Abstract
Adaptation seems to be a very important feature of auditory processing. It provides the conservation and the enhancement of small changes of the sound envelope in the enormous dynamic range. In our previous studies of the midbrain auditory units of the frog we used sinusoidally modulated tones to analyse the influence of the long-term adaptation upon the encoding of the small intensity changes. Using the 10% amplitude-modulated (AM) high-intensity (30-60 dB above threshold) tones we calculated the modulation depth of the firing rate in successive periods after the tone onset. The results obtained in many units with a sustained response were the following. During the first 100-200 ms of the 10% AM tone duration the synchronisation of firing with the modulation waveform was not evident. Then, continuously the synchronisation appears. To the end of the first second the modulation depth of the firing rate was rather prominent. It continued to increase till to the 8-10th sec of the tone presentation (Bibikov, 1990; Bibikov and Grubnik, 1991; Bibikov and Nizamov 1996).
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References
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© 1997 Springer Science+Business Media New York
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Bibikov, N.G., Grubnik, O.N. (1997). Responses to Intensity Increments and Decrements in Different Types of Midbrain Auditory Units of the Frog. In: Syka, J. (eds) Acoustical Signal Processing in the Central Auditory System. Springer, Boston, MA. https://doi.org/10.1007/978-1-4419-8712-9_25
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DOI: https://doi.org/10.1007/978-1-4419-8712-9_25
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