Creating an opposite set of pressure changes in the air surrounding you to cancel out those made by the bell resonating does not stop the bell being rung as it is after the event. All it does is stop the sound being registered as a bell ring. The metal of the bell will still be vibrating and causing the pressure changes in the air itself of course. All that is happening is that a particular change of pressure in the air is being cancelled at that particular point. The differentiated to as near as zero point of time when the bell was struck cannot be changed. Use of "was" intentional...
I am sure that I just heard the sound of a cork being pulled out of a good bottle of red at some infinitesimal point of time in my very recent past history. I will investigate and may post the results here...
Or maybe not :-)
If you have gods or spirits that you wish to be with you at this time of the year I hope that they are... If not have a cracking time anyway...
The Historical Re-enactment Website
From: British archaeology discussion list [mailto:[log in to unmask]] On Behalf Of Hilary Stuart-Williams
Sent: 23 December 2014 21:56
To: [log in to unmask]
Subject: Re: [BRITARCH] Just a minute
But how do you know that it was a bell until you hear it? Surely the prime
characteristic of a bell is its sound. So you can't be sure that a "bell"
was struck until you hear the noise? Why do I sense various Greek
philosophers rolling over in their graves ...
On 24 December 2014 at 08:38, Dave Tooke <[log in to unmask]> wrote:
> Surely it's rung when it's struck. Even if no one hears it. Rather like
> the tree falling in the forest.
> And if so, your noise cancelling technology is irrelevant.
> Dave Tooke
> Sent from my iPhone
> > On 23 Dec 2014, at 21:31, Hilary Stuart-Williams <[log in to unmask]>
> > Hmmm ... I'd raise a couple of points with that. The first is: when is a
> > bell rung? Is it rung when it is struck or when you hear the sound? And
> > related to that, I CAN actually un-ring it. Because the sound takes a
> > finite amount of time to travel, I can sense it between you and the
> > and generate an opposite signal that cancels it out before you hear it.
> > There are a lot of technologies that use that method for sound deadening.
> > And please note that I said Method not Methodology.
> > Happy Christmas eve to all.
> > Hil
> >> On 24 December 2014 at 00:19, Orion <[log in to unmask]> wrote:
> >> Another way of looking at it may be that the present is a point in time.
> >> It
> >> has no length. It is a point that moves through time and we are always
> >> the present. We cannot affect the past and we never are in the future.
> >> It's been said that we cannot un ring a bell. But we also cannot know
> >> the bell will ring until it has rung. At present we cannot be sure.
> >> Just a thought,
> >> Orion
> >> At 09:04 AM 12/23/2014 -0000, Dave Hayward wrote:
> >>> Colleagues
> >>> To add to the seasonal friviality,
> >>> In the Army we were always taught it was either 23.59 or 00.01hrs, =
> >>> midnight does not exist!
> >>> I suppose it is much like what is defined as 'the present' - I would =
> >>> suggest that does not exist also, can you measure 'the present' in
> time? =
> >>> Everything is in the past or in the future!=20
> >>> Anyhow, to leave you with that contemplative thought, I hope you all =
> >>> have a good festive season and may archaeology flourish in 2015.
> >>> Regards
> >>> Dave Hayward
> > --
> > Dr Hilary Stuart-Williams
> > Research Officer - Stable Isotopes
> > The Research School of Biology
> > R.N. Robertson Building (46)
> > The Australian National University
> > Canberra ACT 2601
> > Work: 61 02 6125 2099
Dr Hilary Stuart-Williams
Research Officer - Stable Isotopes
The Research School of Biology
R.N. Robertson Building (46)
The Australian National University
Canberra ACT 2601
Work: 61 02 6125 2099
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