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function addDecibels(){return (10*Math.log10([].reduce.call(arguments,(p,c)=>p+Math.pow(10,c/10),0))).toFixed(1);} alert( addDecibels(2,2) ); The underhanded bit is that its not actually underhanded - if you add a 2dB sound source to another 2dB sound source then resulting combined noise will be 5dB (and if you add two 30dB sources then its 33dB) as they are measured on a log scale.
You can see it on a different calculator here.
#JavaScript#
function addDecibels(){return (10*Math.log10([].reduce.call(arguments,(p,c)=>p+Math.pow(10,c/10),0))).toFixed(1);} alert( addDecibels(2,2) ); The underhanded bit is that its not actually underhanded - if you add a 2dB sound source to another 2dB sound source then resulting combined noise will be 5dB (and if you add two 30dB sources then its 33dB) as they are measured on a log scale.
You can see it on a different calculator here.
function addDecibels(){return (10*Math.log10([].reduce.call(arguments,(p,c)=>p+Math.pow(10,c/10),0))).toFixed(1);} alert( addDecibels(2,2) ); The underhanded bit is that its not actually underhanded - if you add a 2dB sound source to another 2dB sound source then resulting combined noise will be 5dB (and if you add two 30dB sources then its 33dB) as they are measured on a log scale.
You can see it on a different calculator here.
#JavaScript#
function addDecibels(){return (10*Math.log10([].reduce.call(arguments,(p,c)=>p+Math.pow(10,c/10),0))).toFixed(1);} alert( addDecibels(2,2) ); The underhanded bit is that its not actually underhanded - if you add a 2dB sound source to another 2dB sound source then resulting combined noise will be 5dB (and if you add two 30dB sources then its 33dB) as they are measured on a log scale.
You can see it on a different calculator here.