“Hearing” with the Sense of Touch

Knudsen, Vern O.

doi:10.1080/00221309.1928.9920128

Cited by 96 publications

(32 citation statements)

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“…It is significant that in the published research on vibrotactile intensity discrimination, the lowest relative DLs for the detection of changes in vibration amplitude have been reported in a study in which an amplitude-modulation method was used (Knudson, 1928), a method similar to the continuous-pedestal condition. At low amplitudes of stimulation, the relative DL was approximately 1.0 dB, and, as amplitude was increased, the relative DL decreased, eventually approaching values as low as 0.4 dB.…”

Section: A Methodsmentioning

confidence: 97%

“…The Weber constant c, the ratio between DL and stimulus intensity, however, has been found to be somewhat variable from experiment to experiment. Knudson (1928) reported the lowest value (0.05), a value corresponding to a 0.4-dB increase in amplitude, and Sherrick (1950) reported the highest value (0.3 as cited by Craig, 1972), corresponding to a 2.3-dB increase in amplitude. Weber constants between these extremes have been reported by Craig ( 1972Craig ( , 1974, Fucci et aT.…”

Section: Introductionmentioning

confidence: 89%

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Vibrotactile intensity discrimination measured by three methods

Gescheider

Bolanowski²,

Verrillo³

et al. 1990

The Journal of the Acoustical Society of America

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The difference threshold for the detection of changes in vibration amplitude was measured as a function of the intensity and frequency of stimuli delivered through a 2.9-cm2 contactor to the thenar eminence. Stimuli were either 25- or 250-Hz sinusoids, narrow-band noise centered at 250 Hz, or wideband noise. Thresholds were measured by two-interval, forced-choice tracking under three methods of stimulus presentation. In the gated-pedestal method, subjects had to judge which of two 700-ms bursts of vibration separated by 100 ms was more intense. In the continuous-pedestal method, subjects had to detect a 700-ms increment in the amplitude of an ongoing pedestal of vibration. In the two-burst-continuous-pedestal method with 1500-ms pedestals, the subject had to detect which of two successively presented pedestals contained a 500-ms amplitude increment. Thresholds were consistently lower for detecting increments in the amplitude of a continuous pedestal of vibration than for detecting amplitude differences between briefly presented successive pedestals or amplitude increments in successive pedestals. A "near miss" to Weber's law was found both for sinusoidal and for noise stimuli. The difference threshold was not affected by stimulus frequency condition.

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Section: A Methodsmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 89%

Vibrotactile intensity discrimination measured by three methods

Gescheider

Bolanowski²,

Verrillo³

et al. 1990

The Journal of the Acoustical Society of America

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show abstract

“…The same psychophysical algorithm described above was used, with stimulus adjustments of 4 units (lo-' amperes). 'This algorithm differs from that suggested by the manufacturer only in that we have specified the target number of trials (at least 20) within which a minimum target number of stimulus intensity adjustment direction changes (at least 4) must have occurred. We also required that two consecutively correct trials have occurred before lowering the intensity.…”

Section: Subjectsmentioning

confidence: 97%

Quantitative measurement of cutaneous perception in diabetic neuropathy

et al. 1995

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To determine the diagnostic value of various cutaneous sensory modalities in diabetic neuropathy, we studied cutaneous perception at the dominant hallux of 113 subjects (32 normal healthy controls and 81 diabetic subjects). The cutaneous sensory perception tests included warm and cold thermal perception, vibration, touch-pressure sensation, and current perception testing (CPT). The sensitivity of each modality when specificity is held greater than 90% was as follows: warm = 78%, cold = 77%, vibration = 88%, tactile-pressure = 77%, 5-Hz CPT = 52%, 250-Hz CPT = 48%, and 2000-Hz CPT = 56%. Combination thermal and vibratory gave optimum sensitivity (92-95%) and specificity (77-86%). We conclude that vibratory and thermal testing should be the primary screening tests for diabetic peripheral neuropathy. Other modalities may be of use only in specific situations.

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“…A contactor which ( u ) is capable of application not only to the finger tips, the area most commonly selected, but also to the less accessible areas of the skin or (6) with which the more easily manipulated areas can be brought into contact. It is desirable that contact mediums of different sizes be provided for the investigation of skin areas of correspondingly different size.…”

mentioning

confidence: 99%