Reactivating the Acoustic Stapedius Muscle Reflex by Adding a Second Tone

Abstract

During continuous tone stimulation a gradual decrease of the provoked impedance change in the normal human ear occurs. The reactivation from this reflex fatigability when superimposing a second tone is studied by means of an electroacoustic impedance bridge. The assumption that the reactivation implies a frequency difference between the two tones is not confirmed in our investigations.