title: Experimental verification of a two-sensor acoustic intensity measurement in lossy ducts.
abstract: Two-sensor method proposed by Fusco et al. ["Two-sensor power measurements in lossy ducts," J. Acoust. Soc. Am. 91, 2229-2235 (1992)] is a novel technique that determines acoustic intensity of a gas column in a wide duct from measurements of pressure based on the boundary layer approximation. For further development of this method, its validity is experimentally tested through comparison with the direct method measuring the pressure and the velocity simultaneously, and its formulation is modified to include the narrow duct range where the duct radius is smaller than the viscous boundary layer thickness of the gas. It is shown that the modified two-sensor method enables quick and accurate evaluation of the acoustic intensity seamlessly from narrow to wide duct ranges.
authors.affiliation: Department of Mechanical Systems and Design, Tohoku University, Sendai 980-0013, Japan.
authors.forename: Tetsushi
authors.initials: T
authors.lastname: Biwa
authors.forename: Yusuke
authors.initials: Y
authors.lastname: Tashiro
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Nomura
authors.forename: Yuki
authors.initials: Y
authors.lastname: Ueda
authors.forename: Taichi
authors.initials: T
authors.lastname: Yazaki
mesh_terms: D000162:Acoustics / Q000295:instrumentation; D004867:Equipment Design; D005740:Gases / Q000737:chemistry*; D008962:Models, Theoretical; D009038:Motion; D009991:Oscillometry; D011312:Pressure; D015203:Reproducibility of Results; D013016:Sound; D013997:Time Factors; D014160:Transducers, Pressure; D014783:Viscosity
chemical_list: D005740:Gases