On 01/02/2017 17:01, Dave Plowman (News) wrote:
In article ,
RobertL wrote:
On Wednesday, January 18, 2017 at 12:50:08 AM UTC, Dave Plowman (News) wrote:
In article , NY
wrote:

It is generally accepted that human hearing is 20-20,000 Hz
(https://en.wikipedia.org/wiki/Hearing_range and many other sources)
and diminishes with age.

For those who go on about how good FM radio is they should note it
doesn't go anywhere near 20 kHz. ;-)

It goes to 16 kHz which is quite close.

They chose to cut it there so they coudl fit in eth 19 kHz pilot tone
and then use the bandwidth up to 38 kHz for th stereo difference signal.

Yup. They degraded the mono performance to squeeze in stereo. Nothing new
under the sun.

May they realised that few adults could hear above 15 kHz, and children
don't design radio transmission standards.

Also, apparently, they were experimenting with multiplexing of various
sorts since the early days of FM:
http://en.wikipedia.org/wiki/FM_broadcasting#Stereo_FM

--
Max Demian