I live in a very noisy neighborhood with a generator that can be unbearable. Double glazing, acoustic protection are of little relevance in my case. As I doubted the effectiveness of this type of helmet, I took one that was not too expensive. It is so effective against ambient rumor we find calm. Also the batteries last few days of continuous use, which does not make it too costly use. However, if we try to eliminate the noise of voices or music, it is not appropriate, since you can listen to the radio or television, headphones on.
