Have you ever put a cardboard tube up to your ear? What you hear depends on whether the tube is right up against your ear or offset so there’s a space between your head and the tube, because it goes from being a closed end to an open end air column, which changes the standing wave pattern inside. Here’s how to figure it out:

[am4show have=’p9;p58;’ guest_error=’Guest error message’ user_error=’User error message’ ]

Click here to go to next lesson on Record Players.

[/am4show]