On a poorly silenced, under-propped aircraft, this is the order of importance of their contribution to the overall noise output.
The most successful approach when attempting to reduce noise is to tackle the dominant source of noise first. When this source has been controlled, the next most important source should be tackled. It makes no sense to try and reduce overall noise by tackling a source responsible for only 5% of the total noise output. Far better to reduce the source of 90% of the noise, if only by half.
The ideas presented in this section are deliberately given in outline, as the detail has been covered in several magazine articles over the years. See the bibliography. |
