Comparing auditory brainstem responses (ABRs) to toneburst and narrow band CE-chirp® in young infants

Further comparisons of ABR response amplitudes, test time, and estimation of hearing threshold using frequency-specific chirp and tone pip stimuli in newborns: Findings at 0.5 and 2 kHz

“…These results agree with those obtained by Rodrigues et al (2013) when testing a group of infants (mean age of 2.6 months) at 20 and 40 dBnHL. The range of levels used in the current study was 10 -50 dBnHL.…”

“…It was proposed in our previous study that once the optimal levels have been exceeded the chirp amplitudes will be closer to those of the tone pips and the advantage of using chirps will not be as apparent. This effect has been found by Rodrigues et al (2013) and is a similar effect to that seen in adult studies (Elberling & Don, 2010).…”

“…At 0.5 kHz there was a signifi cantly higher level of residual noise for the tone pips compared to the chirps, which could have produced a larger than expected observed amplitude for the tone pips. However, according to their paper, Rodrigues et al (2013) stopped their ABR averaging process when the estimated residual background noise was 40 nV and therefore tone pip and chirp waveforms had similar residual noise levels. It is therefore unlikely that the higher residual noise levels for the tone pips in the current study would be cause of the lower ratio.…”

“…The Fmp values (related to signal to noise ratio) were at least twice as large. Since that study, Rodrigues et al (2013) have tested a slightly older cohort of infants (average age 2.6 months). Their results supported our fi ndings of larger ABR amplitudes when using NB CE-Chirps at stimulus levels similar to those utilized in our study.…”

Comparison of Tone Burst, Click and Chirp Stimulation in Vestibular Evoked Myogenic Potential Testing in Healthy People

“…In ABR testing, the latency of the fifth wave is shorter compared with other types of stimuli. It is hypothesized that this occurs because stimulation at all frequencies results in shorter cochlear stimulation [6] . The P13 latency duration results in our study agree with those reported in literature [1][2][3] .…”