scholarly journals Effective measurement method for reverberation time using a constant signal-to-noise ratio swept sine signal

2015 ◽  
Vol 36 (4) ◽  
pp. 344-346 ◽  
Author(s):  
Yuki Nakahara ◽  
Yutaka Kaneda
Keyword(s):  
Measurement Method ◽  
Signal To Noise Ratio ◽  
Reverberation Time ◽  
Signal To Noise ◽  
Noise Ratio ◽  
Sine Signal

scholarly journals Validity of the Signal-to-noise Ratio Measurement Method for MRI Using a Phase Image

2015 ◽  
Vol 71 (8) ◽  
pp. 678-684
Author(s):  
Kozo Shimizu ◽  
Yuya Yamatani ◽  
Akihiro Nogi ◽  
Toshinari Okamoto
Keyword(s):  
Measurement Method ◽  
Signal To Noise Ratio ◽  
Phase Image ◽  
Signal To Noise ◽  
Ratio Measurement ◽  
Noise Ratio

scholarly journals Children’s Recall of Words Spoken in Their First and Second Language: Effects of Signal-to-Noise Ratio and Reverberation Time

2016 ◽  
Vol 6 ◽  
Author(s):  
Anders Hurtig ◽  
Marijke Keus van de Poll ◽  
Elina P. Pekkola ◽  
Staffan Hygge ◽  
Robert Ljung ◽  
...  
Keyword(s):  
Second Language ◽  
Signal To Noise Ratio ◽  
Reverberation Time ◽  
Signal To Noise ◽  
Language Effects ◽  
Noise Ratio

Chinese speech intelligibility of children in noisy and reverberant environments

2017 ◽  
Vol 27 (10) ◽  
pp. 1357-1363
Author(s):  
Jianxin Peng ◽  
Shengju Wu
Keyword(s):  
Speech Intelligibility ◽  
Signal To Noise Ratio ◽  
Reverberation Time ◽  
Critical Factors ◽  
Older Children ◽  
Signal To Noise ◽  
Wide Range ◽  
Reverberant Environments ◽  
Noise Ratio ◽  
Intelligibility Score

Reverberation time and signal-to-noise ratio in classrooms are critical factors to speech intelligibility. In this study, the combined effect of reverberation time and signal-to-noise ratio on Chinese speech intelligibility of children was investigated in 28 elementary school classrooms in China. The results show that Chinese speech intelligibility scores increase with an increase of signal-to-noise ratio and the age of children, and decrease with an increase of reverberation time in classrooms. Younger children require higher signal-to-noise ratio and shorter reverberation time than older children to understand the speech. The A-weighted signal-to-noise ratio combined with a wide range of reverberation time can be used to predict speech intelligibility score and serve as a criterion for classroom design for elementary schools.

scholarly journals A Direct Current Measurement Method Based on Terbium Gallium Garnet Crystal and a Double Correlation Detection Algorithm

Sensors ◽  
2019 ◽  
Vol 19 (13) ◽  
pp. 2997
Author(s):  
Shen ◽  
Chen ◽  
Yu ◽  
Ge ◽  
Han ◽  
...  
Keyword(s):  
Direct Current ◽  
Measurement Method ◽  
Signal To Noise Ratio ◽  
Detection Algorithm ◽  
Current Measurement ◽  
Garnet Crystal ◽  
Signal To Noise ◽  
Control Measurement ◽  
Noise Ratio ◽  
Direct Current Measurement

When applying an optical current transformer (OCT) to direct current measurement, output signals exhibit a low signal-to-noise ratio and signal-to-noise band overlap. Sinusoidal wave modulation is used to solve this problem. A double correlation detection algorithm is used to extract the direct current (DC) signal, remove white noise and improve the signal-to-noise ratio. Our sensing unit uses a terbium gallium garnet crystal in order to increase the output signal-to-noise ratio and measurement sensitivity. Measurement errors of single correlation and double correlation detection algorithms are compared, and experimental results showed that this measurement method can control measurement error to about 0.3%, thus verifying its feasibility.

Chinese Syllable and Phoneme Identification in Noise and Reverberation

2015 ◽  
Vol 39 (4) ◽  
pp. 483-488
Author(s):  
Jianxin Peng
Keyword(s):  
Chinese Character ◽  
Signal To Noise Ratio ◽  
Reverberation Time ◽  
Impulse Responses ◽  
Signal To Noise ◽  
Identification Score ◽  
Initial Identification ◽  
Ratio Condition ◽  
Noise Ratio ◽  
Phoneme Identification

Abstract Chinese is a tonal language, which differentiates it from non-tonal languages in the Western countries. A Chinese character consists of an initial, a final, and a tone. In the present study, the effects of noise and reverberation on the Chinese syllable, initial, final, and tone identification in rooms were investigated by using simulated binaural impulse responses through auralization method. The results show that the syllable identification score is the lowest, the tone identification score is the highest, and the initial identification scores are lower than those of the final identification under the same reverberation time and signal-to-noise ratio condition. The Chinese syllable, initial, and final identification scores increase with the increase of signal-to-noise ratio and decrease of the reverberation time. The noise and reverberation have insignificant effects on the Chinese tone identification scores under most room acoustical environments. The statistical relationship between the Chinese syllable articulation and phoneme articulation had been experimentally proved under different noise and reverberation conditions in simulated rooms.

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