A critical band filter in touch
A critical band filter in touch
复制标题
接触中的关键带滤波器
作者：
JC Makous;R. Friedman;CJ Vierck
通过改变振动触觉刺激的光谱，分离出人类的单独机械感受器系统。首先，在四个受试者中的每一个的指尖上获得与正弦曲线的频率的阈值相关的函数，并且发现其包括两个肢体：环层肌和非环层肌肢体。环层肢内的峰值灵敏度（由环层小体介导）约为250 Hz，跨越65至400 Hz的区域。非Pacinian肢体在10和65 Hz之间的区域中没有检测到灵敏度的变化。这两个肢体，然后被视为心理物理通道的实验中，窄带噪声和个人正弦波被用来激发一个或两个通道。在第二和第三个实验中，噪声刺激的带宽从8到70 Hz变化，中心频率从25到218 Hz变化。掩蔽功能获得了ON频率条件（正弦测试和噪声掩蔽占据相同的频率区域）和OFF频率条件（测试和掩蔽占据不同的频率区域）。通频实验用于估计Pacinian信道在阈值处的信噪比（S/N）。关闭频率掩蔽实验用于推断在低于65 Hz的频率下的Pacinian通道的形状，其中Pacinian激活的阈值高于检测阈值。这三个实验的结果预测了第四个掩蔽实验的结果，该实验采用无参数模型，将Pacinian通道视为整合刺激功率的过滤器。结果表明，Pacinian通道类似于听觉系统中的一个临界频带。
Separate mechanoreceptor systems in humans were isolated by varying the spectra of vibrotactile stimuli. First, the function relating threshold to frequency of a sinusoid was obtained on the fingertip for each of four subjects, and it was found to comprise two limbs: a Pacinian and a non-Pacinian limb. The peak sensitivity within the Pacinian limb (mediated by Pacinian corpuscles) was around 250 Hz and spanned the region from 65 to 400 Hz. The non-Pacinian limb showed no detectable change in sensitivity in the region between 10 and 65 Hz. These two limbs were then treated as psychophysical channels in experiments in which narrow band noise and individual sinusoids were used to excite one or both channels. In the second and third experiments, the noise stimuli varied in bandwidth from 8 to 70 Hz and varied in center frequency from 25 to 218 Hz. Masking functions were obtained for ON- frequency conditions (the sinusoidal test and noise masker occupied the same frequency region) and for OFF-frequency conditions (the test and masker occupied different frequency regions). The ON-frequency experiments were used to estimate the signal-to-noise ratio (S/N) of the Pacinian channel at threshold. The OFF-frequency masking experiments were used to infer the shape of the Pacinian channel at frequencies below 65 Hz, where thresholds for Pacinian activation were above detection threshold. The results of these three experiments predicted the findings of a fourth masking experiment with a parameter free model that treated the Pacinian channel as a filter that integrates stimulus power. The results show that the Pacinian channel is analogous to a critical band in the auditory system.
环绕声对振动触觉阈值的影响：非 Pacinian I (NPI) 通道空间和时间独立性的证据。
DOI：
10.1121/1.399550
发表时间：
1990
期刊：
The Journal of the Acoustical Society of America
影响因子：
--
作者：
VanDoren,CL
通讯作者：
VanDoren,CL
影响因子：
2.5
作者：
BOLANOWSKI, SJ;VERRILLO, RT
通讯作者：
VERRILLO, RT
影响因子：
2.4
作者：
BOLANOWSKI, SJ;GESCHEIDER, GA;CHECKOSKY, CM
通讯作者：
CHECKOSKY, CM