HEARING A MISTUNED HARMONIC IN AN OTHERWISE PERIODIC COMPLEX TONE
HEARING A MISTUNED HARMONIC IN AN OTHERWISE PERIODIC COMPLEX TONE
复制标题
DOI：
10.1121/1.400246
复制
发表时间：
1990-10-01
影响因子：
2.4
通讯作者：
SMITH, BK
中科院分区：
文献类型：
--
作者：
HARTMANN, WM;MCADAMS, S;SMITH, BK
听者在其他周期性音调中检测失谐的能力代表了在稳态信号提示的基础上分离听觉实体的能力。通过使用一个任务，听众匹配一个失谐谐波的音高，这种能力已经被研究，以找到失谐数，基频，信号电平和信号持续时间的依赖性。结果大大增加了先前从辨别实验和听众计算明显来源的实验中获得的数据。虽然以前的工作强调了光谱分辨率在分离过程中的作用，但目前的工作表明，神经同步是一个重要的考虑因素；我们的数据显示，听众失去了分离高频失谐谐波的能力，此时同步的神经活动消失了。这种损耗的函数形式对谐波的间距不敏感。匹配实验还允许测量失谐谐波的音高。数据显示了一种形式的移位，反对完全基于部分掩蔽的音高移位模型。
The ability of a listener to detect a mistuned harmonic in an otherwise periodic tone is representative of the capacity to segregate auditory entities on the basis of steady-state signal cues. By use of a task in which listeners matched the pitch of a mistuned harmonic, this ability has been studied, in order to find dependences on mistuned harmonic number, fundamental frequency, signal level, and signal duration. The results considerably augment the data previously obtained from discrimination experiments and from experiments in which listeners counted apparent sources. Although previous work has emphasized the role of spectral resolution in the segregation process, the present work suggests that neural synchrony is an important consideration; our data show that listeners lose the ability to segregate mistuned harmonics at high frequencies where synchronous neural firing vanishes. The functional form of this loss is insensitive to the spacing of the harmonics. The matching experiment also permits the measurement of the pitches of mistuned harmonics. The data exhibit shifts of a form that argues against models of pitch shifts that are based entirely upon partial masking.