Redesign of the Hannover Coupler: Optimized Vibration Transfer from Floating Mass Transducer to Round Window
Mean SFP displacement amplitudes in response to RW stimulation by the HCv2/FMT at nominal 1 FMT input: (a) as a function of frequency and (b) as a function of applied static RW load. (c) Average SFP displacement amplitudes in response to RW stimulation of selected frequencies from (b) (blue) with SD (error bars). Gross averages for these speech relevant frequencies (0.5, 1, 2, and 4 kHz) are shown for the previous design (gray circles, ) and the new HCv2 (black circles, ). (d) Mean SFP displacement response amplitudes (red line) with min–max variations (error bars, except 125 Hz where only one value with sufficient SNR was available) in response to RW stimulation by the HCv2/FMT at 15 mN static RW load. For comparison SFP responses to RW stimulation from a study of Arnold et al.  are displayed as a blue line and corresponding min–max variations are indicated by the blue-shaded area.
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