scholarly journals Acoustic Spectrum Analysis with Coherent Optics

1967 ◽  
Vol 42 (5) ◽  
pp. 1166-1166 ◽  
Author(s):  
George E. Stanford
Keyword(s):  
Spectrum Analysis ◽  
Acoustic Spectrum ◽  
Coherent Optics

Acoustic spectrum analysis using polymer integrated optics

1999 ◽  
Author(s):  
Araz Yacoubian ◽  
Vadim Chuyanov ◽  
Sean M Garner ◽  
Hua Zhang ◽  
William H Steier ◽  
...  
Keyword(s):  
Integrated Optics ◽  
Spectrum Analysis ◽  
Acoustic Spectrum

Laser-Induced Damage on Fused Silica With Photo-Acoustic Spectrum Analysis

2019 ◽  
Vol 31 (10) ◽  
pp. 787-790 ◽  
Author(s):  
Kejun Chen ◽  
Muyu Yi ◽  
Fan Gao ◽  
Xiang Zhang ◽  
Xiao Yuan
Keyword(s):  
Spectrum Analysis ◽  
Fused Silica ◽  
Acoustic Spectrum ◽  
Laser Induced Damage

Study on Acoustic Catheter of Boiler Tube Leakage Monitoring Systems

2013 ◽  
Vol 448-453 ◽  
pp. 3457-3461
Author(s):  
Yong Xing Lv ◽  
Chen Shuai Yan
Keyword(s):  
Spectrum Analysis ◽  
High Sensitivity ◽  
Acoustic Resonance ◽  
Positive Pressure ◽  
Boiler Tube ◽  
Acoustic Spectrum ◽  
The Common ◽  
Leakage Monitoring ◽  
Low Sensitivity ◽  
Resonance Cavity

Boiler tube leakage is the major reason of affecting the safe operation of the unit now, there are 3 methods of the "four tube" leakage detection: Traditional method, filtering method and acoustic spectrum analysis, acoustic spectrum analysis is the common method, but this method have low sensitivity and the sensor damage easily. Therewith, designed the special acoustic catheter with acoustic resonance cavity type, proved by experiments, the acoustic catheter with acoustic resonance cavity type can enhance leakage sound, can accurately extract leakage signals, has high sensitivity, and can avoid the effect of sensor by fire and hot-gas when the furnace is in positive pressure situation, reduce the installation and maintenance costs of the boiler tube leakage monitor system.

Acoustic spectrum analysis of Mahri orature

2017 ◽  
Vol 9 (1-2) ◽  
pp. 106-118
Author(s):  
Sam Liebhaber
Keyword(s):  
Spectrum Analysis ◽  
The Other ◽  
Digital Method ◽  
Acoustic Spectrum ◽  
Short Vowels ◽  
Poetic Text ◽  
Vernacular Poetry

The question of the metrical organization of Arabian vernacular orature has historically been defined by two approaches: one holds that its metrical system is based on patterned beats of stress, while the other proposes regular alternations of long and short vowels. In this article, I describe some preliminary experiments in using a digital method to derive visual spectrograms of the same lines of Mahri poetry performed in two different modes: chanting and recitation. Given the discrepancy in results between the two, my findings suggest that the organizational rhythm of bedouin vernacular poetry is contingent on performance and is not intrinsic to the poetic text itself. The results further cast suspicion on the salience of vocalic quantity or syllabic quality as the prime determinants of Bedouin vernacular prosody.

scholarly journals Acoustic Spectrum Analysis of Genuine and Counterfeit Euro Coins

2015 ◽  
Vol 21 (3) ◽  
Author(s):  
Alina Gavrijaseva ◽  
Olev Martens ◽  
Raul Land
Keyword(s):  
Spectrum Analysis ◽  
Acoustic Spectrum
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