Subject: Neonate Tymps From: Navid Shahnaz <nshahnaz@xxxxxxxx> Date: Sat, 15 Jul 2006 13:26:17 -0700Hi Megha Currently, only few norms are available and most of them are for compensated Y at 1 kHz. Descriptive statistics were only provided for tympanograms obtained at a 1000 Hz probe tone frequency as this was the frequency at which most infant tympanograms showed a discernable and well defined single peak. You could refer to Margolis, Bass-Ringdahl, Hanks, Holte, & Zapala (2003). Tympanometry in newborn infants - 1 kHz norms. Journal of American Academy of Audiology, Sep; 14(7):383-92. With regard to developmental changes there are even fewer studies. You could refer to: Holte, L., Margolis, R. H. & Cavanaugh, R. M. (1991). Developmental changes in multifrequency tympanometry. Audiology, 30, 1-24. Keefe, D. H., & Levi, E. (1996). Maturation of the middle and external ears: acoustic power-based responses and reflectance tympanometry. Ear & Hearing 17, 361-73. Keefe, D.H., Gorga, M.P., Neely, S.T., Zhao, F., Vohr, B.R. (2003). Ear-canal acoustic admittance and reflectance measurements in human neonates. II. Predictions of middle-ear in dysfunction and sensorineural hearing loss. Journal of Acoustical Society of America, 113(1), 407-22. We are in process of submitting our paper this week to JAAA that has norms for NICU and well babies. Best Navid Navid Shahnaz, Ph.D Assistant Professor School of Audiology & Speech Sciences Faculty of Medicine 5804 Fairview Ave. Vancouver, B.C. V6t 1Z3 Canada Tel. 604-822-5953 Fax. 604-822-6569 E-mail: nshahnaz@xxxxxxxx Website: http://www.audiospeech.ubc.ca/school/faculty/navid/ ---------- Original Message ---------------------------------- From: megha jp <meghajp11@xxxxxxxx> Reply-To: megha jp <meghajp11@xxxxxxxx> Date: Fri, 14 Jul 2006 14:23:10 +0100 >I would like to have information on > Developmental changes in Multi frequency tympanometry in children from 0day to 4 yrs of age or any information regarding > Chages in susceptance and conductance across age, or > Normative established for delta B and delta theta and delta G across age. thank you. > > >--------------------------------- > Find out what India is talking about on Yahoo! Answers India. > So, what’s NEW about the NEW Yahoo! Messenger? Find out. > ________________________________________________________________ Sent via the WebMail system at audiospeech.ubc.ca --- [This E-mail scanned for viruses by Declude Virus]