论文标题
多诉音乐音调感知期间的神经巧合检测策略
Neural coincidence detection strategies during perception of multi-pitch musical tones
论文作者
论文摘要
在听力测试中，使用30张音乐声音录制了两种音调，除了两种带有无harmonic蓬松频谱的锣声音，判断出粗糙度和分离性，以说出每个录音中的两个音调的能力。 13个声音来自西方吉他在一个八度音阶中弹奏的所有13个间隔，另一个声音主要来自非西方乐器，比较熟悉西方听众的陌生乐器声音。另外，在将机械基底膜运动转移到神经尖峰的人工耳蜗模型中处理声音，然后进行后处理，以模拟不同程度的巧合检测。分离感感知在熟悉和陌生的声音之间表现出明显的区别，而粗糙感感知并没有。通过与模拟相关的感知，发现了不同的感知策略。熟悉的声音与高度巧合检测的高度正相关，在那里只剩下3-5个周期，而陌生的声音与巧合水平低相关。这分别对应于对音高和音色的关注。另外，分离感感知在熟悉和陌生的声音之间显示出感知与神经相关性之间的相反相关性。这与熟悉和陌生的声音之间的区别的感知发现相关。
Multi-pitch perception is investigated in a listening test using 30 recordings of musical sounds with two tones played simultaneously, except for two gong sounds with inharmonic overtone spectrum, judging roughness and separateness as the ability to tell the two tones in each recording apart. 13 sounds were from a Western guitar playing all 13 intervals in one octave, the other sounds were mainly from non-Western instruments comparing familiar with unfamiliar instrument sounds for Western listeners. Additionally the sounds were processed in a cochlear model transferring the mechanical basilar membrane motion into neural spikes followed by a post-processing simulating different degrees of coincidence detection. Separateness perception showed a clear distinction between familiar and unfamiliar sounds, while roughness perception did not. By correlating perception with simulation different perception strategies were found. Familiar sounds correlated strongly positive with high degrees of coincidence detection, where only 3-5 periodicities were left, while unfamiliar sounds correlated with low coincidence levels. This corresponds to an attention to pitch and timbre respectively. Additionally, separateness perception shows an opposite correlation between perception and neural correlates between familiar and unfamiliar sounds. This correlates with the perceptional finding of the distinction between familiar and unfamiliar sounds with separateness.
