I Did Not Know That

Trying to write an article, lacking information and not having luck with contacts, but the sleuthing is always fun nonetheless. Came across this tidbit written by the guy I'd like to interview but can't track down:

"There are many examples in the field of sound where we take the logarithm of a ratio of values. Being a ratio, the number is unit-less. However, to provide a descriptor of what the number is, the term Bel is used. The Bel is named after Alexander Graham Bell.

For example, if we wanted to compare a 100-watt (W) power source to a 20-watt power source, we would say the logarithm power ratio is log(100W/20W) = log (5) = 0.699 Bels. For common sound measurements, the Bel is too large a unit, so we
instead use a tenth of a Bel, also known as a deciBel (dB). The capital B is often omitted when writing out the term, giving us decibel. However, the abbreviation properly maintains the capital B (dB)."

From ftp://download.intel.com/intelpress/excerpts/excerpt_a21c1.pdf