• Franck Michel and Kristoffer Foldager Jørgensen.
• a Department of Otorhinolaryngology, Audiology Clinic , Aarhus University Hospital , Aarhus , Denmark.
• Int J Audiol. 2017 Feb 1; 56 (2): 99-105.

ObjectiveThe objective of this study is to compare air-conduction thresholds obtained with ASSR evoked by narrow band (NB) CE-chirps and ABR evoked by tone pips (tpABR) in infants with various degrees of hearing loss.DesignThresholds were measured at 500, 1000, 2000 and 4000 Hz. Data on each participant were collected at the same day.Study SampleSixty-seven infants aged 4 d to 22 months (median age = 96 days), resulting in 57, 52, 87 and 56 ears for 500, 1000, 2000 and 4000 Hz, respectively.ResultsStatistical analysis was performed for ears with hearing loss (HL) and showed a very strong correlation between tpABR and ASSR evoked by NB CE-chirps: 0.90 (n = 28), 0.90 (n = 28), 0.96 (n = 42) and 0.95 (n = 30) for 500, 1000, 2000 and 4000 Hz, respectively. At these frequencies, the mean difference between tpABR and ASSR was -3.6 dB (± 7.0), -5.2 dB (± 7.3), -3.9 dB (± 5.2) and -5.2 dB (± 4.7). Linear regression analysis indicated that the relationship was not influenced by the degree of hearing loss.ConclusionWe propose that dB nHL to dB eHL correction values for ASSR evoked by NB CE-chirps should be 5 dB lower than values used for tpABR.

29 keywords...

hide…