Fig. 6.

Compression on the BM (left) versus hyper-compression in the hotspot region (right). a, b Vibration magnitude as a function of frequency, normalized to stapes motion. Sound intensity is indicated in the key, with arrows indicating amounts of compression observed at CF (25 kHz) between 20 and 73 dB SPL. c, d Below-CF input–output functions for different frequencies, based on the tuning curves of panels a, b. Dashed lines illustrate linear growth for reference. e, f Near-CF input–output functions. Data were obtained from a single preparation (the same one as in Fig. 5, CF 25 kHz), and acquisition from the two locations was interleaved