Intrinsic envelope fluctuations and modulation-detection thresholds for narrow-band noise carriers

1999 ◽  
Vol 106 (5) ◽  
pp. 2752-2760 ◽  
Author(s):  
Torsten Dau ◽  
Jesko Verhey ◽  
Armin Kohlrausch
Keyword(s):  
Narrow Band ◽  
Detection Thresholds ◽  
Narrow Band Noise ◽  
Band Noise ◽  
Modulation Detection

Second-order modulation detection thresholds for pure-tone and narrow-band noise carriers

2001 ◽  
Vol 110 (5) ◽  
pp. 2470-2478 ◽  
Author(s):  
C. Lorenzi ◽  
M. I. G. Simpson ◽  
R. E. Millman ◽  
T. D. Griffiths ◽  
W. P. Woods ◽  
...  
Keyword(s):  
Pure Tone ◽  
Narrow Band ◽  
Second Order ◽  
Detection Thresholds ◽  
Narrow Band Noise ◽  
Band Noise ◽  
Modulation Detection

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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