How to Cite
V, B. (1). Measurements of acoustic impedance in Indians. Journal of All India Institute of Speech and Hearing, 10(1), 117. Retrieved from http://203.129.241.91/jaiish/index.php/aiish/article/view/695
Abstract
Impedance measures-tympanometry, acoustic impedance, and acoustic reflex threshold were determined on 136 Indian subjects (191 ears) using electro-acoustic bridge (Madsen ZO 70). The subjects included normal and pathological, varying in age from 6-56 years. Sex and age differences were observed with regard to static compliance and acoustic impedance. Any conclusion rerarding the norms for acoustic impedance cannot be drawn as there is overlapping of pathogical and normal ears with regard to acoustic impedance. The normals obtained a wider range of 682-5840 acoustic ohms. Varying of air pressure in the ear canal had significant effect on acoustic reflex .threshold.
References
Berenek, 1967 'Acoustic Measurements' 7th Printing, John Wiley & Sons Inc.
Burke, K.R. et a/., 1970 'Middle ear Impedance measurements', J. Speech Hear. Res. 13, pp
317-325.
Feldman, A.S., 1963 'Impedance measurement at the ear drum as an aid to diagnosis.' J. Speech
Hear. Res. 1~, pp 315-327.
~ Jerger, 1970. 'Clinical exp~rience with Impedance Aud'iometry, Arch. of Otolaryng 92, pp. 311-324
Jerger, 1972, ·Studies in impedance audiometry,' Arch. of Otolaryng 96, 1972.
~ 'Lid~n, et al , 1970. 'Tym,panometry', Acta Otolaryng Supple 263.
"Madsen Model ZO 70, CElectro-acoustic impedance bridge-Applications and instructions for use.'
.ZWislocki, J.J., 19,68, 'On acoustic' research and its clinical applications.' Acta. Otolaryng 65,
' .. pp. 86-96.
Zwislocki J.J. and Feldman, A. S., 1970. 'Acoustic impedance of pathological ears.' ASHA
monograph 15.
Burke, K.R. et a/., 1970 'Middle ear Impedance measurements', J. Speech Hear. Res. 13, pp
317-325.
Feldman, A.S., 1963 'Impedance measurement at the ear drum as an aid to diagnosis.' J. Speech
Hear. Res. 1~, pp 315-327.
~ Jerger, 1970. 'Clinical exp~rience with Impedance Aud'iometry, Arch. of Otolaryng 92, pp. 311-324
Jerger, 1972, ·Studies in impedance audiometry,' Arch. of Otolaryng 96, 1972.
~ 'Lid~n, et al , 1970. 'Tym,panometry', Acta Otolaryng Supple 263.
"Madsen Model ZO 70, CElectro-acoustic impedance bridge-Applications and instructions for use.'
.ZWislocki, J.J., 19,68, 'On acoustic' research and its clinical applications.' Acta. Otolaryng 65,
' .. pp. 86-96.
Zwislocki J.J. and Feldman, A. S., 1970. 'Acoustic impedance of pathological ears.' ASHA
monograph 15.