Listening for Quiet

vincent norris writes:

Well, if really was "a silent sanctuary," then doubling the sound would
not make much difference: two times zero decibels = zero decibels.

The sound level outdoors is rarely zero. And decibels are a log scale, so a
doubling of sound intensity is always an increase of 3 decibels, irrespective
of the starting sound level. It is hard to even perceive an increase of 3
decibels.

Mxsmanic wrote in
:

Airbus writes:

Well, radar vectors are pretty cut and dried - you go where they say.

That's not what I meant. I meant that if only all pilots were fully
competent and all non-pilots were fully incompetent. But the reality
is otherwise.


YOU need to pick up a dictionary and look up the word "defintion"

Fjukkwit.

Unfortunately, everyone drives cars, but hardly anyone flies
airplanes, so cars get the special consideration.


Not everybody drvies cars, fjukkwit.

Bertie

Mxsmanic wrote in
:

Tina writes:

To which I, an nonpilot, can agree, however, the wise person would be
voting to beleive the pilot in matters of the practical aspects of
aviation.

The wisdom I've acquired has taught me to never believe anyone based
on credentials.




If you had actually acquired any wisdonm, you wouldn't be a middle aged
luser pretending to be something you are not,

Fjukkwit.


bertie

Mxsmanic wrote in
:

writes:

Well, the wisdom you have aquired is flawed. It would be much wiser
to make the rebuttable assumption the credentialed indivudual is more
qualified than one claiming to be expert who does not carry the
credentials.

I've been burned too many times to make this mistake, sometimes in
expensive or dangerous ways. Now I want proof that someone is
competent before believing what he says, and credentials are not
proof.



nobody cares if you believe what they say, fjukkwit.


Bertie

Mxsmanic wrote in
:

Tina writes:

This caution, I assume, has led you to the rich and full life you now
enjoy?

No, but a past lack of such wariness has been a contributing factor.


Wow! so, now armed with this wisdom, you can finally get that night
managers job at wal-mart


Bertie

Mxsmanic wrote in
:

vincent norris writes:

Well, if really was "a silent sanctuary," then doubling the sound
would not make much difference: two times zero decibels = zero
decibels.

The sound level outdoors is rarely zero. And decibels are a log
scale, so a doubling of sound intensity is always an increase of 3
decibels, irrespective of the starting sound level. It is hard to
even perceive an increase of 3 decibels.




Fjukkwit.


Bertie

Words of wisdom from my grandmother, but it could have come from grad
school I guess --- some dogs NEED kicking.

On Oct 14, 5:47 am, "Viperdoc" wrote:
(re Mx.)

It is a pathetic attempt at getting attention.

"

On Oct 11, 7:46 pm, Larry Dighera wrote:
On Thu, 11 Oct 2007 15:57:17 -0700, daffy
wrote in . com:

Quite a good article in the Nov/Dec AARP magazine titled "Listening
for Quiet".
It talks about a silent sanctuary in Washington's Olympic National
park. The article
concluded by someone complaining about the silence broken by a small
plane.

The article said "The small plane flying north more than doubles the
ambient sound,
and we react to the intruder as a threat, drawing in, tracking the
source, hunching for
cover until the last traces of engine noise finally die away."

Did the article happen to mention the duration (in seconds) that the
noise from this "intruder" was detectable? There is little question
that small airplanes are noisy, but they are usually only audible for
about 20 seconds. In the area in question, it may be longer, but the
sonic impact of the occasional lone aircraft is nothing compared
living adjacent to a busy street. Perhaps we should consider closing
all the roads in residential neighborhoods. :-)

I live directly below the traffic pattern of a busy GA airport in
Dayton, and there are four airports closeby. I am sensitive to noise,
and I go to great lengths to keep my environment noise-free. I have
noticed that the airplane noise is nowhere close to the noise from all
the lawnmowers that seem to constantly run from April to October.
Airplane noise lasts about 30 seconds. A lawn mower runs for an hour
or two. Sometime the noise never ceases as each neighbor fires up
their lawnmower in turns. It would be interesting to do a measurement
and identify the average contribution from all the noise souces. With
a digital recorder and some signal processing software this ought to
be doable. One also has to consider the impact of noise on the human
ear. Widely varying pitch is worse than a constant dull hum. A
chainsaw noise is worse because of all the "vroom vroom" accelerations
and decelerations.

And your caution, I assume, has led you to the rich and full life you
now enjoy?


On Oct 13, 6:44 pm, Mxsmanic wrote:
writes:
Well, the wisdom you have aquired is flawed. It would be much wiser to
make the rebuttable assumption the credentialed indivudual is more
qualified than one claiming to be expert who does not carry the
credentials.

I've been burned too many times to make this mistake, sometimes in expensive
or dangerous ways. Now I want proof that someone is competent before
believing what he says, and credentials are not proof.

In article ,
says...


vincent norris writes:

Well, if really was "a silent sanctuary," then doubling the sound would
not make much difference: two times zero decibels = zero decibels.



The sound level outdoors is rarely zero.

TRUE

And decibels are a log scale, so a
doubling of sound intensity is always an increase of 3 decibels, irrespective
of the starting sound level.

TRUE


It is hard to even perceive an increase of 3 decibels.

FALSE