 Tear down this wall!  was the challenge issued by United States President Ronald Reagan to Soviet Union leader Mikhail Gorbachev to destroy the Berlin Wall, in a speech at the Brandenburg Gate near the Berlin Wall on June 12, 1987, commemorating the 750th anniversary of Berlin.n the 1963  Ich bin ein Berliner  speech, U.S. President John F. Kennedy stated the support of the United States for democratic West Germany shortly after the Soviet-supported Communist state of East Germany erected the Berlin Wall as a barrier to prevent movement from East to West.
Feedback happens when a microphone picks up sound from speakers and then pipes that same sound back through the speakers and picks it up again. The never-ending loop of ear-pain is frustrating to experience, but fairly easy to fix by adjusting the levels of the speakers and microphone.
You may hear feedback from your PC speakers when one or more of the the following conditions are true: 1  You increase the Microphone Boost option. 2  The speakers are too close to the microphone.3  The speaker volume is turned up so as the microphone hears the speakers. 4  You have a very sensitive microphone.ou may hear feedback from your PC speakers when one or more of the the following conditions are true: 1  You increase the Microphone Boost option. 2  The speakers are too close to the microphone.