Barriers

Within an industry you are going to meet people with who do not speak English as good as you or be as fluent as you. This creates barriers when communicating with others. The way we speak to others is very important as some people may understand things in different ways. For example, some people may understand more in a formal tone and others may not.

Examples of barriers:
Background noise
Lack of communication and types of questions
Lack of confidence
Understanding of speech

http://www.smartmanager.com.au/eprise/main/cms/content/au/smartmanager/en/pages/language_barriers_in_the_workplace.html

http://oahyasminunit1.blogspot.co.uk/2011/05/barriers-to-communication-and-how-they.html