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Sound level meters are commonly used in noise pollution studies for the quantification of different kinds of noise, especially for industrial, environmental, mining and aircraft noise. [ 2 ] [ 3 ] The current international standard that specifies sound level meter functionality and performances is the IEC 61672-1:2013.
The computer model allows cost-effectiveness evaluations of a host of alternative strategies. In Canada, Transport Canada prepares noise exposure forecasts (NEF) for each airport, using a computer model similar to that used in the US. Residential land development is discouraged within high impact areas identified by the forecast. [19]
A Dolby noise-reduction system, or Dolby NR, is one of a series of noise reduction systems developed by Dolby Laboratories for use in analog audio tape recording. [1] The first was Dolby A, a professional broadband noise reduction system for recording studios that was first demonstrated in 1965, but the best-known is Dolby B (introduced in 1968), a sliding band system for the consumer market ...
Alvarion developed a noise mitigation algorithm to provide continuous service in a noisy environment. [ 18 ] Following was the WBSn platform compliant with the IEEE 802.11n standard and holding the International Protection Marking of IP68 , making it suitable for extreme outdoor conditions.
Noise barriers can be effective tools for noise pollution abatement, but certain locations and topographies are not suitable for use of noise barriers. Cost and aesthetics also play a role in the choice of noise barriers. In some cases, a roadway is surrounded by a noise abatement structure or dug into a tunnel using the cut-and-cover method.
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Lower fidelity recordings can be made at 3.75 or even 1.875 ips, which allows more recording time on a given tape, but at the cost of adding more high-frequency noise. [ 9 ] The cassette tape was designed for convenience, not audio quality, and ran at 1.875 ips (4.75 cm/s) to maximize recording time in the relatively small (compared to open ...
‘This is the noise of my shredder shredding your business plan—never call me again’: But a trio of 20-something entrepreneurs refused to quit and now run $16.7 billion investment firm ...