Abstract
The nature of acoustic reflex amplitude ARA growth at 1KHz and 2kHz was investigated in normal hearing and cochlear disordered subjects subdivided into Meniere's Disease and heterogeneous pathology groups. Statistical and graphical analyses revealed significant inter-group variation ARA growth rate. The normal and Meniere's groups behave similarly, while the heterogeneous group demonstrated a faster ARA growth rate. The differential sensitivity of various measurement methods was examined. Explanations were put forward to account for variability in ARA data amongst cochlear disorder subjects. It was concluded that the clinical sensitivity of ARA measurement was questionable.
Highlights
The nature of acoustic reflex amplitude (ARA) growth at IKHz and 2KHz was investigated in normal hearing and cochlear disordered subjects subdivided into Meniere's Disease and heterogeneous pathology groups
It is possible that this discrepancy between present and other research findings is a function of the small sample size and considerable variability in function configurations, that characterised this study
— 1 mm = 0.04 mV. mV scores used in data analysis were restricted to those at hearing levels (HL) and sensation levels (SL) at which a reflex response was common to all test ears
Summary
The nature of acoustic reflex amplitude (ARA) growth at IKHz and 2KHz was investigated in normal hearing and cochlear disordered subjects subdivided into Meniere's Disease and heterogeneous pathology groups. Ooreenkomste tussen die normale en die Meniere se groepe is aangetref terwyl daar 'n toename in die ARA-groeitempo van die heterogene groep was. Inter-study variability in the description of normal ARA growth could have resulted from a nonstandardised basis of amplitude measurement; sensation level (SL) versus hearing level (HL) measurement methods. Uliel (1980) investigated an ascending-descending ARA function in normal and cochlear disordered subjects, by HL measurement. Cochlear disordered subjects with concomitant loudness recruitment demonstrated a faster than normal
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