Dont they use the vibration button ??? ############################################################# Am 13.02.2011 um 22:47 schrieb Robert Dickow:
> Speaking of 'audio' classroom tricks, I have recently heard about one that I > don't think I have caught my students doing yet, but it is intriguing: > Students have been reported to keep their texting devices and cell phones on > in class situations and hear them ring without the instructor's knowledge. > According to the reports, they use custom ring tones that sound at > frequencies higher than those perceivable by the teachers. This is because > high frequency sensitivity falls off with age, so the young people can hear > the high pitch squeeking of a cell phone but the teachers/professors cannot. > I'm a little incredulous, because I wonder if these little devices can > reproduce such high frequencies in their ring tones. Has anybody been able > to confirm this? > > Bob Dickow > Lionel Hampton School of Music > University of Idaho > > -----Original Message----- > From: [email protected] [mailto:[email protected]] On Behalf > Of Steve Haflich > Sent: Sunday, February 13, 2011 2:46 AM > To: The Horn List > Subject: Re: [Hornlist] Musicianship > > ...<snip>... In other words, 50Hz is a little more than 1/3 of a semitone > sharp from > A440. That's nowhere near close enough to sound in tune if the notes > were played simultaneously, but it is quite close enough to be > identified as the "same" note as the piano A. The classroom trick might > not have been a demonstration of perfect pitch and fine tuning (which > many victims of perfect pitch indeed seem to have). <snip>... > > _______________________________________________ > post: [email protected] > unsubscribe or set options at > https://pegasus.memphis.edu/cgi-bin/mailman/options/horn/hpizka%40me.com _______________________________________________ post: [email protected] unsubscribe or set options at https://pegasus.memphis.edu/cgi-bin/mailman/options/horn/archive%40jab.org
