QuietComfort 25 Noise Cancelling Headphones (Apple). QuietComfort 25 headphones are re-engineered to sound better, be more comfortable and easier to take with you. Put them on, and all of sudden the whole lot changes. Your music is deep, powerful and balanced, and so quiet that each note sounds clearer. Even air go back and forth becomes enjoyable, as engine roar gently fades away. Regardless of how noisy the arena is, it is just you and your music-or just peace and quiet.
Ear coupling: Over-ear (circumaural)
Number one application: General listening
Secondary application: No longer applicable
Operating principle: Closed