How do I make an Audio Sensor?!?

I am making a project that requires an audio sensor. I need my arduino uno to be able to register a short burst of loud noise. Could someone please give some advice as to what mic. and amp to use. Parts lists and schematics would be very helpful. Thank you.

I've been using a piezo like that says, but it has a hard time registering sound, any advice to make it more sensitive or to amplify the signal? ?

Is there a way I can make this 100x amp with an op amp chip? If so could you please post the schematic or name of the type of amp?