Let's take a look at one electronic regulation after World War II.
In 1958, the first cardiac pacemaker was installed in a person. Almost immediately, people with these implants complained to Congress and their doctors that nearness to a microwave oven could shut off their pacemaker.
In 1971, after 13 years of complaints from diners with pacemakers, the FDA ruled that restaurants had to post notices if a microwave oven was on the other side of a wall.
In 2015, we have many more kinds of medical implants besides cardiac pacemakers. No agency tracks or regulates their use.
Interference, Gary explained to me, is any unwanted effect--like someone playing music loudly when you want to hear a phone conversation.
Electromagnetic interference is when electrical or magnetic fields produce an unwanted effect, typically at lower frequencies, by induction.
Radiofrequency interference is when electromagnetic fields produce an unwanted effect, typically at higher frequencies, by radiation.
Electromagnetic signals make devices like motors, power lines, radio, TV and cell phones work. Geophysicists might consider these same signals noise and interference, especially while they study earthquakes, environmental contamination, or infrastructure problems like corroding pipelines with extremely sensitive meters that measure changes in electromagnetic fields.
Next Page 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15
(Note: You can view every article as one long page if you sign up as an Advocate Member, or higher).
1
1
1
