Acoustic-reflex growth functions (ARGFs) were obtained from 20 normal-hearing listeners,
Contralateral acoustic reflexes (ARs) were elicited with pure tones of 2000 Hz. The
magnitude of changes in static compliant susceptance (BA) and conductance (GA) were
monitored with probe-tone frequencies of 226 Hz, 678 Hz and 1000 Hz. ARGFs were obtained
with six combinations of probe-tone frequency/admittance component: 226 Hz BA, 226
Hz GA, 678 Hz BA, 678 Hz GA, 1000 Hz BA, and 1000 Hz GA. Peak conductance (GA) and
susceptance (BA) ARs were largest within the 678 Hz GA and 1000 Hz BAARGFs, respectively.
Among high-frequency probe tones, the patterns of AR growth were larger and less variable
for the 678 Hz GA ARGF and the 1000 Hz BA ARGF as determined by the magnitude of their
linear (b1) and quadratic (b2) polynomial coefficients and the value of their squared
correlation coefficients (R2).
Key Words
Acoustic reflex - acoustic-reflex growth function - probe-tone frequency - acoustic
compliant susceptance - acoustic conductance - acoustic admittance - acoustic compliant
reactance - acoustic resistance - acoustic impedance
