A ratio of 20 dB means that the signal is clearly readable. If the signal is much weaker but still above the noise level -- say, 1.3 microvolts -- S/N is much lower, in this case, only 2.28 dB: S/N = 20 log10(1.3) = 2.28 dB This is a marginal situation that could impact ...
(this decibel meter was calibrated with high-precision sound level meter) - beautiful design Use dB Meter PRO to check if the environment your are currently in is safe for your health. Remember that loud sounds can be harmful: 150 dB causes eardrum rupture ...
Noise Level: dB tracker can be used to check the noise of any household appliances like washing machine, refrigerator, computer, air conditioner, etc,. Also you can decide which item you should buy based on the amount sound the electronic unit makes. ...
To remove noise from fetal ECG signals, several methods have been proposed in the literature. These methods are generally used as post-processing tools after removal of the maternal ECG from the abdominal recordings, in order to improve the quality of the extracted fetal ECG. They can be groupe...
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This is indicated by the good agreement of the results of this study with the findings of previous studies. The results of this study showed a loudness exponent of 0.54 based on data averaged by geometric means and 0.51 based on data averaged by medians. 展开 ...
In this study, we assess the effect of two white noise conditions, white noise at 45 dB and white noise level at 65 dB, on the cognitive performance, creativity, and physiological responses of neurotypical adults in a private office space. Among the different cognitive functions, we focus on...
Furthermore, noise reduction by technical means, which could be applied more in this case for further noise protection and suggested also by others, are as follows [45,55,56,57,60]: (i) to reduce airborne noise, e.g., shielding, encapsulation of the noise source (in enclosures), sound...
More bins means smaller ranges for each bin, which produces higher resolution, but the bins will also have fewer counts, and if the data set is small, the histogram will be noisier. Usually the mean value of a range is used and is plotted on the horizontal axis with counts on the ...
Moreover, in the most unfavorable case, the permissible number of impulses due to the value of the A-weighted noise exposure level normalized to an 8-h working day parameter exceeds 5000 per day.Level-dependent hearing protectors constitute the appropriate means to protect the hearing of people ...