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Results 1 - 10 from 14 for attenuation values in 0.307 sec.

Noise: Occupational: Heaing Protection Selection
Hz to 8 kHz (63 Hz is optional); assumed protection values at each centre frequency [the mean attenuation minus the standard deviation at each frequency] H - High, M - Medium and L - Low frequency attenuation values in accordance with ...
noisenet.org

NPC Law Library: Code of Federal Regualtions 40 CFR 211
[Page 177]] test at each octave band equal or exceed the lowest attenuation values obtained from all previous compliance ... .211 before distributing them in commerce. The manufacturer shall relabel at values no greater than any mean attenuation values received from Compliance Audit Testing. Any manufacturer who proceeds with ...
nonoise.org

NWI Values of Wetlands for Flood and Storm Surge Attenuation
Values of Wetlands for Flood and Storm Surge Attenuation Wetland Functions: Flood Storage and Storm Surge Attenuation Wetlands provide many functions that are valued by people. These functions (and their values ... , and aesthetics). Destruction of wetlands eliminates or severely minimizes their functions and values. Drainage of wetlands prevents surface water storage and reduces their water quality ...
www.fws.gov

The Regional Impacts of Climate Change
Along the east coast of Africa, sea-level rise and climatic variation may decrease the attenuation of coral and patch reefs that have evolved along major sections of the continental shelf ... . If average erosion were 20 m along 50% of the remaining coast (and assuming land values on the order of 5 Egyptian pounds per m2), the total loss would be about ...
www.grida.no

MIN3P - Elliot Lake Tailings
Modelling of the Elliot Lake Tailings Introduction MIN3P can be used to simulate the generation, attenuation and treatment of acid mine drainage. An example application focuses on processes in the ... and jarosite (pH ~ 2) (Figure 2). Figure 1. Vertical profile of simulated and field-measured values of water saturation, oxygen content and remaining pyrite content Copyright 2000 (ICARD) Figure 2. ...
www.science.uwaterloo.ca

Leachate
High concentrations of ammoniacal nitrogen often found in leachate may also (especially at high pH-values), cause health problems to sewer maintenance staff. The process adopted for the removal of methane ...
leachate.co.uk

A Quick Expalantion of the term "decibel"
B to % shielding (notice that because of the logarithmic relationship, values in excess of 20 dB represent field strength reduction of more than 90%!): Furthermore, ... that using this formula, values in excess of 20 dB represent field strength reduction of more than 99%!): POWER FIELD dB Power Ratio % Attenuation % Transmission Field Ratio % Attenuation % Transmission 0 1 ...
lessemf.com

Environmental Resources
The Miami ... Tables 3-8 (4.3 MB) Default parameters, chemical specific values, Sources and Derivation of Toxicity Values Used in Calculations for Carcinogens, Chemicals Sorted by Target Organ, ...
www.co.miami-dade.fl.us

Data and Satellite Imagery - Data Description
It can also be empirically related to the diffuse attenuation coefficient and Secchi disc depth. The sea surface temperature (SST) product is derived from a ... can result in abnormally high reflectance. A good rule of thumb is that high reflectance values near clouds are suspect. Some of the images show a bias of high reflectance near ...
www.csc.noaa.gov

Glossary of Terms - Environmental Protection Agency, Ireland
The value of a ranked distribution above (or below) which 98 per cent of values in the distribution lie, depending on application. A Acid Sensitive - Surface water and soils that ... deposition in the form of rain and snow, or as a result of vapour exchanges. Attenuation - The reduction in magnitude/intensity/concentration of a substance dispersed in a gaseous or liquid ...
epa.ie