Blast noise

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estudioacustico@terra.cl - 16 Apr 2006 03:56 GMT

Friends:
can i get sound levels from open site blasting in mines, at different
distances, for example, in the web?
Thanks

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Ken Plotkin - 16 Apr 2006 15:25 GMT

>Friends:
>can i get sound levels from open site blasting in mines, at different
>distances, for example, in the web?
>Thanks

Yes. The Bureau of Mines and Office of Surface Mining have a lot of
reports available for free download. I don't have a URL handy, but I
recall it was not hard to locate with a google search.

Blast noise from mines is fairly situation dependent, so don't look
for simple relations based on only the charge. There can also be
significant seismic propagation.

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Salmon Egg - 16 Apr 2006 18:36 GMT

On 4/16/06 7:25 AM, in article 9ok44256uiuap8dvk8dn10imsfp6l3slvp@4ax.com,

>> Friends:
>> can i get sound levels from open site blasting in mines, at different
[quoted text clipped - 8 lines]
> for simple relations based on only the charge. There can also be
> significant seismic propagation.

Weather conditions are also important. A temperature inversion will bend
sound back to ground level while the same sound will get bent into the sky
if the temperature of the air decreases rapidly with amplitude. This effect
is very obvious where I live, about a mile or two from a jet airport.

Bill
-- Ferme le Bush

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estudioacustico@terra.cl - 16 Apr 2006 20:18 GMT

thanks a lot

Luck

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Natural Science Forum / Physics / Acoustics / April 2006

Blast noise