The effect produced when sound is reflected back is known as what?

More Questions:

Chuck Taylor was the first endorser of what popular brand of shoes?

What is the total weight of a full standard set of billiards balls, including the cue ball?

What is traditionally the main fruit ingredient in a tarte tatin?

What game did Charles Darrow based upon the "The Landlord's Game"?

The Turing Award is an award given in what field?

What billionaire piloted the first hot-air balloon ever to cross the Atlantic?

What photographer had a twenty-year relationship with late author Susan Sontag?

What two metals form the alloy white gold?

What disease does the "tine test" detect?

George Lucas" first full feature film, "THX 1138" was released in what year?

How many roles did Cheech Marin play in the 1996 movie "From Dusk Till Dawn"?

What nation was led by the Congress Party from 1947 to 1996 almost uninterrupted?

What nation was led by Akbar the Great?

What is Eddie's last name in the TV show "The Courtship of Eddie's Father"?

What is the largest North American country by land area?