Journal: International Archives of Otorhinolaryngology

Article Title: Effect of Modulated Masking on Cortical Auditory Evoked Potential in Normal Hearing Individuals: A Systematic Review and Meta-analysis

doi: 10.1055/s-0044-1782629

Figure Lengend Snippet: Description of methodological parameters, results, and conclusion of the included studies

Article Snippet: Androulidakis and Jones (2006) , Virtual oscilloscope (Pico Technology, St Neots Cambridgeshire, United Kingdom). , Pure tone of 200 ms, 61 dB SPL, and frequency of 1 kHz. , a) Unmodulated random noise (80 dB SPL; broadband: 0–20 kHz). b) Random noise modulated in amplitude by a square wave of 17.5 Hz. , Electromagnetic earphone (Sanyo, PH230, Moriguchi, Osaka, Japan) in both ears. , Six silver electrodes in Fpz, Fz, Cz, and Pz C3 and C4 (impedance < 5 kΩ). Window (700ms); filter (1 Hz and 200 Hz). , Amplitudes and latency of the N1 and P2 components. , The N1 and P2 components were statistically higher and earlier in the modulated noise condition compared with the unmodulated noise condition. The latencies were strongly determined by whether the tones coincided with the rise or fall of the modulated masking envelope (instant noise level was low). , Masking release is correlated with waves N1 and P2. Furthermore, it is possible that the responses of these components to modulated and unmodulated masking can assess auditory temporal resolution processes, which are a crucial part of complex sound perception..

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