title: Estimation of pressure-particle velocity impedance measurement uncertainty using the Monte Carlo method.
abstract: The pressure-particle velocity (PU) impedance measurement technique is an experimental method used to measure the surface impedance and the absorption coefficient of acoustic samples in situ or under free-field conditions. In this paper, the measurement uncertainty of the the absorption coefficient determined using the PU technique is explored applying the Monte Carlo method. It is shown that because of the uncertainty, it is particularly difficult to measure samples with low absorption and that difficulties associated with the localization of the acoustic centers of the sound source and the PU sensor affect the quality of the measurement roughly to the same extent as the errors in the transfer function between pressure and particle velocity do.
authors.affiliation: Laboratório de Vibrações e Acústica, Departamento de Engenharia Mecânica, Universidade Federal de Santa Catarina, Campus Trindade, Florianópolis, Santa Catarina 88040-900, Brazil. ericbacustica@gmail.com
authors.forename: Eric
authors.initials: E
authors.lastname: Brandão
authors.forename: Rodolfo C C
authors.initials: RC
authors.lastname: Flesch
authors.forename: Arcanjo
authors.initials: A
authors.lastname: Lenzi
authors.forename: Carlos A
authors.initials: CA
authors.lastname: Flesch
mesh_terms: D000042:Absorption; D000162:Acoustics / Q000295:instrumentation; D003198:Computer Simulation; D004867:Equipment Design; D015233:Models, Statistical; D009010:Monte Carlo Method; D009038:Motion; D016062:Porosity; D011312:Pressure; D013016:Sound; D013499:Surface Properties; D013997:Time Factors; D014160:Transducers, Pressure; D035501:Uncertainty