title: Effect of stimulus and number of sweeps on the neonate auditory brainstem response.
abstract: OBJECTIVE
  The purpose of this study was to compare auditory brainstem responses (ABRs) to chirp and click stimuli in neonates at a low level typically used in newborn hearing screening. It was hypothesized that ABR wave V amplitudes would be larger and would be obtained with fewer number of stimulus presentations with chirps.
  
  
  METHODS
  Twenty-three neonates participated. ABRs were obtained to CE-Chirp and click stimuli presented at 30 dB nHL with sweeps increasing exponentially in number (i.e., 116, 232, 464, 928, and 1856).
  
  
  RESULTS
  ABRs to the CE-Chirps appeared before and with greater propensity at lower sweep numbers compared to clicks. All neonates had ABRs to CE-Chirps at 464 sweeps compared to 1856 sweeps with the click stimulus. ABRs to CE-Chirps evidenced significantly larger Wave V amplitudes and significantly longer wave V latencies versus clicks.
  
  
  CONCLUSIONS
  Evoking ABRs in neonates to chirps could significantly improve response amplitudes and reduce test time.
authors: Department of Communication Sciences and Disorders, East Carolina University, Greenville, North Carolina, USA.
authors: Andrew
authors: A
authors: Stuart
authors: Kensi M
authors: KM
authors: Cobb
mesh_terms: D000161:Acoustic Stimulation / Q000379:methods*; D016057:Evoked Potentials, Auditory, Brain Stem / Q000502:physiology*; D005260:Female; D034381:Hearing Loss / Q000175:diagnosis*; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D015997:Neonatal Screening