Sound - Sound Intensity - Episode 207



Radio Investigation
Investigate how sounds fade with distance. Go outside and stand back-to-back with a friend. You'll need two portable radios with speakers, not earphones. Your friend sets her radio to loudness setting of 2 (on a scale of 1 to 4); you set yours to a setting of 1 (quieter than your friend's radio). You walk away until you think your friend's radio sounds as loud as yours. Measure the distance. Now return to your friend. Keep your radio at 1, but have your friend turn her radio to 3. Walk away again until they sound the same. Repeat with your friend's radio at 4. What do you notice about the distance?