Alper KÖYCÜ, Hatice Seyra ERBEK, Ahmet Fevzi PARLAK

Normative auditory brainstem response values to chirp stimulus in adults with normal hearing

Objectives: This study aimed to establish normative values for our clinic by determining Wave V latency and amplitudes with chirpstimulus in adults with normal hearing.Patients and Methods: A total of 62 (31 males, 31 females; range, 18-60 years) individuals who had no complaints related to hearingand normal otoscopic examinations participated in the study. The participants were divided into two groups, of those age 18-39 yearsand 40-60 years. In the auditory brainstem response (ABR) recording parameters, CE-Chirp stimuli were used in repeated frequencyrarefaction polarity at the rate of 33.1/sec. For the recording window, a setting of 15 milliseconds was selected and a frequency rangeof 50-1500 Hz for the recording filter. At each level of intensity, 1500 samples were collected and averaged.Results: At 90 dB nHL, Wave I could not be obtained in 17 subjects and Wave III in 14 subjects. In Wave V values obtained from all ofthe subjects, the highest amplitude (0.41±0.12 microvolt) was determined as 70 dB nHL and the lowest latency (4.62±0.34 millisecond)90 dB nHL. In the evaluation according to gender, the Wave V latencies were more delayed in males than in females. In the age-groupevaluation, Wave V latencies were more delayed in the 40-60 years age group than in the younger age group.Conclusion: With CE-Chirp ABR over 70 dB nHL, as there was upward spread of excitation, the wave formations obtained weredistorted and amplitudes decreased. Therefore, the determination of the threshold at sound levels of 70 dB nHL and below wasconsidered appropriate for use as a diagnostic method.

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1. Purdy SC, Abbas PJ. ABR thresholds to tonebursts gated with Blackman and linear windows in adults with high-frequency sensorineural hearing loss. Ear Hear 2002;23:358-68.
2. Gorga MP, Johnson TA, Kaminski JR, Beauchaine KL, Garner CA, Neely ST. Using a combination of clickand tone burst-evoked auditory brain stem response measurements to estimate pure-tone thresholds. Ear Hear 2006;27:60-74.
3. Dau T, Wegner O, Mellert V, Kollmeier B. Auditory brainstem responses with optimized chirp signals compensating basilar-membrane dispersion. J Acoust Soc Am 2000;107:1530-40.
4. Wegner O, Dau T. Frequency specificity of chirpevoked auditory brainstem responses. J Acoust Soc Am 2002;111:1318-29.
5. Bell SL, Allen R, Lutman ME. An investigation of the use of band-limited chirp stimuli to obtain the auditory brainstem response. Int J Audiol 2002;41:271-8.
6. Hatanaka T, Shuto H, Yasuhara A, Kobayashi Y. Ipsilateral and contralateral recordings of auditory brainstem responses to monaural stimulation. Pediatr Neurol 1988;4:354-7.
7. Gorga MP, Kaminski JR, Beauchaine KL, Jesteadt W, Neely ST. Auditory brainstem responses from children three months to three years of age: normal patterns of response. II. J Speech Hear Res 1989;32:281-8.
8. Sininger YS. Auditory brain stem response for objective measures of hearing. Ear Hear 1993;14:23-30.
9. Neely ST, Norton SJ, Gorga MP, Jesteadt W. Latency of auditory brain-stem responses and otoacoustic emissions using tone-burst stimuli. J Acoust Soc Am 1988;83:652-6.
10. Elberling C, Don M, Cebulla M, Stürzebecher E. Auditory steady-state responses to chirp stimuli based on cochlear traveling wave delay. J Acoust Soc Am 2007;122:2772-85.
11. Elberling C, Don M. A direct approach for the design of chirp stimuli used for the recording of auditory brainstem responses. J Acoust Soc Am 2010;128:2955-64.
12. Pushpalatha ZV, Konadath S. Auditory brainstem responses for click and CE-chirp stimuli in individuals with and without occupational noise exposure. Noise Health 2016;18:260-5.
13. Kristensen SG, Elberling C. Auditory brainstem responses to level-specific chirps in normal-hearing adults. J Am Acad Audiol 2012;23:712-21.
14. Yoshiko K, Fujita Y. Auditory brainstem responses by click stimuli via an earphone--comparison with a headphone. Rinsho Byori 1994;42:1287-93. [Abstract]
15. Costa Neto TT, Ito YI, Fukuda Y, Gananca MM, Caovilla HH. Effects of gender and head size on the auditory brainstem response. Rev Laryngol Otol Rhinol (Bord) 1991;112:17-9.
16. Muş N, Karamanyol M, Dündar A. Investigation of sex effect on hearing function in human by using electric response audiometry. Turkiye Klinikleri J Med Res 1989;7:53-7.
17. Picton TW, Stapells DR, Campbell KB. Auditory evoked potentials from the human cochlea and brainstem. J Otolaryngol Suppl 1981;9:1-41.
18. Lofti Y, Abdollah FZ. Age and gender effects on auditory brain stem response. Iranian Rehabilitation Journal 2012;10:16.
19. Elberling C, Don M. Auditory brainstem responses to a chirp stimulus designed from derived-band latencies in normal-hearing subjects. J Acoust Soc Am 2008;124:3022-37.
20. Elberling C, Callø J, Don M. Evaluating auditory brainstem responses to different chirp stimuli at three levels of stimulation. J Acoust Soc Am 2010;128:215-23.
21. Rodrigues I, Lewis R. Comparison of click and CE-chirp stimuli on Brainstem Auditory Evoked Potential recording. Rev Soc Bras Fonoaudiol 2012;17:412-6.