Setting this option to On means Siri is ready to accept commands when you raise your phone to your ear. You can always invoke Siri by pressing and holding your iPhone's Home button. Tap the Home button to exit Settings.
Effective listening is a way of showing concern for subordinates, and that fosters cohesive bonds, commitment, and trust. Effective listening tends to reduce the frequency of interpersonal conflict and increases the likelihood that when conflicts emerge they will be resolved with a win-win solution.
There are a lot of people out there concerned about electromagnetic fields (EMF) and electromagnetic radiation (EMR or also known as radio frequency (RF)). People want to know how to measure EMF. So much so, that they purchase detectors and meters for themselves and attempt to study their own property and homes. It is great to take responsibility for your own concerns! However, there are likely many things that could be confusing your personal assessment.