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Figure 3: Representative example of a map for a normal hearing non - noise exposed subject. Panels (a) Distortion product otoacoustic emission (DPOAE) level map at L1,L2 = 65,55 dB SPL; (b) DPOAE signal - to - noise ratio (SNR) map at L1,L2 = 65,55 dB SPL; (c) DPOAE level map at L1,L2 = 75,75 dB SPL; (d) DPOAE SNR map at L1,L2 = 75,75 dB SPL. Audiometric thresholds were less than 5 dBHL 250 - 8000 Hz including the inter - octaves of 3000 and 6000 Hz

Figure 3: Representative example of a map for a normal hearing non - noise exposed subject. Panels (a) Distortion product otoacoustic emission (DPOAE) level map at L1,L2 = 65,55 dB SPL; (b) DPOAE signal - to - noise ratio (SNR) map at L1,L2 = 65,55 dB SPL; (c) DPOAE level map at L1,L2 = 75,75 dB SPL; (d) DPOAE SNR map at L1,L2 = 75,75 dB SPL. Audiometric thresholds were less than 5 dBHL 250 - 8000 Hz including the inter - octaves of 3000 and 6000 Hz