No, they think they're sharp!

The navigator© wrote:

Don't they approve of hard labour?

Cheers MC

Flying Tadpole wrote:
The clients are starting to threaten caesareans.

The navigator© wrote:

That's the trouble with confinement.

Cheers MC

Flying Tadpole wrote:

The fruits of my labours.

The navigator© wrote:


Ah well -aren't your problems trifling?

Cheers MC

Flying Tadpole wrote:


The navigator© wrote:



It must be hard in the outback!



Worse than just outback, it's been just deserts lately.



--
(Dr) Tim Fatchen
Director
Fatchen Environmental Pty Ltd
PO Box 462 Mt Barker SA 5251
Phone +61 8 8391 1164
Fax +61 8 8391 5156

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That's acute or grave -depending on their point of view -of course.

Cheers MC

Tim Fatchen wrote:
No, they think they're sharp!

The navigator© wrote:

Don't they approve of hard labour?

Cheers MC

Flying Tadpole wrote:

The clients are starting to threaten caesareans.

The navigator© wrote:


That's the trouble with confinement.

Cheers MC

Flying Tadpole wrote:


The fruits of my labours.

The navigator© wrote:



Ah well -aren't your problems trifling?

Cheers MC

Flying Tadpole wrote:



The navigator© wrote:




It must be hard in the outback!



Worse than just outback, it's been just deserts lately.

On Fri, 01 Aug 2003 06:37:17 -0400, wrote:

Not being a "physic=y" person, but having this knowledge in layman's terms, lower tones carry farther over water and also the
human ear can pick up the lower tones farther away than it can higher tonew...it would also be very unpleasant to have higher
tomes...all the dogs on the shore would howl and everyone would go nuts after awhile...

Lower tones are also less directionally focused.

Not really. The ability to determine the source of the sound is determined by
the receiver, not the transmitter. Our ears are too close together to get a
bearing on low frequency sound.

S/V Cat's Meow
http://www.catsmeow.org

On Fri, 01 Aug 2003 11:09:25 -0400, wrote:

Not really. The ability to determine the source of the sound is determined by
the receiver, not the transmitter. Our ears are too close together to get a
bearing on low frequency sound.

That would make it patently less directional. 8^)

If you assume human ears are the only way to receive sound

S/V Cat's Meow
http://www.catsmeow.org

The frequency of whistles is specified in the US inland version of the ColRegs Annex III:

It describes the fundamental frequency, and range. In summary:

over 200 meters 70-200Hz 2 miles
75-200 130-350 Hz 1.5 miles
20-75 250-525 Hz 1.0 miles
under 20 250-525 Hz 0.5 miles

It also describes the volume of various overtone ranges. For the large ships this is
140-145 dB. For the smallest is 111-120 dB.


wrote in message
...
On Fri, 01 Aug 2003 13:05:34 -0400, Gerard Weatherby
wrote:

On Fri, 01 Aug 2003 11:09:25 -0400, wrote:

Not really. The ability to determine the source of the sound is determined by
the receiver, not the transmitter. Our ears are too close together to get a
bearing on low frequency sound.

That would make it patently less directional. 8^)

If you assume human ears are the only way to receive sound

The context is foghorns, which are usually there expressly so that
humans can hear them.

BB

Fog yes.

"DSK" wrote in message
...



Gerard Weatherby wrote:
Not really. The ability to determine the source of the sound is
determined by
the receiver, not the transmitter. Our ears are too close together
to get a
bearing on low frequency sound.

Does that tell us something about the shape of your head?


wrote:
That would make it patently less directional. 8^)


Gerard Weatherby wrote:
If you assume human ears are the only way to receive sound


wrote:
The context is foghorns, which are usually there expressly so that
humans can hear them.

If a horn blows in the fog, and there is nobody there to hear it, does it
make a
sound?

DSK

On Fri, 01 Aug 2003 13:29:18 -0400, wrote:

Not really. The ability to determine the source of the sound is determined by
the receiver, not the transmitter. Our ears are too close together to get a
bearing on low frequency sound.

That would make it patently less directional. 8^)

If you assume human ears are the only way to receive sound

The context is foghorns, which are usually there expressly so that
humans can hear them.

So why would being less directional be an advantage for foghorns? Wouldn't it
be better if you could tell exactly which bearing the sound came from?


S/V Cat's Meow
http://www.catsmeow.org

If a horn blows in the fog, and there is nobody there to hear it, does it make a
sound?

Yes.
--
katysails
s/v Chanteuse
Kirie Elite 32
http://katysails.tripod.com

"Women and cats will do as they please, and men and dogs should relax
and get used to the idea." - Robert A. Heinlein

and the higher pitched noises might have other unwanted side effects.


That's what I said in my non-physic-y way....

--
katysails
s/v Chanteuse
Kirie Elite 32
http://katysails.tripod.com

"Women and cats will do as they please, and men and dogs should relax
and get used to the idea." - Robert A. Heinlein

No

Nobody

What? Are you deaf?

--
katysails
s/v Chanteuse
Kirie Elite 32
http://katysails.tripod.com

"Women and cats will do as they please, and men and dogs should relax
and get used to the idea." - Robert A. Heinlein