The output from the above machine is fed into the NW300CC (secondary crusher ... rated at 90-106db ) ,pictured below, This machine crushes the rock to smaller sized material, even to the size used in asphalt (an option for Shott to produce road material on site if he wishes). The outputs can then be moved to piles, based on the grade of material, by ML33 LP stacker equipment (conveyer belt .. 85 db). The collective noise generated when all the equipment is running at the same time is much louder than the indivual sound numbers.Keep in mind...Unlike a neighbor who mows the lawn or starts up a chain saw for a few hours, Mr Shott proposes to have these machines running all day long 5-6 days a week for 28 years.The maximum daytime noise level accepted by the World Health Organization is 55 dBA or less (night time 45 dBA).

Also in the process, a backhoe (don't know the ..db), and a Euclid R-50 (90db) off road truck is identified to move stockpile material..
ROCK TRAVELS... Blasted from rock face (don't know the ..db of the blast).. Front end loader Cat 988 (92db) loads the rock into LT105. Output is loaded (maybe another front end loader) into the NW300CC, crushed and sent to the stackers. From there material is loaded (maybe another front end loader) into Tandem axel dump trucks (another piece of equipment don't know the--db) and hauled to market destination. This will give you an idea of the "small" mining operation Shott Rock intends to whistle by the community.

NOTE for some other information related you might want to check out these sites
http://personal.vsnl.com/sahasram/stone.htm
This site has restrictions for stone crushers in India which by their requirements. This site has restrictions for stone crushers in India. THESE RESTRICTIONS INCLUDE THE REQUIREMENT THAT THE CRUSHER SHOULD BE AT LEAST 830 FEET FROM ANY RESIDENCE.

A Canadian site with some good information is:
http://www.korinek.ca/noise.html

back to home page...

db equivalents

225 Deafening 12" Cannon @ 12ft, in front & below
194 Saturn Rocket, 50# TNT @ 10f't
140 Artillery fire, jet aircraft, ram jet
130Threshhold of Pain >130 causes immediate ear damage
Propellar aircraft at 5 meters Hydraulick press, pneumatic rock drill
120 Thunder, diesel engine room Nearby riviter
110 Close to a train, ball mill
100 Very loud Boiler, home lawn mower Car horn at 5 meters, wood saw
90 Symphony or a band >regularly can cause ear damage
Noisy factory Truck without a muffler
80 Loud Inside a high speed auto Police whistle, electric shaver Noisy office, alarm clock
70 Average radio Normal street noise
60 Moderate Normal conversation, close up
50 Normal office noise, quiet stream
45 To awaken a sleeping person
40 Faint Normal private office noise Residential neighborhood, no cars
30 Quiet conversation, recording studio
20 Very Faint Inside an empty theater Ticking of a watch Rustle of leaves Whisper
10 Sound proof room Treshhold of hearing
0 Absolute silence

RELATED INFO

Sound and Noise Sound intensities are typically measured in decibels (db). A decibel is defined as 10 times the logarithm of the power ratio (power ratio is the ratio of the intensity of the sound to the intensity of an arbitary standard point). Normally a change of 1 db is the smallest volume change detectable by the human ear. Sound intensity is also defined in terms of energy (erg) transmitted per second over a 1 square centimeter surface. This energy is proportional to the velocity of propagation of the sound. There are scientific formulas to calculate the energency density. The OSHA act of 1970 defines the exposures, limits and when hearing protection is required. Perceptions of changes in sound are identified as:
3 db... Barely perceptible,
5 db... Clearly perceptible,
10 db Twice as loud
. Note that the sound level scale in decibels is a logarithmic rather than linear scale. A sound level of 3 db is double (or half ) of the previous power level. The ear registers this as just noticeble. A change in power level of 10 db is a power change of 10 times, and the ear judges this as only twice (or half) as loud. These relationships do not hold true at all power levels or at all frequencie, as the ear is a very non-linear device.
See Fletcher-Munson hearing curves published in books on hearing.
Ref: Pocket Ref (Second Edition) Thomas J. Glover Sequoia Publishing Decibels Degree Loudness or Feeling

......for even more complicated sound math you might want to go here

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