Ew. Abel et al., Audio-frequency characteristics of multilayer piezoelectric crystal actuator for use in hearing implant, ELECTR LETT, 36(6), 2000, pp. 494-495
A multilayer piezoelectric actuator has been evaluated for use in a hearing
implant. Its Frequency response was flat up to 20kHz. Initial in-vitro tri
als gave stapes displacement From stimulation at 3.5V RMS, which is equival
ent to that from acoustic stimulation at 90dB SPL below 1kHz, increasing to
120dB at 8kHz. This performance meets accepted clinical specifications.