You're on this forum because you have more than a passing interest in sound. Can I heartily recommend the BBC documentary: "Sound Waves: The Symphony of Physics". On BBC iPlayer from today.
Watched the BBC4 broadcast earlier tonight. Well done bringing it to everyone's attention Leeps.
One more to come next week. Without BBC4, I wouldn't have much use for my telly.
(Back in October, I stood where Helen Czerski stood, next to be Big Ben. I found it to be quite an emotional experience, especially without the supplied earplugs!)