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  • Title: [Investigation on the frequency specificity of the auditory brainstem response to tone burst in three different conditions].
    Author: Wang S, Chen X, Ye Yf, Pan Sf.
    Journal: Lin Chuang Er Bi Yan Hou Ke Za Zhi; 2002 Jul; 16(7):330-3. PubMed ID: 15510729.
    Abstract:
    OBJECTIVE: This study investigated and compared the effects of tone burst in three different conditions (linear-gated tone burst, linear-gated tone burst in broadband noise masking and Blackman-gated tone burst) on the frequency specificity of ABR. METHOD: The latencies of ABR wave V were recorded respectively on sixteen normal-hearing adults using 1, 2 and 4 kHz tone bursts in three types of stimuli at different intensities. RESULT & CONCLUSION: 1. Three types of tone bursts may evoke similar frequency-specific ABR when stimulus intensity was lower than 70 dB nHL for 1 kHz and any intensity for 2, 4 kHz. At the high-intensity(> or = 70 dB nHL) for lower frequency (1 kHz), however, linear-gated tone burst had poor frequency specificity due to the increased effects of spectral splatter. To improve the frequency specificity, linear-gated tone burst should be mixed with masking noise or using Blackman-gated tone burst directly. 2. Both linear-gated tone burst in broadband noise masking and Blackman-gated tone burst of 1 kHz, 2 kHz and 4 kHz at any intensity can produce frequency-specific ABR, but response amplitudes were smaller for the broadband noise masking condition than for the Blackman-gated one. Therefore the Blackman-gated tone burst is prefered.
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