 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.
Tip Enabled the Stereo Mix device, if you have this option, will allow you to record all sounds played on your computer using Sound Recorder without a microphone. Here's How: 1. Open the Control Panel. (Classic View) NOTE: Open the Start menu and click on the Control Panel menu button.2. Click on the Sound icon.ight click on each listed disabled audio device that you want to enable and click on Enable. (See screenshot below) 7. You will now see this when the audio devices are enabled. (See screenshot below) NOTE: You can now change the properties settings on these audio devices to how you want them.