Headphones of good quality, with his correct. The noise filter for bass, works wonders. The noise of the bus arrives to disappear completely, aircraft noise is against this most especially if the headphones are crimped. It is therefore very important to position his headphones in the ears with the right sizes of earpads (3 types of rubber earbuds come with) I'll try the foam tips, this should improve the decrease in external noise aircraft. When the filter is disabled, the difference is obvious, and restarts it quickly. Good quality / price ratio, recommendable device for travelers.