Niels L. Ellegaard (gnalle@ruc.dk) skrev følgende:
> "Martin Petersen" <knopfisk@[fjern]vvs.dk> writes:
>> Er der en videnskabelig forklaring på at størstedelen af vækkeure
>> har en snoozefunktion på 9 min (altså den knap man trykker på for at
>> sove en smule videre på den anden side)?
>
> Man kan finde masser af forklaringer med Google:
>
http://www.google.com/search?q=snooze+9+minutes
>
> Mange af forklaringerne er konsistente med den her:
>
http://www.jewishworldreview.com/0903/glad_u_asked092403.asp
>
> By setting the snooze time to 9 minutes, modern digital alarm clocks
> only needs to watch the last digit of the time. So, if you hit
> snooze at 6:45, the alarm goes off again when the last digit hits 4
> - at 7:54. They couldn't make the snooze period 10 minutes, or the
> alarm would go off right away - or the clock would take more
> circuitry.
>
> Historically speaking, there's another element to the answer. Clock
> experts say when snooze alarms were invented, the gears in alarm
> clocks were standardized. The snooze gear was introduced into the
> existing mix and its teeth had to mesh with the other gears'
> teeth. The engineers had to choose between a gear that made the
> snooze period nine-plus minutes or 10-plus minutes. Because of the
> gear configuration, 10 minutes on the nose was not an option.
Takker for svarene... Det er det mest mærkelige man (jeg) tænker på når man
(jeg) ikke kan sove. :)
- Martin