Representation of the frequency ranges of a traditional DPOAE and the nontraditional DPOAEs and the frequency range of for fixed .
The levels (in dB SPL) of the and DPOAEs are plotted as a function of DPOAE frequency for (right) and also (left). The levels of are SPL (left) and SPL (right) and the level of is SPL. When , the is maximum at about , so . When , again is maximum at about , so now . The noise floors are plotted without symbols and are generally at SPL or less (except at low frequencies).
For constant , , and the dependence of DPOAE level on the levels, and , of the primary tones is displayed for (top left), (top right), (bottom left), and (bottom right).
The levels (in dB SPL) of the , , and DPOAEs are plotted as a function of DPOAE frequency for (right) and (left). Also, the DPOAE is shown for . The level of is SPL and the levels of are (left) and 65 (right) dB SPL. Two of the three noise floors are plotted without symbols. All of the noise floors were essentially the same and at or below SPL over the frequency range of interest.
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