Realising I had taken for granted knowing what the unit of measurement was, or what exactly it was gauging, we appreciated this introduction and overview of the decibel—via Quantum of Sollazzo. Sort of like the distinction between mass and weight, sound intensity is measured in terms of pressures in pascals as the deviation from the ambient caused by an acoustic wave through a given medium, and the decibel as a way of expressing the ratio between two values logarithmically—with the silent partner being the threshold of human hearing.
Originally stemming from a technique to measure and compare signal loss over telegraph lines and later telephone circuits, first expressed as loss per miles of standard cable, the new definition developed by Bell Labs was received favourably by operators and long-distance providers, named in honour of the communications pioneer Alexander Graham Bell. Still used chiefly to calibrate signal strength and fidelity as power passes through different exchanges across a network (mathematically, it is easier to process and account for the changes in transmission media and resistance by their additive properties rather than cumulatively by logarithms, which is incidentally the reason why older hardware and appliances last longer being over-engineered by dint of material and electrical tolerances calculated with a slide-rule and rounding up adding up to machines built to a more robust standard than for their planned lifecycle. Because humans perceive an increase in loudness exponentially rather than linearly (per studies in psychophysics known the Weber-Fechner laws that demonstrate gradual increases are likely to go unnoticed by the senses, the contrasted stimuli also seen to carry an effect in registering numbers and statics, in placebos—titration of all types through interoception and voting), the dB scale became a useful measure, as with the Richter scale for earthquakes and the Fujita scale for tornados, for when a in situ judgment might fail.

synchronoptica
one year ago: assorted links worth the revisit (with synchronoptica) plus the discovery of Troy
seven years ago: mythemes, a global weather service, the GDPR goes into effect, drowning does not always look like drowning, the founding of St Petersburg, ancient and modern trade routes plus a walk along the former inter-German border
nine years ago: the classified section, petty commodification, French-Canadien curses plus pizza as alimony
ten years ago: more links to enjoy, a supernatural dating society, the upcoming G-7 plus a new city in Mongolia