use of a harmonized approach in realizing the sound power parameter for improving the traceability for the unit watt in airborne sound. The use of sound power level and sound pressure level for noise labeling of appliances and other noise sources in India is recommended.

该研究集中在两个主要方面：测量方法和在机载声音中实现和传播单位瓦数的不确定性，以及对各种噪声源的合法声音法规的考虑。尽管声功率级是到声源的距离的基本单位不变，但尚无直接的测量方法。美国国家计量学会（NMI）的实现，传播和应用声量的观点：描述了声压和声功率级，用于加强印度的测量可追溯性链，并制定了合法的噪声限值和各种噪声源的法规。使用不同的方法，低频限制可能会产生不同的结果，因此，这需要在实现声功率参数时使用协调的方法，以改善空气中声音中单位瓦特的可追溯性。建议在印度将声功率级和声压级用于电器和其他噪声源的噪声标签。