Talk:Helicopter noise reduction

Assessment comment
Substituted at 17:35, 29 April 2016 (UTC)

Volume relativity between types of noises
For example: What is louder: the rotor or the engine? What I'm missing is a graph showing the volume relativity between all the types of helicopter noises. That is: Because, for example: in a Bell UH1D the relativities myght differ much from latest models. Steue (talk) 02:42, 5 May 2022 (UTC)
 * on the vertical axis: the volume.
 * on the horizontal axis: the models, sorted by their years of putting the model into the market.