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Sones phons loudness decibel sone 0.2 - 0.3 - 0.4 - 0.5 - 0.6 define sone rating conversion dB level dBA phon phone volume intensity calculator dB dBa and Sone relate fan
![dBA weighting filter frequency to dBA and dBC dB(A) and dB(C) A weighted sound calculate DIN IEC 651 calculator equal-loudness contours - sengpielaudio Sengpiel Berlin dBA weighting filter frequency to dBA and dBC dB(A) and dB(C) A weighted sound calculate DIN IEC 651 calculator equal-loudness contours - sengpielaudio Sengpiel Berlin](http://www.sengpielaudio.com/Bewertungsfilter02.gif)
dBA weighting filter frequency to dBA and dBC dB(A) and dB(C) A weighted sound calculate DIN IEC 651 calculator equal-loudness contours - sengpielaudio Sengpiel Berlin
![a) The A-weighted curve for sound data compensation; (b) conversion... | Download Scientific Diagram a) The A-weighted curve for sound data compensation; (b) conversion... | Download Scientific Diagram](https://www.researchgate.net/publication/368860539/figure/fig1/AS:11431281126158074@1678561149438/a-The-A-weighted-curve-for-sound-data-compensation-b-conversion-from-dB-SPL-to-dBA_Q320.jpg)
a) The A-weighted curve for sound data compensation; (b) conversion... | Download Scientific Diagram
![dBA weighting filter frequency to dBA and dBC dB(A) and dB(C) A weighted sound calculate DIN IEC 651 calculator equal-loudness contours - sengpielaudio Sengpiel Berlin dBA weighting filter frequency to dBA and dBC dB(A) and dB(C) A weighted sound calculate DIN IEC 651 calculator equal-loudness contours - sengpielaudio Sengpiel Berlin](http://www.sengpielaudio.com/WeightingsA-And-C.gif)