“…As noted earlier, past studies indicate that tympanometry has good predictive accuracy in determining whether or not a child is suffering from middle-ear disease (Beery et al, 1975;Bluestone, Beery, & Paradise, 1973;Cantekin et al, 1980a: Haughton, 1977Orchik, Dunn, & McNutt, 1978;Renvall, Jarlstedt, & Holmquist, 1980). Tympanometric measures used in past screening protocols have included peak compensated static acoustic susceptance (B tm ), peak compensated static acoustic admittance (Y tm ), tympanogram width (TW), equivalent ear canal volume (V ea ), tympanogram peak pressure (TPP), tympanometric gradient, and tympanogram shape (ASHA, 1979(ASHA, , 1990Brooks, 1978b;Holmberg et al, 1986;Liden & Renvall, 1978;Paradise et al, 1976;Roush & Tait, 1985).…”