House Of Sound - brass instruments скачать в хорошем качестве

House Of Sound - brass instruments

In the House of Sound where the science of music and musical instruments is always being investigated, Greg Foot and Fran Scott investigate brass instruments and how they make their loud, bright sounds. They explain that in order to make a sound a brass players lips must be made to vibrate very, very quickly. When placed against the mouthpiece of the instrument the air inside begins to vibrate too forming sound waves. To make different notes the amount of air vibrating inside the instrument has to be changed. On a trombone a part called the slide makes the tube of air that vibrates longer or shorter, and this changes the pitch of the note from lower to higher. On an instrument like a trumpet three parts called valves can be pressed down to change the amount of air. Fran and Greg demonstrate how a sound wave travels using a large metal spring and form a standing wave with a length of rope. Finally Fran shows viewers how you can easily make a simple horn from a funnel, length of hosepipe and a hosepipe connector for a mouthpiece.