As you are talking to your colleague over the phone, the sound of an airplane flying low drowns out part of your conversation. Immediately after, your cell phone rings, again disturbing the flow of conversation. Both of these are instances of:

Interference.

Explanation:

As the user is communicating with their friend through the mobile, most of their interaction is interrupted by the noise of an airplane flying at low hight. Instantly afterward, the user's mobile phone rang, disrupting the communication once more.  

So, according to the following scenario both of those are examples of interference.

d < 200

the distance to the nearest exit door is less than 200