title: Acoustic reflectometry for an in vitro model of a human upper airway using sinusoidal wave packets and the Ware-Aki algorithm.
abstract: Acoustic reflectometry is often used for estimating the cross-sectional area of a cylindrical cavity when used in combination with an acoustic pulse. The objective of this research is to sweep a spectral bandwidth from 50 Hz to 10 kHz at steps of 50 Hz, with Gaussian sinusoidal wave packets, and to apply the Ware-Aki algorithm. In practice, not only it is difficult to generate a broad spectral bandwidth, but also robust methods are required to compensate for attenuation in the propagating wave and to eliminate a DC offset component generated in its impulse response. This paper looks at using numerical techniques to compute the impulse response and estimate the cross-sectional area as a function of an increment in the frequency response. Preliminary results show that both simulated and reconstructed cross-sectional areas for an in vitro model of a human upper airway may be estimated with an appropriate resolution, suggesting that this method is suitable for such applications.
authors.affiliation: a Department of Electrical and Computer Engineering , The University of Texas at El Paso , El Paso , TX , USA.
authors.forename: E R
authors.initials: ER
authors.lastname: Vazquez
authors.forename: J H
authors.initials: JH
authors.lastname: Pierluissi
mesh_terms: D000162:Acoustics; D000465:Algorithms; D006801:Humans; D008954:Models, Biological; D012137:Respiratory System / Q000033:anatomy & histology*