Aurally sensitized flat frequency response noise reduction compansion system

1987 ◽  
Vol 82 (5) ◽  
pp. 1869-1869
Author(s):  
James Waller
Keyword(s):  
Noise Reduction ◽  
Frequency Response ◽  
Flat Frequency Response

Using the dead leaves pattern for more than spatial frequency response measurements

2020 ◽  
Vol 2020 (16) ◽  
pp. 148-1-148-6
Author(s):  
Uwe Artmann
Keyword(s):  
Image Quality ◽  
Light Intensity ◽  
Spatial Frequency ◽  
Noise Reduction ◽  
Frequency Response ◽  
Dynamic Range ◽  
Video Streams ◽  
Camera System ◽  
Camera Systems ◽  
The Dead

The dead leaves pattern is very useful to obtain an SFR from a stochastic pattern and can be used to measure texture loss due to noise reduction or compression in images and video streams. In this paper, we present results from experiments that use the pattern and different analysis approaches to measure the dynamic range of a camera system as well as to describe the dependency of the SFR on object contrast and light intensity. The results can be used to improve the understanding of the performance of modern camera systems. These systems work adaptively and are scene aware but are not well described by standard image quality metrics.

Wideband flat frequency response of thermo-acoustic emission

2012 ◽  
Vol 45 (34) ◽  
pp. 345401 ◽  
Author(s):  
Hanping Hu ◽  
Yandong Wang ◽  
Zedong Wang
Keyword(s):  
Acoustic Emission ◽  
Frequency Response ◽  
Flat Frequency Response

Balanced Intermodulation Reference With Flat Frequency Response Using Nonlinearity Equalization

2020 ◽  
Vol 62 (6) ◽  
pp. 2634-2637
Author(s):  
Qianwen Chen ◽  
Xiong Chen ◽  
David J. Pommerenke ◽  
Ming Yu
Keyword(s):  
Frequency Response ◽  
Flat Frequency Response

Measurement of Velopharyngeal Closure Force during Vowel Production

1994 ◽  
Vol 31 (5) ◽  
pp. 356-363 ◽  
Author(s):  
Jerald B. Moon ◽  
David P. Kuehn ◽  
Jessica J. Huisman
Keyword(s):  
Frequency Response ◽  
Human Subjects ◽  
Force Sensing ◽  
Vowel Production ◽  
Additional Information ◽  
Velopharyngeal Closure ◽  
High Vowels ◽  
Flat Frequency Response

The purposes of this study were to (a) design and test a new velopharyngeal closure force sensing bulb, and (b) use the closure force bulb to gather additional information on the variations in closure force associated with different vowels. The closure force sensing bulb possessed a flat frequency response to 30 Hz. Its output was highly linear relative to applied gram force. Reliable placement of the bulb in human subjects was achieved following prescribed placement criteria. The bulb was sensitive to small variations in velopharyngeal closure force. In agreement with some previous reports, high vowels were associated with greater velopharyngeal closure forces than low vowels. The results of this Investigation support the notion that articulatory goals are specified for vowels. This vowel specificity was observed during production in both isolation and in context.

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