Ero sivun ”Äänenpaine” versioiden välillä

*[http://www.usmotors.com/products/ProFacts/sound_power_and_sound_pressure.htm Sound pressure and sound power – two commonly confused characteristics of sound.]

*[http://www.sengpielaudio.com/calculator-levelchange.htm How many decibels is twice as loud? Sound level change and the respective factor of sound pressure or sound intensity.]

 

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