Automatic on call volume Controller

I want Project on urgent base if anyone can do this kindly bid with solution summary No bid without summary is accepted. Here is detail: i need android or iphone app that when i make a phone call now app adjust my speaker volume according to my environment noise for example when i am in silence environment the speaker volume set to normal now i am running towards noisy environment like factory etc the speaker volume vary this all operation will be on call. bid with solution summary only accepted