Resumen de Measurement uncertainty in airborne sound insulation and single-number quantities using sound pressure and sound intensity approached
N. Garg, L. Gandhi, A. Kumar, P.K. Saini
The paper presents an analytical approach in calculating the measurement uncertainty in airborne sound insulation single-number quantity (SNQ). The work ascertains the magnitude of uncertainty difference for single-number quantities considering the sound pressure approach, sound intensity approach and a combined approach utilizing sound intensity method for low frequency measurements (50 to 160 Hz) and sound pressure for the frequency range of 200 Hz to 5 kHz. The work presents two case studies: one utilizing the standard deviation of reproducibility recommended in ISO 12999-1, ISO 15186-1 and ISO 15186-3 standards and the other utilizing the standard deviation of reproducibility reported by Dijckmans and Vermeir in 2013. The analytical results suggest that a combined approach i.e. sound intensity in range 50 to 160 Hz as per ISO 15186-3 and sound pressure in range 200 Hz to 5 kHz is most suitable for reducing the measurement uncertainty in single number quantities in the frequency range 50 Hz to 5 kHz.
