Acoustic Stimulus Duration in Relation to Behavioral Responses of Newborn Infants

1972 ◽  
Vol 15 (3) ◽  
pp. 567-571 ◽  
Author(s):  
Daniel Ling
Keyword(s):  
Short Duration ◽  
Stimulus Duration ◽  
Narrow Band ◽  
Acoustic Stimulus ◽  
Newborn Infants ◽  
Behavioral Responses ◽  
Whole Body ◽  
Body Type ◽  
Narrow Band Noise ◽  
Band Noise

Behavioral responses of 160 newborn infants to short duration (50–1000 msec) narrow-band noise stimuli were studied. The proportion of responses obtained, particularly of the whole-body type, increased as a function of duration. Interrupted stimuli (trains of 10 50-msec pulses) proved to be much less effective than continuous stimuli of the same duration.

Stimulus, Response, and Observer Variables in the Auditory Screening of Newborn Infants

1970 ◽  
Vol 13 (1) ◽  
pp. 9-18 ◽  
Author(s):  
Daniel Ling ◽  
Agnes H. Ling ◽  
Donald G. Doehring
Keyword(s):  
High Frequency ◽  
Narrow Band ◽  
Newborn Infants ◽  
Response Strength ◽  
Whole Body ◽  
Stimulus Response ◽  
Narrow Band Noise ◽  
Band Noise ◽  
Masking Noise ◽  
Infant Screening

Behavioral responses of 144 healthy neonates to actual and simulated presentations of three different high-frequency sounds of 85 dB SPL were studied. Stimuli were a narrow-band noise centered at 2000 Hz, a narrow-band noise centered at 3150 Hz, and a pure tone increasing and decreasing in frequency between 2000 and 4000 Hz. A masking noise which prevented knowledge of stimulus events was presented to one member of each observer pair. Results indicated that an observer’s judgments of infant behavior may be significantly influenced by knowledge of stimulus events. More responses were observed with the narrow-band noise centered at 2000 Hz; the most frequently observed responses were strong whole-body movements. A decrement in response strength tended to occur with repeated stimulation. Neither positive nor false positive responses were related to sex, anomalies, gestation period, birth weight, age at test, or body temperature. The inherent complexities of infant screening are discussed in relation to a signal detection paradigm.

scholarly journals Frequency Masking Effects for Vertical Whole-Body Vibration for Seated Subjects

Vibration ◽  
2020 ◽  
Vol 3 (4) ◽  
pp. 357-370
Author(s):  
Anna Schwendicke ◽  
M. Ercan Altinsoy
Keyword(s):  
Narrow Band ◽  
Whole Body Vibration ◽  
Wide Frequency Range ◽  
Vertical Vibration ◽  
Whole Body ◽  
Perception Threshold ◽  
Body Vibration ◽  
Narrow Band Noise ◽  
Band Noise ◽  
Close Proximity

Masking occurs when the perception of a stimulus is affected or covered by the presence of another signal in close proximity either in time or frequency. This study investigated frequency masking effects across a wide frequency range for whole-body vibration (WBV). The hypothesis that masking effects for WBV might be caused by sub-channels within the Pacinian channel was explored in two experiments. One experiment explored the masking effects of narrow band noise (NBN) on the perception threshold of sinusoidal vibrations; another explored the effect of different widths of NBN on the shift of the perception threshold for vertical vibration of seated subjects. The results show distinct masking effects for WBV based on frequency, albeit they do not support the existence of sub-channels within the Pacinian channel. Neither the typical masking effects associated with critical bands nor threshold shifts dependent on the bandwidth of the narrow band noise can be shown. Thus, the hypothesis does not appear to hold for WBV, but frequency masking must be considered for future studies and tactile applications.

scholarly journals Target detection against narrow band noise backgrounds

1999 ◽  
Vol 39 (13) ◽  
pp. 2191-2203 ◽  
Author(s):  
Mark W. Cannon ◽  
Greg J. Reese ◽  
Steven C. Fullenkamp
Keyword(s):  
Target Detection ◽  
Narrow Band ◽  
Narrow Band Noise ◽  
Band Noise

Search for narrow-band-noise modulations of the infrared transmission of blue bronze

2002 ◽  
Vol 12 (9) ◽  
pp. 85-86
Author(s):  
R. C. Rai ◽  
V. A. Bondarenko ◽  
J. W. Brill
Keyword(s):  
Absorption Coefficient ◽  
Narrow Band ◽  
Diode Lasers ◽  
Infrared Transmission ◽  
Narrow Band Noise ◽  
Band Noise ◽  
Tunable Diode Lasers ◽  
Upper Limits ◽  
Blue Bronze

We have searched for narrow-band-noise (NBN) modulations of the infrared transmission in blue bronze, using tunable diode lasers. No modulations were observed, giving an upper limits for NBN changes in the absorption coefficient of $\Delta \alpha_{NBN} < 0.3 $ / cm ($\approx \alpha/2000$). The implication of these results on proposed CDW properties and NBN mechanisms are discussed.

Lateralization of Narrow-Band Noise by Blind and Sighted Listeners

Perception ◽  
10.1068/p3338 ◽  
2002 ◽  
Vol 31 (7) ◽  
pp. 855-873 ◽  
Author(s):  
Helen J Simon ◽  
Pierre L Divenyi ◽  
Al Lotze
Keyword(s):  
Narrow Band ◽  
Lateral Displacement ◽  
Spatial Hearing ◽  
Binaural Hearing ◽  
Center Frequency ◽  
Intensity Difference ◽  
Sensation Level ◽  
Individual Subject ◽  
Narrow Band Noise ◽  
Band Noise

The effects of varying interaural time delay (ITD) and interaural intensity difference (IID) were measured in normal-hearing sighted and congenitally blind subjects as a function of eleven frequencies and at sound pressure levels of 70 and 90 dB, and at a sensation level of 25 dB (sensation level refers to the pressure level of the sound above its threshold for the individual subject). Using an ‘acoustic’ pointing paradigm, the subject varied the IID of a 500 Hz narrow-band (100 Hz) noise (the ‘pointer’) to coincide with the apparent lateral position of a ‘target’ ITD stimulus. ITDs of 0, ±200, and ±400 μs were obtained through total waveform delays of narrow-band noise, including envelope and fine structure. For both groups, the results of this experiment confirm the traditional view of binaural hearing for like stimuli: non-zero ITDs produce little perceived lateral displacement away from 0 IID at frequencies above 1250 Hz. To the extent that greater magnitude of lateralization for a given ITD, presentation level, and center frequency can be equated with superior localization abilities, blind listeners appear at least comparable and even somewhat better than sighted subjects, especially when attending to signals in the periphery. The present findings suggest that blind listeners are fully able to utilize the cues for spatial hearing, and that vision is not a mandatory prerequisite for the calibration of human spatial hearing.

scholarly journals Stream segregation of narrow-band noise bursts

2001 ◽  
Vol 63 (5) ◽  
pp. 790-797 ◽  
Author(s):  
Albert S. Bregman ◽  
Pierre A. Ahad ◽  
Christina Van Loon
Keyword(s):  
Narrow Band ◽  
Stream Segregation ◽  
Narrow Band Noise ◽  
Band Noise
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