The Hazard of Exposure to 2.075 kHz Center Frequency Narrow Band Impulses

1991 ◽  
Author(s):  
James H. Patterson ◽  
Hamernik Jr. ◽  
Ahroon Roger P. ◽  
Turrentine William A. ◽  
Hargett George ◽  
...  
Keyword(s):  
Narrow Band ◽  
Center Frequency

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 Fine-Grained Frequencies Meet Synchronous Transmission

2021 ◽  
Author(s):  
Jagnyashini Debadarshini ◽  
Sudipta Saha
Keyword(s):  
Narrow Band ◽  
Group Communication ◽  
Group Formation ◽  
Synchronous Communication ◽  
Center Frequency ◽  
Fine Grained ◽  
Frequency Capture ◽  
Maximum Benefit ◽  
Depth Study ◽  
Frequency Distance

<div>Fine-grained frequencies have been used in several recent works to enhance network throughput as well as combat Cross Technology Interference (CTI) issues in licence free ISM bands. We observe that synchronous communication based strategies, due to the scope of inter-frequency capture-effect, are inherently more capable of supporting in-parallel communication over multiple channels even when the Center Frequency Distance (CFD) of the channels are very low (<5 MHz). In this work, we pursue an in-depth study of how fine-grained frequencies can be used in conjunction with synchronous communication to extract the maximum benefit from a very narrow band of available frequencies (e.g., 2- 5 MHz) for in-parallel intra-group communication. In this direction, we propose a simple and efficient group formation strategy to automatically define groups in a given WSN/IoT network to boost up in-parallel intra-group communication efficiency. Through extensive experimental evaluations in existing WSN/IoT testbeds, we show that in-parallel one-to-all dissemination in the groups formed through the proposed strategy can execute with upto 73% higher reliability while consuming upto 41% lower energy as compared to the same running among the groups formed through naive strategy with only 4 consecutive frequencies separated by 1 MHz and upto 20 groups.</div>

Narrowband Bandpass Microstrip Filter Design

2014 ◽  
Vol 945-949 ◽  
pp. 2338-2341
Author(s):  
Yang Li
Keyword(s):  
Filter Design ◽  
Narrow Band ◽  
Simulation Software ◽  
Center Frequency ◽  
Band Pass Filter ◽  
Pass Filter ◽  
Band Filter ◽  
Prototype Structure ◽  
Narrow Band Filter ◽  
Band Pass

This paper analyzes the basic theory of the microstrip narrow-band filter design and accomplishes the design of narrow band-pass filter whose center frequency is on L-band with the help of the Agilent ADS simulation software. The filter adopts Chebyshev’s prototype structure and consists of coupled microstrip line. Its fluctuation is less than 0.5dB and attenuation is less than 1.5dB between 1.9GHZ and 2.1GHZ .Its port Reflection coefficient less than-15dB and attenuation is greater than 20dB at 1.72GHZ and 2.3GHZ. Layout simulation meets the requirement of filter design.

A center frequency adjustable narrow band filter for the detection of weak single frequency signal

2014 ◽  
Vol 85 (4) ◽  
pp. 044708 ◽  
Author(s):  
Yunhong Xin ◽  
ZhenMing Xiang ◽  
LeMing Dong ◽  
Bing Zhu ◽  
Hui Cao ◽  
...  
Keyword(s):  
Narrow Band ◽  
Single Frequency ◽  
Center Frequency ◽  
Frequency Signal ◽  
Band Filter ◽  
Narrow Band Filter

scholarly journals A Study on Narrow-band THz (Terahertz) Source with Adjustable Center Frequency Based on Optical Rectification

2016 ◽  
Vol 10 (1) ◽  
pp. 172-179 ◽  
Author(s):  
Ling Zhou ◽  
Xiang-wen Li ◽  
Jiang-ming Kuang ◽  
Shuang Zhang ◽  
Yi-he Liu
Keyword(s):  
Narrow Band ◽  
Optical Rectification ◽  
Center Frequency ◽  
Terahertz Source ◽  
Adjustable Center

scholarly journals Features of application of the sampling theorem when processing narrow-band radio signals with known center frequency of the spectrum

Radiotekhnika ◽  
2020 ◽  
Vol 3 (202) ◽  
pp. 160-163
Author(s):  
Е.В. Рогожкин ◽  
Ю.И. Подъячий ◽  
Л.Я. Емельянов
Keyword(s):  
Narrow Band ◽  
Sampling Theorem ◽  
Center Frequency ◽  
Radio Signals

scholarly journals Narrow-band filter for satellite communication systems

2021 ◽  
Vol 10 (3) ◽  
pp. 198
Author(s):  
Alexander Vladimirovich Strizhachenko ◽  
Sergey Nikolayevich Shulga
Keyword(s):  
Communication Systems ◽  
Satellite Communication ◽  
Narrow Band ◽  
Longitudinal Axis ◽  
Center Frequency ◽  
Narrow Bandwidth ◽  
Band Filter ◽  
Narrow Band Filter ◽  
Paper Filter ◽  
The Subject

Design narrow-band compact filters, based on high-quality waveguide-dielectric resonators with anisotropic materials is the subject of this paper. Filter represents a segment of a rectangular waveguide rotated around the longitudinal axis of the waveguide 90 degrees and containing one or more dielectric inserts that completely fill the resonator along the narrow wall of the waveguide and partially along the wide one. A distinctive feature of the proposed filter is higher slope steepness of the amplitude-frequency characteristic, and high manufacturability in the centimeter range. The designed narrow-band filter satisfies contradictory requirements: it combines narrow bandwidth (≈ 0.1% of center frequency <em>f</em><sub>0</sub>) with low passband insertion loss (≤ 1 dB).

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