"The earclip design also means that the headphones leak sound, and there's little or no blocking of external noise. Using them on a busy train would almost certainly upset your fellow passengers. They're also
more of a faff to put on and take off than other types of earphones – not ideal for glasses-wearers or people whose hair has to be just so."
"Despite our reservations about the earclip design, there's no denying that the ATH-EM9D offer a great sounding alternative to in-ear headphones. They leak a lot of sound, so aren't ideal for your commute, but having the phones outside your ear makes for a more natural listening experience and a more realistic feel."