Neamaalkassis Hakam, Boubenec Yves, Fiebach Christian, Muralikrishnan R, Tavano Alessandro
Department of Cognitive Psychology, Max Planck Institute for Empirical Aesthetics, Grüneburgweg 14, Frankfurt a. M. 63122, Germany.
Département d'Études Cognitives, École Normale Supérieure, PSL Research University, CNRS, 29 rue d'Ulm, Paris 75005, France.
R Soc Open Sci. 2025 Feb 19;12(2):241081. doi: 10.1098/rsos.241081. eCollection 2025 Feb.
Own actions send a corollary discharge (CD) signal, that is a copy of the planned motor programme, to sensory-specific brain areas to suppress the anticipated sensory response, providing a neural basis for the sense of self. When we speak, the sensory consequences of the fundamental frequency ( ) of our own voice, generated by vocal fold vibrations, are suppressed. However, due to bone/air conduction filtering effects, the we self-generate is measurably different from the we subjectively perceive as defining our own voice. Using an auditory change deafness paradigm, we parametrically tested the sensitivity to auditory change in the frequency neighbourhoods of objective and subjective own voice pitches and found that participants experience change deafness for both to a similar extent, relative to a control pitch condition. We conclude that when we listen attentively, we are likely to filter out small pitch changes in the vicinity of our own objective and subjective voice , possibly as a long-term consequence of speaking-induced suppression mechanisms integrated with individual, perceptual bodily priors.
自身动作会向特定感觉脑区发送一个伴随放电（CD）信号，即计划运动程序的副本，以抑制预期的感觉反应，为自我意识提供神经基础。当我们说话时，由声带振动产生的自身声音基频的感觉后果会被抑制。然而，由于骨/空气传导滤波效应，我们自我产生的基频与我们主观上认为定义自己声音的基频在可测量上有所不同。使用听觉变化失聪范式，我们对客观和主观自身声音音高频率邻域内的听觉变化敏感性进行了参数测试，发现相对于对照音高条件，参与者对两者的变化失聪程度相似。我们得出结论，当我们专心聆听时，可能会过滤掉自身客观和主观声音附近的小音高变化，这可能是与个体感知身体先验相结合的言语诱导抑制机制的长期结果。
