| 摘要 |
<p>A system for testing the auditory response of the human ear by measuring the linear and nonlinear power-based responses thereof uses a small probe assembly (50) containing a sound source (24, 52, 54) and microphone (30, 52, 56) inserted into the ear. The linear responses, or transfer functions, include reflectance, admittance and impedance. A calibration procedure is based upon measured pressure responses in one or more calibration waveguides (60), and upon a model of the transfer function of each of the calibration waveguides. The nonlinear responses are established by measuring the above transfer functions at different levels of the acoustic stimulus. By delivering changes in static pressure applied to the ear via an additional probe tube (68, 70) in the probe assembly (50), the system is able to measure the dependence on static pressure of any of these linear and nonlinear power-based functions.</p> |
