Fleetie wrote:

Yes, and I omitted the best example of all from my post on this
subject: The human perception of the pitch of audio frequencies.

That, IMO is the best, most demonstrable example of the logarithmic
nature of the response of our sensors.

At 50Hz, a change of 5Hz is easily audible. At 12000Hz, I reckon you
could forget about noticing it. Above about 15kHz, you just hear it
or you don't; there's no real detectable change in perceived pitch, from
what I remember.


Not only the pitch, but also the intensity of sound is perceived logarithmically
-- hence measurement in decibels (dB).

In astronomy there is, of course, the magnitude scale of brightness: the modern
definition in which each step of magnitude corresponds to a luminosity factor of
the fifth root of 100 was designed to be commensurate with the 'subjective' scale
developed by the ancients.

--
Odysseus