Grandma Moon Speaks: Loudness or Volume

Topics Covered: Loudness Phon and Sone Music is everybody’s possession. It’s only publishers who think that people own it – John Lennon The above is a section of the song Black or White by Michael Jackson from three different releases. Same song, but mixed to sound louder with each passing release. Our perception of sound […]

Grandma Moon Speaks: RMS and the Decibel

Topics Covered: Root Mean Square The Decibel Common dB Values Day has its eyes; night has its ears – Japanese Proverb In the above drawing, the numbers represent: 1. Silence 2. Audible sound 3. Atmospheric pressure 4. Sound pressure 105 Pa is the pressure at sea level, or 1 atmosphere approximately. We have already seen […]