Free-field low-frequency sound from natural or man-made sources elicits SOAE bouncing

Evidence

Indeed many of those 48 % SOAEs that had been initially identified in the closed-meatus measurements, but could no longer be detected in the open meatus, appeared directly after the LF exposure for a short time period, before falling again below the noise floor (Fig. 3d ). These data clearly show that Bouncing of SOAEs can indeed be elicited by free-field exposure to LF sound sources of natural or anthropogenic origin. — Dijk, Pim van, Physiology, Psychoacoustics and…, 3711