SOUND-ENVIRONMENT INTERACTION
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Answer |
It's likely in the
door closing experiment, that you heard little change in
the sound level until the door was almost closed, and
then there was a sudden drop as it was completely
closed. Any air space in a barrier is likely to reduce
its effectiveness at shutting out sound. Likewise, most people report no change in sound as to whether their hair is covering their ears or not. In some ways, this is more remarkable, as the hair is definitely a visual barrier, but at the molecular level of sound waves, there still is a lot of air space between the hairs. |