Descriptive ethics will hence try to oversee whether ethics still holds its place. Because descriptive ethics involves empirical investigation, it is a field that is usually investigated by those working in the fields of evolutionary biology, psychology, sociology or anthropology. Information that comes from descriptive ethics is, however, also used in philosophical arguments.
To deactivate an ICD or alter pacemaker function, a magnet has to have a field strength of 10 gauss (a unit of magnetic strength) or greater next to the surface of the device. A magnet in a stereo speaker has a field strength of 100 gauss at the surface - but 0 gauss 6 inches away.
People with pacemakers used to be told to steer clear of microwave ovens because of possible interference microwaves could cause to the electrical device implanted in their chests. Now they must worry about cell phones, security systems, magnetic resonance imaging (MRI), even therapeutic magnet mattress pads.