The small microphone is not a problem: I've used a small mic from a cellphone to make an audio downconverter used as a bat detector, I can try with that hardware first.
On Wed, Sep 12, 2012 at 6:55 PM, Randy D. Hunt <randy_hunt...@yahoo.com>wrote: > On 9/12/2012 2:21 AM, Azelio Boriani wrote: > >> Interesting: trying to "hear" a low frequency crystal using a >> microphone... >> it should be hard: the crystal has to make the case vibrate and this is >> energy consuming (unless it resonates). I don't expect to pick up nothing, >> except the step motor driving the hands. >> >> On Wed, Sep 12, 2012 at 9:45 AM, Hal Murray <hmur...@megapathdsl.net> >> wrote: >> >> I have a $49 Casio Wave Ceptor, white face black numerals, analog hands >>>> including second hand, date, alarm and WWVB syncing in the middle of the >>>> night. Only had to replace the battery once and it ticks are closer than >>>> >>> I >>> >>>> can discern when comparing to WWV @ 10or 15 Mhz. >>>> >>> Has anybody "listened" to such a watch? (with a microphone) >>> >>> Can you hear both the 32KHz basic timekeeping as well as the "tick" when >>> the >>> second hand takes a step? >>> >>> >>> -- >>> These are my opinions. I hate spam. >>> >>> >>> >>> >>> _______________________________________________ >>> time-nuts mailing list -- time-nuts@febo.com >>> To unsubscribe, go to >>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >>> and follow the instructions there. >>> >>> _______________________________________________ >> time-nuts mailing list -- time-nuts@febo.com >> To unsubscribe, go to >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. >> >> Not only that, but 32,000 Hz is about 12,000 Hz higher than the highest > frequency that we are supposed to be able to hear. . . > > Randy > > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
