The effect of humidity on the stability of pressure - Velocity sensors: A measurement method of absorption characteristics of building materials by using ensemble averaging

Abstract

To examine humidity influence on stability of pu-sensors, we applied calibration and the ensemble averaged surface normal impedance method (EA-Method) under controlled relative humidity (φ=35-60%) in a reverberation room. Experiments revealed that calibration results (i.e. correction values) changed as humidity levels varied. A comparison of standard deviations on absorption coefficients generated increasing value as the humidity difference between calibration and measurement increased (Δφ=0-25%). Repeatability was demonstrated by using two identical pu-sensors in four set measurements. Furthermore, a partial correlation test demonstrated the dominance of humidity over other environmental factors influencing sensor sensitivity.

Access to Document

Other files and links

• Link to publication in Scopus
• Open Access Version Available

Fingerprint