Who wrote this whistle will be heard!

I use the pipe primarily of professional event. In the military seafaring is marked with shunting whistles the start of a driving maneuver, with the kick-off must also be performed by remote staff despite loud engine noises and noisy environments. This pipe makes this matter to ease. For an appropriately loud sound it requires little effort - the border was not fully tested to date.
In its nature the whistle makes an impeccable and very good impression. I have nothing to complain about!