Tonfrequenzevozierte Potenziale: Optimierung von Reizpolarität, Reizrate, Reizdauer, Notched-Noise-Pegel und Ermittlung von Potenzialschwellen bei normalhörigen Probanden

摘要: Auditory evoked responses to tone-pips in notched-noise provide frequency specific estimations of thresholds. Most often, test frequencies are 0.5-4 kHz. Thresholds expected match with a high degree behavioral However, only few studies available containing data on stimulus and averaging parameters, especially at 0.25 In order find "optimal" parameters for widely used device (Nicolet Spirit Version 1.6), we designed five experiments polarity (Exp.I), sweep (Exp.II), duration (Exp.III), notched noise level (Exp.IV), threshold estimation (Exp.V). The also included low These were applied 29 healthy volunteers (n=29, aged 20-41 years normal hearing no history illness the ear). We found that alternating 43.5/s highest respect amplitudes (0.2-0.4 mV) correlations (0.49-0.91). A novel finding study was could be achieved if durations notched-noise-levels specifically adjusted (stimulus kHz: 4 ms, 0.5 Hz: 2 1-4 1 0.25-0.5 +10 dB, +/-0 dB). Deviations from thresholds did not exceed +/-5 dB 93% measures. results indicate auditory reliable estimations. Future required confirm deviations hard individuals.