Measuring distortion product otoacoustic emissions using continuously sweeping primaries.

摘要: Distortion product otoacoustic emission (DPOAE) level from normal hearing individuals can vary by as much 30dB with small frequency changes (a phenomenon known DPOAE fine structure). This structure is hypothesized to stem the interaction of components two different regions cochlea (the nonlinear generator region and reflection component DP region). An efficient procedure separate these would improve clinical research utility permitting evaluation regions. In this paper, procedures for evaluating are compared: generated fixed-frequency primaries versus continuously sweeping primaries. The sweep data analyzed a least squares fit filter. Sweep rates greater than 8s per octave permit rapid cochlear structure. A higher rate 2s provided without Under conditions, longer latency falls outside range Consequently, obtained tones be used either get more estimates or obtain uncontaminated energy region.