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Open accessJournal ArticleDOI
01 Nov 2012-Noise & Health
148 Citations
These studies emphasize the need to launch an improved noise exposure policy for hearing protection along with developing more efficient norms of NIHL risk assessment.
We believe this is the first demonstration of amplifierless link noise figure of less than 3 dB.
The study showed that using advanced takeoff procedures in noise certification could result in a 2.25 dB reduction in the amount of noise suppression required to certify this configuration for Stage 3 noise limits.
In addition, initial tests show that this method is capable of reproducing experimental noise measurements within 3 dB accuracy.
Knowing the associations between these costs of noise pollution can be a convenient tool for planners and policy makers, offering an opportunity to make predictions of aircraft noise when only estimates of road noise are available, and vice versa.
The results show that significant noise reductions of over 3 dB of both the mixing noise and the broad band shock associated noise can be achieved.
Our results also show that 1/f 3 noise is more predictable compared to 1/f 2 noise and in a fair comparison it affects the performance less.
Tests show that this approach is capable of reproducing experimental noise measurements to within an accuracy of 3 dB, and predicts similar noise levels to fully three-dimensional simulations.

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