The webapp provides for each item the link on ECB's website.
Speeches for : Lucas Papademos where "signal" appeared
2009-12-03 : Introductory statement with the Q&A2006-12-01 : Monetary Policy in a Changing World: Commitment, Strategy and Credibility
2005-04-07 : Introductory statement with Q&A
2004-04-01 : Introductory statement with Q&A