SOUND SERCH IN USER CONTRIBUTED DATABASES USING VOICE IMITATIONS DAVID SANCHEZ BLANCAS - POMPEU FABRA UNIVERSITY 2013 - Num of Users: 17 - Notation: N-S-UU > N: ID of semantic field (1 cat, 2 dog, 3 car, 4 drums > S: ID of class (1 to 3 for cat/dog, 1 to 4 for car/drums) > UU: ID of user (From 00 to 16).