ラッシュアワーとかだとどうなんだろ

　⇒The Associated Press: Music headphones can interfere with heart devices

NEW ORLEANS (AP) — Have a pacemaker or an implanted defibrillator? Don't keep your iPod earbuds in your shirt pocket or draped around your neck — even when they're disconnected. A study finds that some headphones can interfere with heart devices if held very close to them.